{"title":"datalogging sensors","description":null,"products":[{"product_id":"sound-level","title":"Sound level","description":"\u003cp\u003eDual range sensor that accurately measures both sound pressure level in decibels (dBA) or waveform (mV). \u003c\/p\u003e\n\u003cp\u003eTo make the measurements meaningful to learners, the sensor has been designed to approximate the normal human ear in the range and intensity that it 'hears' sounds. Use a pair of sensors to measure speed of sound in air and solids. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/s219bxrNo8s\" height=\"113\" width=\"200\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 33-sec \u003cspan\u003eData Harvest - Sound sensor 40 - 110 dBA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/v0B2p1EFNvs\" height=\"113\" width=\"200\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 17 sec -\u003cspan\u003eSpeed of sound through air \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm3.staticflickr.com\/2937\/13843505305_f350387432_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eTeaching applications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency of sound\u003c\/li\u003e\n\u003cli\u003eSpeed of sound\u003c\/li\u003e\n\u003cli\u003eSound insulation\u003c\/li\u003e\n\u003cli\u003eDecay of sound with distance\u003c\/li\u003e\n\u003cli\u003eFrequency, wavelength, amplitude of sound waves\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm4.staticflickr.com\/3812\/13739184694_9b71dbf0b0_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv class=\"activity-title\"\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eExtension and advanced ideas:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eEars\u003c\/li\u003e\n\u003cli\u003eBiometrics\u003c\/li\u003e\n\u003cli\u003eEffect of sampling rate on sound quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3175_ds027_4_sound.pdf\" download=\"\"\u003eDownload\u003c\/a\u003e Sound Sensor Manual \u003cspan\u003eDoc No.: DS027 | Issue: 4\u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23bdbbbd\u0026amp;d=3175_ds027_4_sound\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSensor Ranges\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"techspec\" class=\"table table-bordered\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRange Name\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaveform\u003c\/td\u003e\n\u003ctd\u003e±2000mV\u003c\/td\u003e\n\u003ctd\u003e1mV\u003c\/td\u003e\n\u003ctd\u003eFrequency response: 100 Hz - 7 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound Level\u003c\/td\u003e\n\u003ctd\u003e40 to 110 dBA\u003c\/td\u003e\n\u003ctd\u003e0.1dBa\u003c\/td\u003e\n\u003ctd\u003eResponse time: 125 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cdiv id=\"editable-additional-info\" class=\"product-additional-info\"\u003e40 to 110 dBA (Resolution 0.1 dBA)\u003cbr\u003e±2000 mV (Resolution 1 mV)\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003ePhysics\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L2_27-50_compact.jpg?v=1491145555\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eSpeed of sound by reflection (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-age-11-14-ebook\" target=\"_blank\"\u003ePhysics (11-14) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIn this experiment a sound is sent down a pipe, which is closed at one end. The time interval between the sound setting off and returning to its starting point is measured, using a Sound sensor. The results are used to calculate the speed of sound. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpeed sound using 2 sound sensors (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this experiment, a sound is detected by two Sound sensors which are separated by a known distance. The time interval between the sound striking the first sensor and striking the second sensor is measured. The results are used to calculate the speed of sound. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eSpeed of sound in a solid (with sound sensors) (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-light-sound-pressure-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Light, Sound \u0026amp; Pressure eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eIn this experiment, a sound is detected by two Sound Sensors which are separated by a known distance. The time interval between the sound striking the first sensor and striking the second sensor is measured and used to calculate the speed of sound through the chosen medium. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpeed of sound In air (with sound sensors) (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eIn this experiment, a sound is detected by two Sound sensors which are separated by a known distance. The time interval between the sound striking the first sensor and striking the second sensor is measured. The results are used to calculate the speed of sound. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpeed of sound (by Reflection \/ echo) (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eIn this experiment a sound is sent down a pipe, which is closed at one end. The time interval between the sound setting off and returning to its starting point is measured, Only requires single sound sensor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpeed of sound In air by phase difference. (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eIn this experiment a signal generator is producing a sinusoidal wave of known frequency. A voltage sensor placed across the output terminals of the signal generator measures the signal at the source of production. A loud speaker is used to make the signal audible and a sound sensor records. The point at which phase matches is equal to lambda. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSounds (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eAn introductory investigation giving plenty of opportunity for students to explore sounds and identify the characteristics that create tone, pitch, timbre etc in musical description of sound. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHow does the instrument affect the sound produced? (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eexamines the same sound from different instruments. Good introductory activity for sound, also good for analysing waveforms for differences and similarities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHow does stereo sound work? (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eThis is an activity that can be presented as part of physics discussions on waves, superposition and phasing or as part of work on the ear and sensory reception and perception. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInterference In sound (using Snapshot) (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation the interference between sound waves of identical frequency but emitted from different sources is investigated. Could be used before looking at interference in light, or as part of the argument about light being both a wave and a particle.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInvestigating resonance In a pipe (with a plot of distance) (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation the students will be able to study the relationship between the length of the pipe and its resonant frequency and be able to reveal the nodes and anti nodes created in a standing wave in the pipe. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBiometrics and sounds (voice recognition) (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eIn this practical, students will look at one simple biometric, voice recognition. We know that our voices carry information about our identity. We have all experienced the voice on the telephone we recognise, or our friend talking in a crowded room. Here is simple, fun, activity to investigate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWaves and superposition (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation allows the students to collect waves generated by a signal generator and use the tools in the EASYSENSE software to add them and see the effects of superposition. This can be complex idea for many students and the ability to use real data and waves gives an alternative learning path. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience in Sport\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-in-S_103-50_compact.jpg?v=1491146680\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eWho won (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-in-sport-age-11-18-ebook\" target=\"_blank\"\u003eScience in Sport (11-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eIn this experiment, the students will measure the speed between two points, the start and the finish. It is a model of how timing and speed sensors work and can be used in sport. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_29-50_compact.jpg?v=1491146769\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eBiometrics (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIn this practical the student will look at a simple biometric, voice recognition. We know that our voices carry information about our identity can we detect it?\u003c\/span\u003e\u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":16612127492,"sku":"3175","price":798.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/sound-level-sensor-in-use.jpg?v=1616221377"},{"product_id":"voltage-differential-20v","title":"Voltage - Differential 20V","description":"\u003ch3\u003eMonitor voltage over a fast short or long slow period of time in addition to spot measurements. \u003c\/h3\u003e\n\u003cp\u003e \u003ciframe width=\"300\" height=\"169\" src=\"https:\/\/www.youtube.com\/embed\/SBLjdWSv8o0\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 53-sec capacitor - charge \u0026amp; discharge\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/farm4.staticflickr.com\/3740\/13760404494_cc1926bb8b_m_d.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eTeaching applications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eIntroductory electricity\u003c\/li\u003e\n\u003cli\u003eOhm’s law\u003c\/li\u003e\n\u003cli\u003eSimple series and parallel circuits\u003c\/li\u003e\n\u003cli\u003eStartup of a filament lamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eExtension and advanced ideas:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eInduction of voltage in a coil\u003c\/li\u003e\n\u003cli\u003eElectrical characteristics of components\u003c\/li\u003e\n\u003cli\u003eVoltage and homemade sensors\u003c\/li\u003e\n\u003cli\u003eDynamo effect\u003c\/li\u003e\n\u003cli\u003eTime constant, charge discharge of a capacitor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3160_ds021_6_voltage.pdf\" download\u003eDownload\u003c\/a\u003e Voltage Sensor Manual  Doc No.: DS021 | Issue: 6\u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c4b4b4\u0026amp;d=3160_ds021_6_voltage\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cdiv class=\"product-additional-info\" id=\"editable-additional-info\"\u003e±20 V (Resolution 10 mV) \u003cbr\u003eMaximum Voltage ±27 V, Impedance 1 Meg ohm\u003c\/div\u003e\n\u003cdiv class=\"product-additional-info\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-additional-info\"\u003e\n\u003cp\u003eVoltage sensors measure the potential difference between the ends of an electrical component and are connected in parallel. They can be used to measure both DC and low-voltage AC circuits. They should never be used with high voltages or household AC. The 4 mm plugs attach to most standard school’s electronics kits and power supplies.\u003c\/p\u003e\n\u003cp\u003eA Voltage Sensor can be used in conjunction with a Current Sensor. Batteries are the first choice as the source of energy. An alternative is to use a fully isolated mains power supply with a regulated DC output (smoothed and fully rectified).\u003c\/p\u003e\n\u003cp\u003eBe aware that some power supplies are ½ wave rectified producing an average rather than true DC, this sensor will ‘pick up’ the fluctuations in voltage and current from this type of power supply. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003ePhysics \u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L2_02-50_compact.jpg?v=1491176880\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eElectricity from water power (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-age-11-14-ebook\" target=\"_blank\"\u003ePhysics (11-14) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eUse a simple water wheel to make electricity via generator. Monitor the voltage and or current over time against other variables e.g. flow, fall height etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eLight and voltage (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eInvestigations with simple solar cells. Voltage produced, current, effect of light intensity, insolation angle etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and voltage in a series circuit (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eThis one of a series of investigations into current in a circuit. This part requires additional lamps and or cells to be added and the changes measured. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eElectrical Equivilence Of Heat (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-electricity-heat-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Electricity \u0026amp; Heat eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe experiment is very simple and compares the power generated in heating a resistance coil to the heat energy transferred to the water. Measurements are made in Joules to emphasise the transfer of energy. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eStefan - Boltzmann law. (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe experiment illustrates the Stefan - Boltzmann law. It does not give a value for the Boltzmann constant. A simple tungsten filament automotive lamp is used as the source of thermal radiation. The investigation tests if the radiation is really to the 4th power of temperature.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCalibration of a thermometer (Seebeck effect) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIn the investigation two junctions are used, one is placed in a constantly cold temperature the other has varying temperatures applied to it. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpecific heat capacity of a solid (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation will measure the specific heat capacity of a solid. A block of metal of known mass is heated by an electrical heater through a known number of degrees. The electrical energy required to create this temperature rise is determined and used to find the specific heat capacity. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpecific heat capacity of a liquid (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation will measure the specific heat capacity of a liquid (water). A sample of water of known mass is heated by known number of degrees by an electrical heater.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhat changes the current in a circuit? (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eSimple (revision) exercise to see how the number of cells in circuit changes the current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhat changes the current in a circuit (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eAlternative exercise using snapshot to collect data instead of reading values off a meters screen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eGood and bad conductors (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis activity is a standard practical comparing current flow with different materials in a circuit. Strips of different conductors and insulators are provided for the pupils. Conductors are anything that let a current flow. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eConnecting resistors (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eShows the current in circuit with different resistor values and combinations. Leads to resistor calculations. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and voltage (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIntroductory activity to explore the relationship between current and voltage with an ohmic conductor. In this variant changes in voltage and current are measured against time. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and voltage (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIntroductory activity to explore the relationship between current and voltage with an ohmic conductor. In this variant changes in voltage and current are plotted directly against each other, leading into characteristics of conductors \/ components. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSimple series circuits (lamp resistors) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe effect of a component offering electrical resistance in circuit is revised.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eOhms Law (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eA study of Ohm's law for resistors. Collects data graphically against time to allow the students to change plot to voltage vs current. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eOhms law current vs voltage plot (34a) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eActivity set up to let the software plot voltage vs current directly. Opens the possibility of more investigation of the relationship between voltage and current and the type of resistance. Resistance can also be calculated and plotted. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectrical characteristics (LED, resistor and filament lamp) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eCreate voltage current curves for LED, resistor and filament lamp. This worksheet assumes all three curves in one teaching session. 35a and 35b restrict to fewer devices per session. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectrical characteristics (resistor and filament lamp) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eSpecific worksheet to produce voltage current curves for a resistor and filament lamp (ohmic and non ohmic resistance)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCapacitors: charge stored. (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eCollect voltage and current data during a capacitor charge and discharge cycle. Use built in tools to find the energy transferred and stored. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEfficiency of an electric motor \/ generator (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe efficiency of a motor \/ generator is determined. This worksheets has details of the motor and generator calculations and method \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEfficiency of an electric generator (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eDetermines the efficiency of a generator. Uses a falling mass as the energy source and records voltage and current to produce power curves. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEfficiency of an electric motor (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003euses a known mass lifted through a known distance compared to the power required by a motor to lift the mass. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEfficiency of a transformer (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eSimple experiment to measure volts in and volts out. Data collected can be used to show phase match \/ difference and power in and power out.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eDiodes: ac rectification (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation, you will find out how diodes are used as rectifiers, and learn about the basic circuits in use in rectifier circuits. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eDiodes ac bridge rectification (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003ediscover and investigate how diodes are used as rectifiers, and learn about the basic circuits in use in rectifier circuits. Conversion of an ac current to dc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInput characteristic of a transistor (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation is going to study the input characteristics of the transistor across the B–E terminals by applying an alternating voltage, and measuring the voltage across and the current flowing through the B-E junction. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eTransistor as a switch and current amplifier (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation will show the students that, 1. The base voltage controls the collector emitter current. 2. A small change in the base voltage causes a large change in the collector voltage. 3. The use of this change in the collector voltage to provide switching. Amplification of current is also considered. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eReactance and phase in a capacitor (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eYou are going to measure the current through and voltage across the capacitor at different frequencies. From the data, you will calculate the reactance Xc of the capacitor at different frequencies. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eImpedance and phase difference with frequency (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eInvestigate how, in a series C-R circuit, resistance and capacitance combine to affect the flow of an ac current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eL-R circuits: How does Impendance change with frequency? (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe investigation will show: 1. How impedance of a series l-R circuit increases with frequency. 2. The formula for calculating impedance of a series L-R circuit \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eResonance In an LCR circuit (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eTo find the frequency at which the impedance becomes purely resistive - the resonant frequency. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_02-50_41e5fac5-1314-488c-af7b-aae520c6e177_compact.jpg?v=1491282350\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eWhy do bulbs blow (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis activity uses this familiar event to introduce the idea of power surges and to calculate resistance changes. It is a practical introduction to the relationship between voltage and current and the problem of correctly fusing devices in a home for safety.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMp3 (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this activity the role of the number of samples in collected data is considered using the problem of sound quality in MP3 players as the stimulus. The change in the information in the data files created is easily seen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectric from sunlight (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation you will take a small solar panel and investigate how much light is needed to make electricity. The quantity of electricity produced will be measured as its voltage. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhy is electric ac (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eThis experiment tries to show why it is that the electricity supply is created as an alternating current (AC). \u003c\/span\u003e\u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":16643521220,"sku":"3160","price":557.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/voltage-sensors-in-circuit-2.jpg?v=1616222919"},{"product_id":"voltage","title":"Voltage - Differential 0-10V","description":"\u003ch3\u003e\u003cspan\u003eThis Voltage sensor measures the potential difference across any component in d.c. circuits.  \u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/SBLjdWSv8o0\" height=\"169\" width=\"300\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e\u003cspan\u003e53-sec capacitor - charge \u0026amp; discharge\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm4.staticflickr.com\/3740\/13760404494_cc1926bb8b_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cp\u003e\u003cstrong\u003eTeaching applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntroductory electricity\u003c\/li\u003e\n\u003cli\u003eOhm’s law\u003c\/li\u003e\n\u003cli\u003eSimple series and parallel circuits\u003c\/li\u003e\n\u003cli\u003eStartup of a filament lamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe 4 mm plugs attach to most school based power supplies and available electricity kits. This sensor can be used anywhere within a circuit. This voltage sensor is designed to show only \u003cstrong\u003epositive\u003c\/strong\u003e readings. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3160_ds021_6_voltage.pdf\" download\u003eDownload\u003c\/a\u003e Voltage Sensor Manual  Doc No.: DS021 | Issue: 6\u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c4b4b4\u0026amp;d=3160_ds021_6_voltage\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSensor Ranges\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"techspec\" class=\"table table-bordered\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRange Name\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Differential\u003c\/td\u003e\n\u003ctd\u003e0-10V\u003c\/td\u003e\n\u003ctd\u003e10mV\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOther Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"techspec\" class=\"table table-bordered\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Voltage\u003c\/td\u003e\n\u003ctd\u003e±27V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e1Meg ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cp\u003e0 to 10 V (Resolution 10 mV) \u003cbr\u003eMaximum Voltage ±27 V, Impedance 1 Meg ohm \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003ePhysics\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_E-H_26-50_bbe319ea-b278-4618-a7c2-069ebcd436ca_compact.jpg?v=1491296076\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eGood and bad conductors (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-electricity-heat-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Electricity \u0026amp; Heat eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis activity is a standard practical comparing current flow with different materials in a circuit. Strips of different conductors and insulators are provided for the pupils. Conductors are anything that let a current flow.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eConnecting resistors (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eShows the current in circuit with different resistor values and combinations. Leads to resistor calculations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectrical characteristics (LED, resistor and filament lamp) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eCreate voltage current curves for LED, resistor and filament lamp. This worksheet assumes all three curves in one teaching session. 35a and 35b restrict to fewer devices per session.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectrical characteristics (resistor and filament lamp) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eSpecific worksheet to produce voltage current curves for a resistor and filament lamp (ohmic and non ohmic resistance)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectrical characteristics (Led, diode) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eRestricted instructions for voltage current curves for diodes. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eTime constant of a capacitor (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eA good example of data logging enhancing work. collect voltage (and current data, if required) to study time constants and exponential decay. A very good practical.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_02-50_bbe9c8b7-2e2b-4f63-959b-4bd8df6ea4db_compact.jpg?v=1491296239\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eWhy do bulbs blow (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis activity uses this familiar event to introduce the idea of power surges and to calculate resistance changes. It is a practical introduction to the relationship between voltage and current and the problem of correctly fusing devices in a home for safety.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":16680595140,"sku":"3161","price":557.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/8776026249_e97b94779f_z_grande_grande_f2ff37d5-2701-410f-90a0-061623ab44ae.jpg?v=1491295341"},{"product_id":"timing-mats-pair","title":"Timing Mats (Pair)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTiming mats are pressure sensitive switches designed to be activated as you step on and off the mat.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThese are two sizes of mats that are available.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003estair tread sized (approx. 595 mm long by 170 mm wide) \u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003edoor mat sized (approx. 720 mm long by 390 mm wide).\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA favourite activity for younger children is to find out how long they can stay in the air when they jump.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm3.staticflickr.com\/2814\/13760400225_24a31019bc_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eTeaching applications\u003c\/strong\u003e:\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eIntroducing computer based timing\u003c\/li\u003e\n\u003cli\u003eHow long do I stay in the air when jumping\u003c\/li\u003e\n\u003cli\u003eHow fast do I run, hop or skip\u003c\/li\u003e\n\u003cli\u003eHow many jumps \/ steps in minute\u003c\/li\u003e\n\u003cli\u003eSpeed of a bicycle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cstrong\u003eExtension and advanced ideas:\u003c\/strong\u003e\u003c\/div\u003e \n\u003cul\u003e\n\u003cli\u003eFoot operated trigger\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3255_ds060_4_timing_mats.pdf\" download\u003eDownload\u003c\/a\u003e\u003cspan\u003e Timing Mats Sensor Manual  \u003c\/span\u003e\u003cspan\u003eDoc No.: DS060 | Issue: 4\u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe allowfullscreen=\"true\" style=\"border:none;width:100%;height:326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c0b8b8\u0026amp;d=3255_ds060_4_timing_mats\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cdiv id=\"editable-additional-info\" class=\"product-additional-info\"\u003eSet of two (595 x 170 mm)  or Set of two (720 x 390 mm)\u003c\/div\u003e\n\u003cdiv class=\"product-additional-info\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-additional-info\"\u003e\n\u003cul\u003e\n\u003cli\u003eTerminate in a mini din socket (connect via the sensor lead supplied with the logger) \u003c\/li\u003e\n\u003cli\u003eDigital switch-type sensors\u003c\/li\u003e\n\u003cli\u003eCan be used singly or as a pair for timing and event monitoring connected to timing ports A and B\u003c\/li\u003e\n\u003cli\u003eIf used outside they will need protection from sharp objects\u003c\/li\u003e\n\u003cli\u003eSensitivity decreased if used under floor coverings e.g. carpet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eBiology\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/biology_l2_18-50_compact.jpg?v=1494474451\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHit the brakes! (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-11-14-ebook\" target=\"_blank\"\u003eBiology (11-14) ebook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA variation of simple reaction times. Creating a closer model of how reaction times, and responses to stimuli, influence stopping times in cars.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHit the brakes (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-14-18-ebook\" target=\"_blank\"\u003eBiology (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eExtension of reaction times, uses a foot operated second switch to simulate driving a car. Use the simulation to show effect of distractions (e.g. using phone) on stopping distances.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience in Sport\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-in-S_202-50_compact.jpg?v=1494474549\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHit the brakes! (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-in-sport-age-11-18-ebook\" target=\"_blank\"\u003eScience in Sport (11-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eAn extension to reaction times. How does the environment affect reaction times? Does equipment or the person hold the key?\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_17a-50_64e4ac58-cc59-45db-aeaa-f978cdfdc13a_compact.jpg?v=1494474611\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eReaction times (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eAn electronic reaction timer. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"position: absolute; left: -9px; top: 730px;\" id=\"gtx-trans\"\u003e\n\u003cdiv class=\"gtx-trans-icon\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Data Harvest","offers":[{"title":"smaller 595 x 170 mm","offer_id":16680608644,"sku":"3255","price":620.0,"currency_code":"HKD","in_stock":true},{"title":"larger 720 x 390 mm","offer_id":36144972872,"sku":"3256","price":620.0,"currency_code":"HKD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/smartq-timing-mats-in-use.jpg?v=1616255631"},{"product_id":"voltage-differential-12v","title":"Voltage - Differential 12V","description":"\u003ch3\u003e\u003cspan\u003eMonitor voltage over a fast short or long slow period of time in addition to spot measurements.  \u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/farm4.staticflickr.com\/3740\/13760404494_cc1926bb8b_m_d.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eTeaching applications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eIntroductory electricity\u003c\/li\u003e\n\u003cli\u003eOhm’s law\u003c\/li\u003e\n\u003cli\u003eSimple series and parallel circuits\u003c\/li\u003e\n\u003cli\u003eStartup of a filament lamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eExtension and advanced ideas:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eElectrical characteristics of components\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeat and electrical power\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eVoltage and homemade sensors\u003c\/li\u003e\n\u003cli\u003eTime constant, charge discharge of a capacitor\u003c\/li\u003e\n\u003cli\u003eDynamo effect\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3160_ds021_6_voltage.pdf\" download\u003eDownload\u003c\/a\u003e Voltage Sensor Manual  Doc No.: DS021 | Issue: 6\u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c4b4b4\u0026amp;d=3160_ds021_6_voltage\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cdiv id=\"editable-additional-info\"\u003e±12 V (Resolution 10 mV) \u003cbr\u003eMaximum Voltage ±27 V, Impedance 1 Meg ohm\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e1 MegaOhm of resistance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe sensor detects all voltages over the time selected, some power supplies are not fully rectified and smoothed. The sensor will reveal the varying d.c. voltage.\u003c\/p\u003e\n\u003cp\u003eThis high impedance Voltage sensor connects via 4 mm plugs or crocodile clips to most school based power supplies and electricity kits.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eBiology\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/chemistry_l2_19-50_compact.jpg?v=1491293318\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eElectric lemons (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-14-18-ebook\" target=\"_blank\"\u003eBiology (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eAn alternative look at the energy in food. In this activity instead of the more traditional burning of food to calculate energy we make electricity.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch5\u003eChemistry \u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/chemistry_l2_19-50_compact.jpg?v=1491293318\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eElectric Lemons (fruit batteries) (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/chemistry-age-11-14-ebook\" target=\"_blank\"\u003eChemistry (11 -14) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eYou may have seen in some novelty shops or catalogues, a potato or lemon powered clock. In this experiment you are going to study the electricity produced by a fruit (or fruits) and see if the voltage you get from the fruit can be altered. Potential for first work into reactivity series.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectric Lemons (fruit batteries) (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/chemistry-14-8-ebook\" target=\"_blank\"\u003eChemistry (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eThis investigation is an indirect approach to studying the reactivity series of metals, a list of metals in order of their ability to react with other elements (normally oxygen and acids). It makes a change from the observational experiments that are usual. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectrode Potentials (microvoltaic cells) (Chemistry (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe advantage of this experiment is that very small quantities of the reagents are required, allowing a wider range of cells to be included including a silver cell.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003e\u003cspan\u003ePhysics\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L2_02-50_a13a38f0-a9f6-4e26-8030-c6e840075744_compact.jpg?v=1491294157\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eElectricity from water power (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-age-11-14-ebook\" target=\"_blank\"\u003ePhysics (11-14) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eUse a simple water wheel to make electricity via generator. Monitor the voltage and or current over time against other variables e.g. flow, fall height etc.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eLight and voltage (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eInvestigations with simple solar cells. Voltage produced, current, effect of light intensity, insolation angle etc. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and voltage in a series circuit (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eThis one of a series of investigations into current in a circuit. This part requires additional lamps and or cells to be added and the changes measured. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBrightness vs. voltage (using sensors) (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eHow is the brightness of a simple filament lamp affected by voltage. Use sensors to plot light intensity against voltage:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eSpecific heat capacity of a liquid (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-electricity-heat-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Electricity \u0026amp; Heat eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eThis investigation will measure the specific heat capacity of a liquid (water). A sample of water of known mass is heated by known number of degrees by an electrical heater. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eElectrical Equivilence Of Heat (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe experiment is very simple and compares the power generated in heating a resistance coil to the heat energy transferred to the water. Measurements are made in Joules to emphasise the transfer of energy. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eStart up current of a lamp (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eHigh speed data logging, making the invisible visible! See how the current, voltage, resistance and power all change at the instant a lamp turns on. Starts to explain why lights only fail at turn on! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eStefan - Boltzmann law. (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe experiment illustrates the Stefan - Boltzmann law. It does not give a value for the Boltzmann constant. A simple tungsten filament automotive lamp is used as the source of thermal radiation. The investigation tests if the radiation is really to the 4th power of temperature. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCalibration of a thermometer (Seebeck effect) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIn the investigation two junctions are used, one is placed in a constantly cold temperature the other has varying temperatures applied to it. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSpecific heat capacity of a solid (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation will measure the specific heat capacity of a solid. A block of metal of known mass is heated by an electrical heater through a known number of degrees. The electrical energy required to create this temperature rise is determined and used to find the specific heat capacity. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhat changes the current in a circuit? (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eSimple (revision) exercise to see how the number of cells in circuit changes the current,\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhat changes the current in a circuit (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eAlternative exercise using snapshot to collect data instead of reading values off a meters screen.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eGood and bad conductors (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis activity is a standard practical comparing current flow with different materials in a circuit. Strips of different conductors and insulators are provided for the pupils. Conductors are anything that let a current flow. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eConnecting resistors (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eShows the current in circuit with different resistor values and combinations. Leads to resistor calculations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and voltage (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIntroductory activity to explore the relationship between current and voltage with an ohmic conductor. In this variant changes in voltage and current are measured against time. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and voltage (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIntroductory activity to explore the relationship between current and voltage with an ohmic conductor. In this variant changes in voltage and current are plotted directly against each other, leading into characteristics of conductors \/ components. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSimple series circuits (lamp resistors) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe effect of a component offering electrical resistance in circuit is revised. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eOhms Law (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eA study of Ohm's law for resistors. Collects data graphically against time to allow the students to change plot to voltage vs current. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eOhms law current vs voltage plot (34a) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eActivity set up to let the software plot voltage vs current directly. Opens the possibility of more investigation of the relationship between voltage and current and the type of resistance. Resistance can also be calculated and plotted.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectrical characteristics (Led, diode) (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eRestricted instructions for voltage current curves for diodes.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eTime constant of a capacitor (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eA good example of data logging enhancing work. collect voltage (and current data, if required) to study time constants and exponential decay. A very good practical. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEnergy stored on a capacitor (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation allows the student to calculate the energy stored in the capacitor, it is an extension of the work started in 37 Charge stored on a capacitor. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eExtension leads (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eWhy do they always tell you to fully unwind an extension lead? a simple investigation to model power loss over long cable runs. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWater from electric (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eIn the experiment the user is asked to investigate the relationship between height of water (the head) and \/ or the flow of the water over a simple turbine. Opportunity for investigation and design\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEfficiency of a transformer (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eSimple experiment to measure volts in and volts out. Data collected can be used to show phase match \/ difference and power in and power out. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eDc characteristic of a diode (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eA more detailed study of diodes than a simple voltage current curve. Students study 1. How does the current change as the voltage across the diode increases? 2. How does the V vs. I characteristic change if the voltage is reversed? 3. When the diode is conducting how does resistance vary. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eAn experimental estimation of Planck's constant (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-light-sound-pressure-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Light, Sound \u0026amp; Pressure eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eUses LEDs of known frequency and measures the forward voltage for first illumination. A plot of turn on voltage vs wavelength leads to an estimate of the constant.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWaves and superposition (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation allows the students to collect waves generated by a signal generator and use the tools in the EASYSENSE software to add them and see the effects of superposition. This can be complex idea for many students and the ability to use real data and waves gives an alternative learning path. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_02-50_293ec6c1-b696-481d-83d4-db06864dd5cb_compact.jpg?v=1491294691\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eWhy do bulbs blow (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis activity uses this familiar event to introduce the idea of power surges and to calculate resistance changes. It is a practical introduction to the relationship between voltage and current and the problem of correctly fusing devices in a home for safety.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMp3 (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this activity the role of the number of samples in collected data is considered using the problem of sound quality in MP3 players as the stimulus. The change in the information in the data files created is easily seen. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectric from sunlight (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation you will take a small solar panel and investigate how much light is needed to make electricity. The quantity of electricity produced will be measured as its voltage. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhy is electric ac (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eThis experiment tries to show why it is that the electricity supply is created as an alternating current (AC).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":16749814404,"sku":"3160-12","price":557.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/8782596214_23c140d773_z_grande_grande_31ea76b1-bf28-4066-ab67-b3f56c09eee6.jpg?v=1491292720"},{"product_id":"voltage-differential-1v","title":"Voltage - Differential 1V","description":"\u003ch3\u003eMonitor voltage over a fast short or long slow period of time in addition to spot measurements. \u003c\/h3\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/9CB9-lFBEUk\" height=\"141\" width=\"250\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 20-sec Induction magnet in a coil\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/SBLjdWSv8o0\" height=\"141\" width=\"250\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e53-sec capacitor - charge \u0026amp; discharge\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/farm8.staticflickr.com\/7445\/15749022714_8c8bc9ff01_m_d.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv\u003eTeaching applications:\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eInduction of voltage and current in conductors\u003c\/li\u003e\n\u003cli\u003eOhm’s law\u003c\/li\u003e\n\u003cli\u003eStudy of LEDs and Diodes and transistors\u003c\/li\u003e\n\u003cli\u003eCurrent from small solar cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eExtension and advanced ideas:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInduction of voltage in a coil\u003c\/li\u003e\n\u003cli\u003eElectrical characteristics of low current components\u003c\/li\u003e\n\u003cli\u003eVoltage and homemade sensors\u003c\/li\u003e\n\u003cli\u003eDynamo effect\u003c\/li\u003e\n\u003cli\u003eTime constant, charge discharge of a capacitor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3160_ds021_6_voltage.pdf\" download\u003eDownload\u003c\/a\u003e Voltage Sensor Manual  Doc No.: DS021 | Issue: 6\u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c4b4b4\u0026amp;d=3160_ds021_6_voltage\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eContents\/Details: \u003c\/h3\u003e\n\u003cdiv id=\"editable-additional-info\" class=\"product-additional-info\"\u003e±1 V (Resolution 1 mV) \u003cbr\u003eMaximum Voltage ±10 V, Impedance 1 Meg ohm\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVoltage sensors measure the potential difference between the ends of an electrical component and are connected in parallel. They can be used to measure both DC and low-voltage AC circuits. They should never be used with high voltages or household AC. The 4 mm plugs attach to most standard school’s electronics kits and power supplies.\u003c\/p\u003e\n\u003cp\u003eA Voltage Sensor can be used in conjunction with a Current Sensor. Batteries are the first choice as the source of energy. An alternative is to use a fully isolated mains power supply with a regulated DC output (smoothed and fully rectified).\u003c\/p\u003e\n\u003cp\u003eBe aware that some power supplies are ½ wave rectified producing an average rather than true DC, this sensor will ‘pick up’ the fluctuations in voltage and current from this type of power supply. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eChemistry\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/chemistry_l3_07-50_compact.jpg?v=1491290561\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eMixed halides - potentiometric titration (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/chemistry-14-8-ebook\" target=\"_blank\"\u003eChemistry (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eFinding the solubility product of silver halides using half cells and change in half cell voltage as ions are precipitated out by titration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003ePhysics\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L2_03-50_compact.jpg?v=1491290664\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eVolts from wind (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-age-11-14-ebook\" target=\"_blank\"\u003ePhysics (11-14) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eWind turbines have been part of the fabric of life for many thousands of years. It is only in the last, make test and experiment with model turbines. Monitor voltage and current against other variables e.g. wind speed, blade size, blade angle etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInduction of electricity In a coil (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eThis activity is a simple demonstration of Faraday's experiments into induction. In this case we are merely demonstrating that a voltage is created when a magnet moves into and out of a coil. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eInduction in a coiled conductor (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-electricity-heat-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Electricity \u0026amp; Heat eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003etake a long enough conductor, coil it round and you can get a good induced current \/ voltage. Classic magnet through a coil activity, but with a subtle twist.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eMagnet spinning in a coil (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe experiment is modelling the action of a small permanent magnet alternator, such as a bicycle dynamo. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience in Sport\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-in-S_104-50_compact.jpg?v=1491291507\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eFinding the end (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-in-sport-age-11-18-ebook\" target=\"_blank\"\u003eScience in Sport (11-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eWith events that have long time bases e.g. marathons, timing can become a problem. Keeping a laser beam across a running track for many hours would seriously disrupt other events taking place. the activity looks at the technology behind RFid tagging .\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_23-50_compact.jpg?v=1491291690\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eVolts from wind (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis is an open ended investigation with several objectives in mind, 1. Introducing the idea of wind power as an alternative energy source. 2. The idea of iterative design to get the most efficient turbine. 3. The social impact of wind turbines. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhy is electric ac (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eThis experiment tries to show why it is that the electricity supply is created as an alternating current (AC). \u003c\/span\u003e\u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":16749888900,"sku":"3162","price":557.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/8782596214_23c140d773_z_grande_52e47c2a-9d7e-4cd8-a106-248b616faf15.jpg?v=1491292597"},{"product_id":"carbon-dioxide-sensor","title":"Carbon Dioxide Sensor","description":"\u003ch2\u003eThe sensor is designed and optimised to measure carbon dioxide levels found in the air around photosynthesising plants and small, respiring animals. \u003c\/h2\u003e\n\u003cp\u003eThe unique disc shape lets the sensor become the lid for respiration chambers or placed on a desk without the need for clamps and stands.\u003c\/p\u003e\n\u003cp\u003eTwo ranges:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eone for detailed work on respiration, environment monitoring and respiration,\u003c\/li\u003e\n\u003cli\u003ethe other for quantitative work on CO2 levels at high levels. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm4.staticflickr.com\/3681\/13582473374_797f3ff093_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-7\"\u003e\n\u003cp\u003eTeaching applications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCO2 levels around a photosynthesising plant\u003c\/li\u003e\n\u003cli\u003eDemonstrating the density of CO2\u003c\/li\u003e\n\u003cli\u003eRespiration in small animals (e.g. insect larvae) at different temperatures\u003c\/li\u003e\n\u003cli\u003eAir quality - monitoring CO2\u003c\/li\u003e\n\u003cli\u003eCellular respiration of germinating seeds e.g. peas or beans\u003c\/li\u003e\n\u003cli\u003eCO2 level of expired air inspired air\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm3.staticflickr.com\/2819\/13776664603_76dae55050_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-7\"\u003e\n\u003cdiv\u003eExtension and advanced ideas:\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eEmissions from vehicle exhausts\u003c\/li\u003e\n\u003cli\u003eCO2 in composting\u003c\/li\u003e\n\u003cli\u003eElevated CO2 in exercising and post exercise individuals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003ca download=\"\" href=\"https:\/\/store.data-harvest.co.uk\/download\/3152_ds078_5_carbon_dioxide.pdf\"\u003eDownload\u003c\/a\u003e\u003cspan\u003e Carbon Dioxide Sensor Manual  \u003c\/span\u003e\u003cspan\u003eDoc No.: ds078 | Issue: 5\u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23fcf4f4\u0026amp;d=3152_ds078_5_carbon_dioxide\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e Unique shape allows the unit to form a lid for beakers and conical flasks.\u003c\/li\u003e\n\u003cli\u003eThe compact design of the sensor uses absorbance of infra red energy by CO2 to measure levels.\u003c\/li\u003e\n\u003cli\u003eProvision for pH, conductivity, Oxygen electrode and temperature sensors to pass through sensor body.\u003c\/li\u003e\n\u003cli\u003eRanges make it unsuitable for measurement of CO2 from reactions, the yield form these reactions will quickly overwhelm the sensor limits.\u003c\/li\u003e\n\u003cli\u003eM6 threaded support point, mounting rod included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cdiv id=\"editable-additional-info\" class=\"product-additional-info\"\u003e\n\u003cp\u003e0 to 10,000 ppm, 0 to 100,000 ppm\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eBiology\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/biology_l3_66-50_compact.jpg?v=1494088484\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eMeasuring changes in CO2 around a plant (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-14-18-ebook\" target=\"_blank\"\u003eBiology (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe investigation uses a Carbon dioxide sensor to monitor the changes in carbon dioxide around a plant. You should easily see a strong relationship between light and CO2. Uses a whole living plant. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMeasuring CO2 in a room (why do I yawn?) (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003ePerhaps the answer to why does everyone start yawning at the same time! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMeasuring CO2 in the environment (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eThere is a lot of concern at present about the impact of carbon dioxide levels in the atmosphere and how it will affect the climate. What is less obvious to many people is what levels of carbon dioxide are present in their immediate surroundings.Here is an activity to see what is present and how it varies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":31590385800,"sku":"3152","price":3058.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/co2-sensor-beaker.jpg?v=1616257504"},{"product_id":"light-level","title":"Light level sensor (multi-range)","description":"\u003ch2\u003e\u003cspan\u003eA light sensor that is balanced to the human eye spectral response.\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e5 ranges to cover 0 -100,000 lx and a transmission range for home made colorimeters. One of the essential sensors for data logging.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"250\" height=\"141\" src=\"https:\/\/www.youtube.com\/embed\/9dbKe3yJNDU\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 42-second  Light sensor 1,000 lux slow\u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/farm3.staticflickr.com\/2805\/13891590644_9a11daaa90_m_d.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-7\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eTeaching applications:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eInverse square law\u003c\/li\u003e\n\u003cli\u003eStart up current of light bulb\u003c\/li\u003e\n\u003cli\u003ea.c. and d.c. lighting\u003c\/li\u003e\n\u003cli\u003eReflections\u003c\/li\u003e\n\u003cli\u003eColorimetry\u003c\/li\u003e\n\u003cli\u003ePhotosynthesis and light intensity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/farm4.staticflickr.com\/3819\/10740474844_eb3e9e45b4_m_d.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-7\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eExtension and advanced ideas:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eVariation of light intensity in young’s slit diffraction\u003c\/li\u003e\n\u003cli\u003eHours of daylight\u003c\/li\u003e\n\u003cli\u003eIncident light vs. season \/ angle\u003c\/li\u003e\n\u003cli\u003ePolarizers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eMore info:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cli\u003e0 -1,000 Lx suitable for interior and lab lighting work.\u003c\/li\u003e\n\u003cli\u003e0 -10K Lx Suitable for strong local light sources e.g. bench lamps.\u003c\/li\u003e\n\u003cli\u003e0 – 100K Lx Suitable for most outside light\u003c\/li\u003e\n\u003cli\u003e0 – 1000 Lx Fast for low light sources where intensity is changing rapidly\u003c\/li\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3124_ds099_2_multirange_light_sensor.pdf\" download\u003eDownload\u003c\/a\u003e Multi-range Light Level   \u003cspan\u003eDoc No.: DS099 | Issue: 2\u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe allowfullscreen=\"true\" style=\"border:none;width:100%;height:326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23bcbcbc\u0026amp;d=3124_ds099_2_multirange_light_sensor\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\"\u003e\u003c\/iframe\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cdiv class=\"product-additional-info\" id=\"editable-additional-info\"\u003e\n\u003cp\u003e0 to 1,000 Lux (Resolution 1 Lux)\u003cbr\u003e0 to 10,000 Lux (Resolution 5 Lux)\u003cbr\u003e0 to 100,000 Lux (Resolution 43 Lux)\u003cbr\u003e0 to 1,000 Lux fast response (Resolution 1 Lux)\u003cbr\u003e0 to 110% Transmission\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch5\u003e Biology\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/biology_l2_09-50_compact.jpg?v=1493955888\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eUse pH to monitor photosynthesis (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-11-14-ebook\" target=\"_blank\"\u003eBiology (11-14) ebook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eMeasure the changes in light and carbon dioxide (indirectly via pH change) over longer time periods to show how light drives photosynthesis and carbon dioxide use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003ePlant growth (Biology (11-14) ebook)\u003c\/strong\u003e\u003cbr\u003ePhotosynthesis produces the food for plant growth, If this is true then a plant in good light will show growth. The worksheet outlines a method to measure plant growth as an increase in height over time. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMonitoring the environmnet (Biology (11-14) ebook)\u003c\/strong\u003e\u003cbr\u003eData loggers are an excellent silent witness. Let you imagination flow and set up a 24 hour or longer monitor of an environment. Do birds really sing when it gets light? Is the dead of night really silent? When is the hottest time of day? An outline method and advice for setting up a long term monitor. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEnzyme reaction (Amylase) (Biology (11-14) ebook)\u003c\/strong\u003e\u003cbr\u003eA data logging version of the classic amylase and starch study of enzyme action. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003ePlant growth (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-14-18-ebook\" target=\"_blank\"\u003eBiology (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eWe teach the idea that photosynthesis powers a plants growth and development, but plant growth is too slow for the pace of modern teaching. Using a data logger allows you to monitor changes over the longer time that is required to see any growth. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMonitor an environment (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eUse a data logger to record the changes in a location over an extended time. Choice of sensors is up to the user, obvious sensors to use would be humidity, temperature, light and sound. Study when birds start singing - at dawn or just before, when is it coldest? is it darkest before the dawn?\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eLight and photosynthesis (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eUse a light sensor and a pH sensor to measure changes in photosynthetic activity in pondweed over a time. The pH measures CO2 indirectly as changes in acidity due to changes in dissolved CO2 \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003ePhotosynthesis and Respiration (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eMeasures changes in Oxygen, CO2 and light around pondweed. Shows that changes in CO2 are linked to changes in light and oxygen, connecting respiration (use of Oxygen, production of CO2) to photosynthesis (use of CO2, production of \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eDiurnal variations In tree trunk (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eUses a force, light and temperature sensors to measure the effect of transpiration and photosynthesis on the trunk circumference of a tree in leaf. Excellent for data analysis exercise \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eEnzyme studies with a light sensor (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eAn alternative to a colorimeter to follow an enzyme reaction. Uses a light sensor on the transmittance range. Written for the amylase reaction but would work for the casein reaction as well.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eMeasuring changes in CO2 around a plant (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eThe investigation uses a Carbon dioxide sensor to monitor the changes in carbon dioxide around a plant. You should easily see a strong relationship between light and CO2. Uses a whole living plant. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003ePhysics\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L2_04-50_compact.jpg?v=1493956102\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003cstrong\u003eLight and voltage (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-age-11-14-ebook\" target=\"_blank\"\u003ePhysics (11-14) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eInvestigations with simple solar cells. Voltage produced, current, effect of light intensity, insolation angle etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHot water from sun (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eThis is an open ended investigation that allows the students to make and develop a simple solar water \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCan lamp brightness be used to measure current? (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eThis activity involves pupils thinking in detail about the relationship between brightness and current. It makes use of a Current and Light Level sensor to test a qualitative method of measuring current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eReflections (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eFollowing rays through glass blocks or across benches is standard school optics. Here we consider the reflectivity of materials.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBrightness vs. distance (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eHow does light intensity change with distance? can we predict the intensity at a distance? is there a law governing the diminishment of light with distance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBrightness of a lamp and voltage (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eHow does the voltage affect the brightness of simple filament lamp.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBrightness vs. voltage (using sensors) (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eHow is the brightness of a simple filament lamp affected by voltage. Use sensors to plot light intensity against voltage:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHow is power available affected by length of cable \/ wire? (Physics (11-14) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation, students are asked to investigate what happens to the brightness of a lamp as the wires connecting it back to the power source are increased in length. It is modelling voltage and power losses in long cable runs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eVoltage and brightness (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-electricity-heat-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Electricity \u0026amp; Heat eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eA revision of the basic concepts of electricity. e.g. difference between voltage and current \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eCurrent and brightness In a circuit (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis activity involves pupils thinking in detail about the relationship between brightness and current. Good opportunity to remind about the difference between voltage and current.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eStart up current of a lamp (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eHigh speed data logging, making the invisible visible! See how the current, voltage, resistance and power all change at the instant a lamp turns on. Starts to explain why lights only fail at turn on! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eExtension leads (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eWhy do they always tell you to fully unwind an extension lead? a simple investigation to model power loss over long cable runs. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eReflectivity (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-light-sound-pressure-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Light, Sound \u0026amp; Pressure eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eIn this investigation a ‘reflection index’ is created for different materials against a shiny piece of aluminum foil which will be used as the ‘best’ reflector and will become the standard. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHow does light intensity vary with distance (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eOn the surface a simple light vs. distance exercise, but is also an illustration of inverse square and estimation of star distances.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003ePolarising sunglasses (a study of polarisation of light) (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eUses how polarised sun glassses reduce sparkle to investigate the polorisation of light. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSingle slit interference of light (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eBy using a data logger for the measurement of fringes you can collect information about the intensity of the light vs. distance as well as the more normal distance between fringes data. This will reveal another level of information and give a boost to classic practical.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eYoung's double slit experiment - a new twist (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eNormally the spacing between fringes is measured to back calculate either the light frequency or the slit separation. Using a data logger and light sensor we can reveal detail about the intensity of the fringes and the pattern of the fringes. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInfra red in the spectrum (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eUse a light sensor and infra red sensor to reveal the wider spectrum.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eFast Light (Physics (14-18) : Light, Sound \u0026amp; Pressure eBook)\u003c\/strong\u003e\u003cbr\u003eMake a fast recordings of the output from a set of light sources. Use tools in the software to determine frequency of light source. Look at the waveform of the varying light to reveal information about the light source.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e Science in Sport\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-in-S_407-50_compact.jpg?v=1493991127\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003ePolarising sunglasses (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-in-sport-age-11-18-ebook\" target=\"_blank\"\u003eScience in Sport (11-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eLooking at how sunglasses and anti glare glasses work. can help the user make more informed choices about the most appropriate equipment and how to get the best from it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInfra red and sunlight (Science in Sport (11-18) eBook)\u003c\/strong\u003e\u003cbr\u003eA little light relief. Why can they light the olympic torch from sunlight on mount olympus?\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_02-50_60ae425c-1873-46bb-ac09-531cf8d1bbe1_compact.jpg?v=1493991195\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eWhy do bulbs blow (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis activity uses this familiar event to introduce the idea of power surges and to calculate resistance changes. It is a practical introduction to the relationship between voltage and current and the problem of correctly fusing devices in a home for safety.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eExtension leads (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation, students are asked to investigate what happens to the brightness of a bulb as the wires connecting it back to the power source are increased in length. Do you understand why you should always uncoil an extension lead?.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eElectric from sunlight (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eIn this investigation you will take a small solar panel and investigate how much light is needed to make electricity. The quantity of electricity produced will be measured as its voltage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSolar waterboilers (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eThis is an open ended investigation that allows the students to make and develop a simple solar water heater. It is not anticipated that a complex heater will be created; indeed they do not need to be very complex.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003ePolarising sunglasses (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eWhy do polarised sunglasses reduce sparkle and glare\u003c\/span\u003e\u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":31590924680,"sku":"3124","price":788.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/8756922607_3f6e2d2066_z.jpg?v=1675690523"},{"product_id":"infrared-sensor","title":"Infrared Sensor","description":"\u003ch3\u003eThe Infrared sensor adds another dimension to heat loss and energy transfer experiments.  \u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/6p8_1T8VwJk\" height=\"141\" allowfullscreen=\"\" frameborder=\"0\" dth=\"250\" wi=\"\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 2-minute - Earthquake Rescue\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/D1PJQMXYiH8\" height=\"141\" width=\"250\" allowfullscreen=\"\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003cbr\u003e 40-sec - Infrared sensor - Leslie's cube\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eMultiple ranges to cover a wide range of energy sources. Includes silica glass filter to block mid and far infrared making the sensor selective for low and high temperature sources. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm4.staticflickr.com\/3809\/13577093253_9e66520525_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eTeaching applications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eHerschel’s discovery of infrared experiment\u003c\/li\u003e\n\u003cli\u003eStudy inverse square to verify that heat radiation from source is inversely proportional to the square of its distance\u003c\/li\u003e\n\u003cli\u003eInfrared emission from a Leslie’s cube\u003c\/li\u003e\n\u003cli\u003eEfficiency of insulation such as clothing or building materials\u003c\/li\u003e\n\u003cli\u003eInfrared in the environment\u003c\/li\u003e\n\u003cli\u003eExplaining infrared thermography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-4\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/farm4.staticflickr.com\/3695\/13760758775_95a20f489d_m_d.jpg\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-8\"\u003e\n\u003cdiv\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eExtension and advanced ideas:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eBlack body studies (radiance range)\u003c\/li\u003e\n\u003cli\u003eInvestigating Stefan-Boltzmann’s radiation law using a tungsten filament lamp\u003c\/li\u003e\n\u003cli\u003eModelling infrared discovery of people in disaster zones\u003c\/li\u003e\n\u003cli\u003eHeat distribution along a heated metal rod\u003c\/li\u003e\n\u003cli\u003eIllustration of non-contact thermometry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3278_ds056_4_infrared.pdf\" download=\"\"\u003eDownload\u003c\/a\u003e\u003cspan\u003e Infrared Sensor Manual \u003c\/span\u003e\u003cspan\u003eDoc No.: DS056 | Issue: 4\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c0b8b8\u0026amp;d=3278_ds056_4_infrared\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSensor Ranges:\u003c\/h3\u003e\n\u003ctable id=\"techspec\" class=\"table table-bordered\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRange Name\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIrradiance\u003c\/td\u003e\n\u003ctd\u003e0 to 200 W\/m²\u003c\/td\u003e\n\u003ctd\u003e0.1 W\/m²\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRadiance\u003c\/td\u003e\n\u003ctd\u003e0 to 30 W\/m²sr-1\u003c\/td\u003e\n\u003ctd\u003e0.02 W\/m²sr-1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIrradiance\u003c\/td\u003e\n\u003ctd\u003e0 to 20 W\/m²\u003c\/td\u003e\n\u003ctd\u003e0.01 W\/m²\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIrradiance\u003c\/td\u003e\n\u003ctd\u003e0 to 2,000 W\/m²\u003c\/td\u003e\n\u003ctd\u003e1 W\/m²\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRadiance\u003c\/td\u003e\n\u003ctd\u003e0 to 30 W\/m²sr-1\u003c\/td\u003e\n\u003ctd\u003e2 W\/m²sr-1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRadiance\u003c\/td\u003e\n\u003ctd\u003e0 to 30 W\/m²sr-1\u003c\/td\u003e\n\u003ctd\u003e0.2 W\/m²sr-1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eContents\/Details:\u003c\/h3\u003e\n\u003cdiv id=\"editable-additional-info\" class=\"product-additional-info\"\u003e0 to 30 W\/m2 sr-1 (Resolution: 0.02 W\/m2 sr-1)\u003cbr\u003e0 to 300 W\/m2 sr-1 (Resolution: 0.2 W\/m2 sr-1)\u003cbr\u003e0 to 3000 W\/m2 sr-1 (Resolution: 2 W\/m2 sr-1)\u003cbr\u003e0 to 20 W\/m2 (Resolution: 0.01 W\/m2)\u003cbr\u003e0 to 200 W\/m2 (Resolution: 0.1 W\/m2)\u003cbr\u003e0 to 2000 W\/m2 (Resolution: 1 W\/m2)\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe detector window is made from KBr (potassium bromide), which is transparent to energy sources radiating in the wavelength region from 0.23 microns (230 nm) to 40 microns (40,000 nm) i.e. ultraviolet through to the far infrared portion of the spectrum. KBr (potassium bromide) is hygroscopic so store the sensor in dry conditions.\u003c\/p\u003e\n\u003cp\u003eMeasurements can be recorded at three levels using either a Radiance (the intensity of the emitted thermal energy of the source) or Irradiance (the intensity of the incident thermal radiation on the Sensor) range.\u003c\/p\u003e\n\u003cp\u003eThe silica glass detachable filter allows visible and near infrared to pass i.e. 0.15 to 4 microns but will block out mid and far infrared.\u003c\/p\u003e\n\u003cp\u003eWavelength region Without filter 0.23 - 40 microns With filter 0.23 - 4 microns\u003c\/p\u003e\n\u003ch5\u003eBiology\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/biology_l2_13-50_compact.jpg?v=1491128667\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eInfrared face imaging (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-11-14-ebook\" target=\"_blank\"\u003eBiology (11-14) ebook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis is a fun way of introducing the the concept of medical imaging and non contact thermometers. Make your own thermal selfies.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHot Stuff (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/biology-age-14-18-ebook\" target=\"_blank\"\u003eBiology (14-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eA fun way of introducing medical imaging and infra red non contact thermometers. Students create a colour key and a false colour heat map of their face. \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eFinger Prints (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003einfra red is an important tool in modern biology and medical science. This activity introduces the infra red sensor by looking for heat traces after touching surfaces. Many animals also detect infra red to determine size and position of prey. Can be used to illustrate the advantage this has for a predator. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBodies in the Rubble (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eIn the early stages of a natural disaster there is a lot of effort placed into finding survivors who have been buried in the rubble of collapsed buildings. This is an activity to model how infra red technology is used to find survivors. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eTemperature vs. Infra red (Biology (14-18) eBook)\u003c\/strong\u003e\u003cbr\u003eNon contact thermometers are frequently used by medical personnel. This activity shows how the link between temperature and infra red is made. Students can make their own thermometer from the infra red sensor. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003ePhysics\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_E-H_06-50_compact.jpg?v=1491143314\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eLeslie's cube (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-electricity-heat-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Electricity \u0026amp; Heat eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eThe Scottish scientist Leslie studied how the loss of energy from a surface was influenced by the texture and colour of the surface. Anecdotal evidence suggests that dark clothing makes you feel hotter in summer. Is there any supportive science for this belief? \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eTemperature Vs Infra red (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003ehow does the infra red emitted from a hot body relate to the temperature? can you make a non contact thermometer? \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eWhat type of surface absorbs radiant energy? (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis investigation encourages the student to think about how surfaces absorb and re-radiate heat energy. Many students hold the belief that a white surface will absorb and radiate the least heat. In the investigation, this assumption is challenged and tested. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eResidual heat: Thermal imaging. (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eInfrared energy is emitted from any object that contains heat. In this investigation we build on the experiences of many students with a non contact thermometer and pictures of modern weapons attacks to think about how infrared imaging works.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eSurvivors In the rubble (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis experiment is designed to illustrate the principles of the devices used by the emergency services. The device will not show the outline of the hidden object, perhaps with a carefully drawn grid and snapshot measurement a “thermal contour” map could be created? \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHot Stuff: Thermal map of your face (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThis is quite a fun way of introducing the Infrared sensor and hidden part of the spectrum to the students. Create your own thermal selfie. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eStefan - Boltzmann law. (Physics (14-18) : Electricity \u0026amp; Heat eBook)\u003c\/strong\u003e\u003cbr\u003eThe experiment illustrates the Stefan - Boltzmann law. It does not give a value for the Boltzmann constant. A simple tungsten filament automotive lamp is used as the source of thermal radiation. The investigation tests if the radiation is really to the 4th power of temperature.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eInfra red in the spectrum (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/physics-light-sound-pressure-age-14-18-ebook\" target=\"_blank\"\u003ePhysics (14-18) : Light, Sound \u0026amp; Pressure eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eUse a light sensor and infra red sensor to reveal the wider spectrum. \u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e Science in Sport\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-in-S_402-50_compact.jpg?v=1491143835\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHot stuff mapping (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-in-sport-age-11-18-ebook\" target=\"_blank\"\u003eScience in Sport (11-18) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eControlling heat in sport is important, Thermal imaging can help to design heat loss into clothing or to reduce heat loss as required. A demonstration model to show how thermal imaging works.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eThe right clothes for the right sport (Science in Sport (11-18) eBook)\u003c\/strong\u003e\u003cbr\u003eThe Scottish scientist Leslie studied how the loss of energy from a surface was influenced by the texture and colour of the surface. Anecdotal evidence suggests that dark clothing makes you feel hotter in summer because it absorbed the suns’ heat . But is sports clothing more about function or etiquette? \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eInfra red and sunlight (Science in Sport (11-18) eBook)\u003c\/strong\u003e\u003cbr\u003eA little light relief. Why can they light the olympic torch from sunlight on mount olympus? \u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 style=\"text-align: left;\"\u003e\u003cspan\u003eScience at Work\u003c\/span\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/Physics_L3_S-at-W_10-50_compact.jpg?v=1491144054\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eShould i wear light coloured clothes in the summer to keep me cool? (\u003ca href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/science-at-work-age-11-16-ebook\" target=\"_blank\"\u003eScience At Work (11-16) eBook\u003c\/a\u003e)\u003c\/strong\u003e\u003cbr\u003eA study into colour and heat gain and loss. An old argument studied, white cotton keeps me cool in the summer, but why does black clothing not keep me hot in the winter? \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHow does infra red and temperature link? (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003emake a non contact thermometer from an infra red sensor\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eFinger prints (persistence of heat images) (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eFind out where your fingers have been using an infra red sensor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eHot Stuff (thermal mapping of your face) (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eThis is quite a fun way of introducing the Infrared sensor and hidden part of the spectrum to the students. Most students will not have experienced how infrared works, they may have seen the result of infrared imaging. Make your own infra red selfie \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cstrong\u003eBodies in rubble (infra red to find survivors) (Science At Work (11-16) eBook)\u003c\/strong\u003e\u003cbr\u003eThis experiment is designed to illustrate the principles of the devices used by the emergency services. The device will not show the outline of the hidden object, perhaps with a carefully drawn grid and snapshot measurement a “thermal contour” map could be constructed.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"body-right-col\" class=\"pull-right\"\u003e\n\u003cdiv class=\"cart-box\"\u003e\n\u003cdiv class=\"product-page-code\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":31645423496,"sku":"3278","price":1463.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/8783774132_e6a392b89c_z.jpg?v=1675690589"},{"product_id":"vu-timing-ramp-set","title":"Vu Timing Ramp Set","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis exciting addition to the Vu data logger gives a low cost complete solution to allow students to study time, speed and the effect of friction. The whole class can be involved in active and engaging practical experiments.\u003c\/p\u003e\n\u003cp\u003eNote: Vu data logger required. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/eACSoQYwplM?si=TuPWc923-jC-ZcEL\" height=\"315\" width=\"560\" allowfullscreen=\"\" referrerpolicy=\"strict-origin-when-cross-origin\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eInvestigate Friction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Vu Timing Ramp features changeable surfaces that allow students to investigate the effects of different frictional surfaces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/surfaces.jpg?v=1712223922\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/height-adjustable-ramp.jpg?v=1712223945\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eInvestigate Heights\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAdjust the height of the slope to investigate the effect of changing the height, does the car go faster or slower? What happens when you add friction?\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eRepeatable results\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Vu Timing Ramp Set is supplied with two magnet proximity switch sensors and a magnet is attached to the underside of the cart to ensure accurate readings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/cart-in-action.jpg?v=1712223968\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"table table-sm table-hover\" id=\"feat-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTrack and Cart Material\u003c\/th\u003e\n\u003ctd\u003eMDF Wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSensor Type\u003c\/th\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eWhat's in the box\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"table table-sm table-hover\" id=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1x 1m Wooden Ramp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1x 4 Position Slope Stand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4x Different Surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1x Wooden Car\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2x Magnetic Proximity Switches \u0026amp; Magnet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct Manual\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23e4c49c\u0026amp;d=3841___2341_ds108_3_switch_kit_for_timing_ramp\u0026amp;hideIssuuLogo=true\u0026amp;pageLayout=singlePage\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35487938376,"sku":"2340","price":1600.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/cart-in-action.jpg?v=1615613664"},{"product_id":"2-x-vu-light-gates","title":"Vu + Light Gate (pack of 2)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSupplied in a pack of two, these light gates are designed to be triggered like a switch by passing an object between each gate making them ideal for timing experiments.\u003c\/p\u003e\n\u003cp\u003eNote: Vu+ data logger required.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-7\"\u003e\n\u003cp\u003e\u003cstrong\u003eMultiple Timing Experiments \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLight Gates can be used for dynamics experiments that involve calculating time and speed.\u003c\/p\u003e\n\u003cp\u003eA single Light gate can be used to measure time and speed at A or use a pair of Light gates to measure time and speed from point A to point B.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-5\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/vu-plus-primary-data-logger-buttons.png?v=1712222610\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"feat-table\" class=\"table table-sm table-hover\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eInfrared source\u003c\/th\u003e\n\u003ctd\u003ePeak at 880 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eResponse time\u003c\/th\u003e\n\u003ctd\u003eLess than 5 microseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTiming resolution\u003c\/th\u003e\n\u003ctd\u003e10 µs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eWhat's in the box\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"spec-table\" class=\"table table-sm table-hover\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 x Vu+ Light Gates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 x Sensor Leads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct Manual\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c7c7b2\u0026amp;d=2330_ds123_2_vu_light_gates\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35488522312,"sku":"2330PK","price":735.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/12284544015_9186dfd015_z.jpg?v=1493915307"},{"product_id":"vu-heart-rate-sensor","title":"Vu Heart Rate Sensor","description":"\u003ch2\u003e\u003cspan\u003ePupils of all ages are keenly interested in how physical and mental stress affects their heart rate. \u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eSupplied with an ear\/thumb sensor and Heart Rate Sensor Adaptor, students can learn how physical and mental stress affects their heart rate.\u003c\/p\u003e\n\u003cp\u003eNote: Vu+ data logger required \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/-VzlqumbgtE?si=LGr6uJvNKohBdtnT\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eMeasuring Heart Rates: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Heart Rate sensor sensing clip (pleth) holds an infrared LED that shines a light through either a finger or ear lobe onto a light sensitive detector. As the amount of light transmitted varies with the flow of blood, the sensor can record either blood flow (heart waveform), or heart rate (beats per minute).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/vu-heartrate-children-c.jpg?v=1712148463\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/vu-heartrate-children-a.jpg?v=1712148569\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003ePractical Investigations:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse the Vu heart Rate Sensor to investigate a number of scientific experiments such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeart rate changes due to activity\u003c\/li\u003e \n\u003cli\u003eRecovery rate\u003c\/li\u003e\n\u003cli\u003ePulse rate\u003c\/li\u003e\n\u003cli\u003eEffect of food (chocolate) or mild stimulants (caffeine)\u003c\/li\u003e\n\u003cli\u003eRemote logging set up from the computer\u003c\/li\u003e\n\u003cli\u003eEffect of music on pulse rate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWorks best if the test subject keeps the finger with the sensing clip absolutely still.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct Manual\u003c\/h5\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca download=\"\" href=\"https:\/\/store.data-harvest.co.uk\/download\/2327_ds127%20_2_Vu_heart_rate_sensor.pdf\"\u003eDownloads\u003c\/a\u003e VU Heart Rate Sensor Manual Doc No.: DS127 | Issue: 2\u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23949494\u0026amp;d=2327_ds127__2_vu_heart_rate_sensor\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35489488840,"sku":"2327","price":546.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/vu-heartrate-children-c.jpg?v=1616305712"},{"product_id":"2-x-vu-push-button-switches","title":"Vu+ Push Button Switches (pack of 2)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSupplied in a pack of two, these push button switches are d\u003cstrong\u003eesigned to be used in timing experiments such as reaction times, counting and measuring speed.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNote: Vu+ data logger required.    \u003c\/p\u003e \n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Switches\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe push buttons are digital switch-type sensors that have two states, ON and OFF, these are push-to-make switches fitted with a red LED to give a visual indication of the switch's state.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/push-switches-1000.png?v=1712221799\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/push-switch-child-1.png?v=1712221818\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003ePractical Investigations \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse the Vu+ Push Button Switches to investigate a number of scientific experiments such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReaction Time Game\u003c\/li\u003e\n\u003cli\u003eCounting objects (traffic, people, animals, etc.)\u003c\/li\u003e\n\u003cli\u003eMeasure speed (cars, people, etc.)\u003c\/li\u003e\n\u003cli\u003eRecord the differences in time taken to walk, run or hop over the same distance.\u003c\/li\u003e\n\u003cli\u003eRecord the time taken by a vehicle to pass from one point to another\u003c\/li\u003e\n\u003cli\u003eIntroducing the idea of the computer acting as a stopwatch e.g. starting and stopping timing.\u003c\/li\u003e\n\u003cli\u003eIntroducing the fact that speed can be calculated directly if the distance between the start and finish line is used\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"feat-table\" class=\"table table-sm table-hover\" style=\"height: 57px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth scope=\"row\" style=\"height: 19px; width: 243.125px;\"\u003eInfrared source\u003c\/th\u003e\n\u003ctd style=\"height: 19px; width: 326.875px;\"\u003ePeak at 880 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth scope=\"row\" style=\"height: 19px; width: 243.125px;\"\u003eResponse time\u003c\/th\u003e\n\u003ctd style=\"height: 19px; width: 326.875px;\"\u003eLess than 5 microseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth scope=\"row\" style=\"height: 19px; width: 243.125px;\"\u003eTiming resolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eWhat's in the box\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"spec-table\" class=\"table table-sm table-hover\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 x Vu+ Push Switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 x Sensor Leads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct Manual\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23bcbcbc\u0026amp;d=2331_ds122_2_vu_push_button_reaction_switches\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35491226184,"sku":"2331PK","price":525.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/push-switch-child-1.png?v=1616306142"},{"product_id":"2-x-vu-timing-mats","title":"Vu+ Timing Mats (pack of 2)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSupplied in a pack of two, these large timing mats are designed to be used in timing experiments that are activated by stepping onto them.\u003c\/p\u003e\n\u003cp\u003eNote: Vu+ data logger required.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eHops, Skips \u0026amp; Jumps\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe timing mats are digital switch-type sensors that have two states, ON and OFF, these are push-to-make switches where one mat is used to start the timer, the other to stop the timer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/jumps.jpg?v=1712223176\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/IMG_6777-2_20copy.jpg?v=1712223195\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003ePractical Investigations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse the Vu+ Timing Mats to investigate a number of scientific experiments such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHow long can I stay in the air when I jump?\u003c\/li\u003e\n\u003cli\u003eHow fast can I hop, walk, and run?\u003c\/li\u003e\n\u003cli\u003eHow many jumps can I do in a minute?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"feat-table\" class=\"table table-sm table-hover\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMat Material\u003c\/th\u003e\n\u003ctd\u003ePVC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eConnecting Lead\u003c\/th\u003e\n\u003ctd\u003eScreened cable approximately 2 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eWhat's in the box\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"spec-table\" class=\"table table-sm table-hover\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 x Vu+ Timing Mats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2 x 1.5 metre digital sensor leads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct Manual\u003c\/h5\u003e\n\u003ch5\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23c0b8b8\u0026amp;d=2332_ds124_3_vu_timing_mats\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35491417032,"sku":"2332PK","price":620.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/jumps.jpg?v=1616306101"},{"product_id":"vu-temperature-sensor","title":"Vu Temperature sensor","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis general-purpose Temperature sensor is the most commonly used sensor in the range and that's why we include it as part of the Vu+ data logging pack. It can accurately measure the temperature and heat of air, water, soil and weak acidic solutions.\u003c\/p\u003e\n\u003cp\u003eNote: Vu+ data logger required.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/PvV2wWXnalk?si=r7mEE2CM3VloZDOo\" height=\"315\" width=\"560\" allowfullscreen=\"\" referrerpolicy=\"strict-origin-when-cross-origin\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/vu-temperature-sensor-child-b.jpg?v=1712150559\" alt=\"\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/files\/vu-temperature-sensor-child-b.jpg?v=1712150559\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"col-sm-6\"\u003e\n\u003cp\u003e\u003cstrong\u003eA Versatile Sensor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTake a look at just some of the investigations you can do with a Vu Temperature Sensor.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExploring e.g. How to decide when it is hot or when it is cold? How warm is our classroom?\u003c\/li\u003e\n\u003cli\u003eRecording e.g. The temperature game.\u003c\/li\u003e\n\u003cli\u003eInvestigating e.g. What happens when I am not here? How does heat move around? How does temperature change as you heat water? How heat changes against time? When materials combine, there will be a reaction.\u003c\/li\u003e\n\u003cli\u003eInsulation investigations e.g. Heat gain and loss.\u003c\/li\u003e\n\u003cli\u003eChanging of state e.g. Freezing and melting of water.\u003c\/li\u003e\n\u003cli\u003eEarth, Sun and Moon e.g. Seasons.\u003c\/li\u003e\n\u003cli\u003eEnvironment: e.g. Bug Alert. Why is it different over here? Habitats. Pond and river studies.\u003c\/li\u003e\n\u003cli\u003eSolar energy.\u003c\/li\u003e\n\u003cli\u003eMonitoring using 2 Temperature sensors e.g. What shall I wear today? Keeping warm. Where is it cold and hot? Decay. Are your hands warmer than mine? Goldilocks. Hot drinks. Too hot!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"table table-sm table-hover\" id=\"feat-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRanges\u003c\/th\u003e\n\u003ctd\u003eCelsius, Fahrenheit or Heat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCelsius\u003c\/th\u003e\n\u003ctd\u003e-30 to +110°C, 0 to 110°C, 0 to 50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFahrenheit\u003c\/th\u003e\n\u003ctd\u003e-22 to 230°F, 0 to 232°F, 0 to 120°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHeat\u003c\/th\u003e\n\u003ctd\u003e--2.50 to 9.00 J\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct manual\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca download=\"\" href=\"https:\/\/store.data-harvest.co.uk\/download\/2320_ds125_2_vu_temperature_sensor.pdf\"\u003eDownload\u003c\/a\u003e Vu Temperature Manual | Version: 2\u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23bcbcbc\u0026amp;d=2320_ds125_2_vu_temperature_sensor\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35492021640,"sku":"2320","price":147.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/vu-temperature-sensor-child-b.jpg?v=1616306013"},{"product_id":"vu-voltage-sensor","title":"Vu Voltage sensor","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Vu Voltage sensor measures the voltage across any component for DC low voltage circuits from 0 to 3 V via the 4 mm plugs that attach to most of the standard available electronic kits, or the crocodile clips (supplied) to connect to bare wires \u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/WNKeaPTYtJQ?si=6XxhEAOfOfZVYLlU\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Investigations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTake a look at just some of the investigations you can do with a Vu Voltage Sensor.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBattery comparisons\u003c\/li\u003e\n\u003cli\u003eBulb \/ LED comparisons\u003c\/li\u003e\n\u003cli\u003eSeries and parallel circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"tech-header\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable id=\"feat-table\" class=\"table table-sm table-hover\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e0 to 3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eThe 4 mm plugs attach to most of the standard available electronic kits, or the crocodile clips (supplied) can be used to connect to bare wires. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eProduct Manual\u003c\/h5\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/2325_ds126_2_vu_voltage_sensor.pdf\" download=\"\"\u003eDownloads\u003c\/a\u003e\u003cspan\u003e VU Voltage Sensor Manual  \u003c\/span\u003e\u003cspan\u003eDoc No.: DS126 | Issue: 2\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe style=\"border: none; width: 100%; height: 326px;\" src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23bcbcbc\u0026amp;d=2325_ds126_2_vu_voltage_sensor\u0026amp;hideIssuuLogo=true\u0026amp;u=etchongkong\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":35494334792,"sku":"2325","price":136.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/12285537266_851dacb7c9_z.jpg?v=1493915920"},{"product_id":"vu-switch-kit-for-timing-ramp","title":"Vu Switch Kit for Timing Ramp","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e This Switch kit has been designed for use with the \u003ca rel=\"noopener\" href=\"https:\/\/www.etchkshop.com\/collections\/data-harvest\/products\/vu-timing-ramp-set\" target=\"_blank\"\u003eVu Timing Ramp\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe Kit has two Switches each connected to a lead that ends with a jack plug, a magnet and two sticky pads.\u003cbr\u003e\u003cbr\u003eThe Switches are magnetic proximity switches which fit into the two holes in the timing ramp.\u003cbr\u003e\u003cbr\u003eThe Switches connect to the timing inputs (A and B) on the Vu+ data logger.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Manuals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/store.data-harvest.co.uk\/download\/3841_\u0026amp;_2341_ds108_3_switch_kit_for_timing_ramp.pdf\" download=\"\"\u003eDownload\u003c\/a\u003e Switch Kit for Timing Ramp | Version: 3\u003c\/p\u003e\n\u003ciframe src=\"\/\/e.issuu.com\/embed.html?backgroundColor=%23e4c49c\u0026amp;d=3841___2341_ds108_3_switch_kit_for_timing_ramp\u0026amp;hideIssuuLogo=true\u0026amp;pageLayout=singlePage\u0026amp;u=etchongkong\" style=\"border: none; width: 100%; height: 326px;\" allowfullscreen=\"true\"\u003e\u003c\/iframe\u003e","brand":"Data Harvest","offers":[{"title":"Default Title","offer_id":39392898089115,"sku":"2341","price":357.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/2341_20-_20Vu_20Switch_20Kit_20web.png?v=1615430003"}],"url":"https:\/\/www.etchkshop.com\/collections\/datalogging-sensors\/hkb.oembed","provider":"ETC Educational Technology Connection (HK) Ltd","version":"1.0","type":"link"}