Light level sensor (multi-range)

datalogging sensors


Data Harvest

Product Description

A light sensor that is balanced to the human eye spectral response.

5 ranges to cover 0 -100,000 lx and a transmission range for home made colorimeters. One of the essential sensors for data logging.


42-second  Light sensor 1,000 lux slow

Teaching applications:
  • Inverse square law
  • Start up current of light bulb
  • a.c. and d.c. lighting
  • Reflections
  • Colorimetry
  • Photosynthesis and light intensity

Extension and advanced ideas:
  • Variation of light intensity in young’s slit diffraction
  • Hours of daylight
  • Incident light vs. season / angle
  • Polarizers

More info:

  • 0 -1,000 Lx suitable for interior and lab lighting work.
  • 0 -10K Lx Suitable for strong local light sources e.g. bench lamps.
  • 0 – 100K Lx Suitable for most outside light
  • 0 – 1000 Lx Fast for low light sources where intensity is changing rapidly

    Download Multi-range Light Level   Doc No.: DS099 | Issue: 2


    0 to 1,000 Lux (Resolution 1 Lux)
    0 to 10,000 Lux (Resolution 5 Lux)
    0 to 100,000 Lux (Resolution 43 Lux)
    0 to 1,000 Lux fast response (Resolution 1 Lux)
    0 to 110% Transmission


    Use pH to monitor photosynthesis (Biology (11-14) ebook)
    Measure 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.

    Plant growth (Biology (11-14) ebook)
    Photosynthesis 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. 

    Monitoring the environmnet (Biology (11-14) ebook)
    Data 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. 

    Enzyme reaction (Amylase) (Biology (11-14) ebook)
    A data logging version of the classic amylase and starch study of enzyme action. 

    Plant growth (Biology (14-18) eBook)
    We 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. 

    Monitor an environment (Biology (14-18) eBook)
    Use 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?

    Light and photosynthesis (Biology (14-18) eBook)
    Use 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 

    Photosynthesis and Respiration (Biology (14-18) eBook)
    Measures 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 

    Diurnal variations In tree trunk (Biology (14-18) eBook)
    Uses 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 

    Enzyme studies with a light sensor (Biology (14-18) eBook)
    An 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.

    Measuring changes in CO2 around a plant (Biology (14-18) eBook)
    The 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. 


     Light and voltage (Physics (11-14) eBook)
    Investigations with simple solar cells. Voltage produced, current, effect of light intensity, insolation angle etc.

    Hot water from sun (Physics (11-14) eBook)
    This is an open ended investigation that allows the students to make and develop a simple solar water 

    Can lamp brightness be used to measure current? (Physics (11-14) eBook)
    This 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.

    Reflections (Physics (11-14) eBook)
    Following rays through glass blocks or across benches is standard school optics. Here we consider the reflectivity of materials.

    Brightness vs. distance (Physics (11-14) eBook)
    How 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.

    Brightness of a lamp and voltage (Physics (11-14) eBook)
    How does the voltage affect the brightness of simple filament lamp.

    Brightness vs. voltage (using sensors) (Physics (11-14) eBook)
    How is the brightness of a simple filament lamp affected by voltage. Use sensors to plot light intensity against voltage:

    How is power available affected by length of cable / wire? (Physics (11-14) eBook)
    In 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.

    Voltage and brightness (Physics (14-18) : Electricity & Heat eBook)
    A revision of the basic concepts of electricity. e.g. difference between voltage and current 

    Current and brightness In a circuit (Physics (14-18) : Electricity & Heat eBook)
    This activity involves pupils thinking in detail about the relationship between brightness and current. Good opportunity to remind about the difference between voltage and current.

    Start up current of a lamp (Physics (14-18) : Electricity & Heat eBook)
    High 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! 

    Extension leads (Physics (14-18) : Electricity & Heat eBook)
    Why do they always tell you to fully unwind an extension lead? a simple investigation to model power loss over long cable runs. 

    Reflectivity (Physics (14-18) : Light, Sound & Pressure eBook)
    In 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. 

    How does light intensity vary with distance (Physics (14-18) : Light, Sound & Pressure eBook)
    On the surface a simple light vs. distance exercise, but is also an illustration of inverse square and estimation of star distances.

    Polarising sunglasses (a study of polarisation of light) (Physics (14-18) : Light, Sound & Pressure eBook)
    Uses how polarised sun glassses reduce sparkle to investigate the polorisation of light. 

    Single slit interference of light (Physics (14-18) : Light, Sound & Pressure eBook)
    By 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.

    Young's double slit experiment - a new twist (Physics (14-18) : Light, Sound & Pressure eBook)
    Normally 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. 

    Infra red in the spectrum (Physics (14-18) : Light, Sound & Pressure eBook)
    Use a light sensor and infra red sensor to reveal the wider spectrum.

    Fast Light (Physics (14-18) : Light, Sound & Pressure eBook)
    Make 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.


    Polarising sunglasses (Science in Sport (11-18) eBook)
    Looking 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.

    Infra red and sunlight (Science in Sport (11-18) eBook)
    A little light relief. Why can they light the olympic torch from sunlight on mount olympus?


    Why do bulbs blow (Science At Work (11-16) eBook)
    This 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. 

    Extension leads (Science At Work (11-16) eBook)
    In 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?.

    Electric from sunlight (Science At Work (11-16) eBook)
    In 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.

    Solar waterboilers (Science At Work (11-16) eBook)
    This 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.

    Polarising sunglasses (Science At Work (11-16) eBook)
    Why do polarised sunglasses reduce sparkle and glare

    HK$ 788.00