Drop and Bubble Counter

datalogging sensors

Data Harvest

Product Description

 

A sensor for accurate and automated titrations. 

Use one of the 7 precalibrated ranges or count the drops and calibrate to the drop size. Accuracy is to the volume of the last counted drop.

 


1-minute on Drop and Bubble Counter

 

The sensor comes complete with alignment plate, mounting rod, reservoir, control taps and precision dropping point.

 

 

Teaching applications:
  • High accuracy titrations
  • Large bubble counting for rate of reaction work
  • Fermentation monitoring
Extension and advanced ideas:
  • First derivative of rate of change of pH

 

 

Downloads Drop Bubble Counter Sensor Manual   Doc No.: DS066 | Issue: 2

 

Contents/Details:

Counts: 0 to 10,000
Volume: 0 to 120 cm³
Drop rate: 23 to 29 drops per cm³

Comes complete with guide plate, reservoir (55 ml capacity), control taps, precision drop nozzle and mounting rod

  • Guide plate has ports for pH and temperature sensors
  • Uses an infrared light source, heat sources and direct light with infra red (e.g. sunlight) may interfere with drop detection
  • When counting gas bubbles, the volume cannot be calibrated
  • Counter reset on sensor
  • Drop range will require a very low volume volumetric flask (10 cm3 max) for calibration
  • Reservoir, taps and dropping points all use Luer twist fit connections
  • Replacement packs of tips and taps are available
  • PC Software can be used to show first derivative of rate of change of pH for high accuracy end point determination
  • Small, fine bubbles such as those produced by oxygenating pond weed are unlikely to be detected

 

 

Yeast ferment and substrate. (Biology (14-18) eBook)
How does the substrate available for respiration affect the energy released. Good for a mini project

Phosphate in cola by titration (Biology (14-18) eBook)
This is investigation would be suitable for work in areas of food science, forensics and biochemistry. It is normally an investigation for the chemistry students, but this work falls into the area where chemistry is used to serve the needs of a biological investigation

Hydrogen peroxide catalysis (Biology (14-18) eBook)
Introduces catalysts before moving onto enzymes (biological catalysts). Creates and introduces a standard method for studying catalysed reactions.

Catalase activity by gas evolution (Biology (14-18) eBook)
Introduces enzyme catalysis using catalase. Counts the number of gas bubbles evolved over a time to quantify enzyme activity. Introduces the possibility of modifying the base activity to study factors that alter the enzyme activity.

Titration of alanine (isoelectric point) (Biology (14-18) eBook)
An activity to demonstrate on of the characteristics of an amino acid. A careful titration of alanine will reveal two isoelectric points and reveal its amphoteric nature.

Juiceextract (Biology (14-18) eBook)
Use an enzyme to increase juice extraction and use the dropcounter to measure the increases juice extraction.

 

 

Strong base - acid titration (drop counter) (Chemistry (11 -14) eBook)
In this investigation the Drop Counter is used to electronically measure the volume of acid titrated into a known volume of alkali. The experiment will use acid (hydrochloric) and alkali (sodium hydroxide) of equal molar strengths to help understanding. Very accurate.

 

Rate of reaction: CO2 bubbles from marble chips. (Chemistry (11 -14) eBook)
When marble chips (calcium carbonate) react with an acid, they produce carbon dioxide gas and a salt The rate at which the carbon dioxide is produced provides a way of measuring the rate of the reaction. Compare rates with changes in surface area, temperature or concentration of acid.

Strong acid strong base titration (Chemistry (14-18) eBook)
In this investigation a Drop counter is user to electronically measure the volume of acid titrated into a known volume of alkali. The experiment uses equal molar acid (hydrochloric) and alkali (sodium hydroxide). First derivative can be shown.

Sodium carbonate - acid titration (Chemistry (14-18) eBook)
In this investigation the Drop counter is used to electronically measure the volume of hydrochloric acid titrated into a known volume of sodium bicarbonate solution. The experiment uses 1 mol dm-3 hydrochloric acid and 0.5 mol dm-3 sodium carbonate

Polyprotic acid titration (Phosphoric acid) (Chemistry (14-18) eBook)
Titration of a polyprotic acid to reveal each ionisation / equivalance point. Possibility to calculate pKa for each ionisation.

Estimation of phosphate in cola by titration (Chemistry (14-18) eBook)
This investigation continues and applies the work from the investigation into polyprotic acids(phosphoric acid), A more sophisticated analytic titration.

Titration of alanine (Chemistry (14-18) eBook)
Titration of an amino acid to show the dual nature.

Sodium hydroxide - acid conductance titration (Chemistry (14-18) eBook)
Alternativer titration using change in conductance to find the isoelectric point. A drop counter is used for maximum accuracy.

43 Barium hydroxide conductivity titration (Chemistry (14-18) eBook)
The reaction between barium hydroxide and sulphuric acid produces a precipitate of barium sulphate. the creation of the precipitate alters the conductance of the reaction mixture giving a good alternative titration practical.

Rate of reaction study with marble chips and acid. (Chemistry (14-18) eBook)
When marble chips (calcium carbonate) react with an acid, they produce carbon dioxide gas. The rate at which the carbon dioxide is produced provides a way of measuring the rate of the reaction.

Catalysis with metal oxides and peroxide. (Chemistry (14-18) eBook)
Use a bubble counter to count bubbles of gas produced from the breakdown of hydrogen peroxide. Produces relative volume and rate.

Viscosity (Chemistry (14-18) eBook)
Not quite the pitch experiment, but he same idea, how long does it take for a standard volume to pass through a standard opening on a reservoir. Counts drops per unit time to create a rate.

HK$ 1,044.00