pH Pack

datalogging sensors


Data Harvest

Product Description


This pack contains both the pH adaptor and the pH electrode to form the immensely popular pH sensor


1-minute on pH sensor

1-minute on pH sensor + Drop and bubble counter

The Smart Q pH sensor has both a pre-set calibration range (so the sensor is ready for immediate use in Chemistry or Biology) and a user calibration range.


  • Testing acids and alkalis
  • Acid-Base titrations
  • Acid rain
  • Water quality

  • Dissolved Oxygen in water
  • Enzyme action
  • Cell respiration
  • Human respiration
  • Photosynthesis and respiration


Download pH Sensor Manual   Doc No.: DS026 | Issue: 6

Download Electrolyte Data Sheet  Doc No.: 2251 | Issue: 2



1x (2251) pH Glass Electrode
1x (3125) pH Adaptor


The Sensor has two ranges:

  • The Default calibration - the stored pre-set calibration suitable for most experiments.
  • The User calibration – the calibration can be adjusted using the Sensor Config application in the EasySense software to take into account different temperatures (above or below 25°C) or deterioration of an electrode.

Maintain the level of storage solution, the pH sensitive glass membrane must be kept wet. Store the electrode tip in a 1:1 solution of pH 4 buffer and 3.5 to 4 mol dm-3 KCl




CO2 from respiration. (Biology (11-14) ebook)
Demonstration activity to show carbon dioxide production from yeast as a model of respiration. Conditions around the yeast can be changed to show effect of temperature.

Osmosis (Biology (11-14) ebook)
A data logging variation of a study into osmosis using visking tubing

Measuring CO2 from organisms (Biology (14-18) eBook)
A data logging version of the classic lime water demonstration to show that carbon dioxide is produced by living organisms. Uses yeast.

Osmosis (Biology (14-18) eBook)
Study osmosis by changes in pressure, pH, ion strength. A new take on dialysis tubing studies of osmosis.

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 oxygen) in a single activity.

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

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.

Biological buffers (Biology (14-18) eBook)
A simple activity to investigate how buffers work.

Lipase and milk (classic enzyme practical) (Biology (14-18) eBook)
Reworking of a classic enzyme practical. Measure changes in pH as milk fats are digested by a lipase.



Measuring pH (Chemistry (11 -14) eBook)
Introductory activity about pH, acidity, alkalinity and using pH electrodes.

What is the pH of water? (Chemistry (11 -14) eBook)
In this investigation one simple measurement is used to compare the pH of water samples. Does the pH tell us anything about water quality, safety?

Effective antacids (Chemistry (11 -14) eBook)
Classic investigation, how much active ingredient is there in a simple antacid. A first analytical practical.

Reaction between chemicals from home (Chemistry (11 -14) eBook)
This investigation shows the reaction of an acid with a carbonate - carbon dioxide gas is released as bubbles. You could use this as an opportunity to show that a characteristic of carbonates is the production of CO2 when reacted with an acid.

Reacting acid and alkali (Chemistry (11 -14) eBook)
A first titration, uses pipettes and an on screen prompt for data collection. Good for introducing the idea of titration as an analytical tool and as a method of finding the "balance" in a reaction.

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.

Measuring pH (Chemistry (14-18) eBook)
Simple activity to measure the pH of a range of solutions. Uses the pH electrode to take recordings, useful background experience activity before moving onto titration work.

pH of everyday substances (Chemistry (14-18) eBook)
An activity to show that acids and alkalis are all around us. Gives further experience of handling and using the pH electrode as an measurement instrument.

pH of water(s) (Chemistry (14-18) eBook)
In this investigation one simple measurement is used to compare the pH of water samples.

Comparison of simple antacids (Chemistry (14-18) eBook)
A popular cure for acid indigestion (heartburn) is to take a simple acid neutralising antacid, Compare products for value and efficiency. An introductory activity to analytical and comparative chemistry.

Reaction between an acid and an alkali (Chemistry (14-18) eBook)
As presented the work investigates the change of pH as the reaction progresses. An introduction to titration work and chemical analysis.

A chemical reaction using two chemicals found in the home. (Chemistry (14-18) eBook)
This investigation studies the reaction of an acid with a carbonate - carbon dioxide gas is released as bubbles. Additional measurement of change in pH and temperature are monitored in real time by the sensors.

Studying buffers (Chemistry (14-18) eBook)
In this experiment the effect of adding small volumes of acid or alkali to a buffered and un-buffered solution is studied. .

Acid - alkali titration using a burette (Chemistry (14-18) eBook)
This is a standard pH titration investigation that uses the EasySense software to record the volumes of acid / alkali added and the change in pH.

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.

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HK$ 1,176.00


pH adaptor and electrode pack