Extech PH meter

pH Meter

Regular price £227.00 £0.00 Unit price per

What is a pH meter and what is it used for?

A pH meter is an electric tool used to measure hydrogen-ion activity (acidity or alkalinity) in liquid solutions. Providing fast, reliable results, the pH meter determines the rate and results of chemical reactions taking place in the solution.

How does a pH meter work?

The pH100 uses a high quality flat surface electrode to ensure the accuracy of the measurements of liquids. When in use, the pH meter measures both the pH level and the overall temperature of the targeted application, with both results displayed simultaneously. The digital display screen will indicate the following results once the chlorine levels of the solution have been measured: less than 7 (acidic), 7 (neutral) and 7 or more (alkaline).

CAL alerts and automatic warnings will inform the user of when the pH electrode needs replacing and when the pH meter requires calibration. When calibrating, the pH meter immediately recognises the solution and calibrates itself to that value. It will automatically return to normal operation immediately afterwards, with the data safely stored until the next time calibration is required.

What are the benefits of using a pH meter?

The pH 100 is capable of accurately measuring across a wide range of pH values from 0 to 14, making it suitable for the evaluation of acidic and alkaline solutions. It includes functions for data holding, auto power-off and a low battery indicator, as well as an IP57 waterproof design and an interchangeable module that is designed to accept both chlorine and oxidation-reduction potential (ORP). Data can be stored directly on the device, with built-in memory that allows for the storage of up to 15 sequentially tagged readings.

Where can a pH meter be used?

A pH meter can be used to measure pH levels in water, wastewater treatment, medicine, chemicals, manufacturing, chemicals, health care, swimming pools, hot tubs, food and beverages and soils.

pH cells are not designed to be stored in dry conditions and can only survive in such an environment for a short period of time. To test the functionality of a pH meter if it has been exposed to dry conditions for an extensive period, fully immerse it into the solution and check the reading. If it is close to the known pH of the liquid or anywhere else below a reading of 7, it is more likely that the sensor can be revived. However, if the reading is above 7, the sensor will likely be too weak to be revived, and if below 13.6, requires immediate replacement.

Click here to access the datasheet for the pH100.


The pH 100 is available for purchase via credit/debit card, as well as Apple and Google Pay. Please contact us if you would like to pay via bank transfer or raise a PO.

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If you are interested in finding out more about the pH100 or how SOCOTEC can support you with its wide range of Water Treatment & Hygiene services, click here or contact us using this link.