pH Meters & testers

pH testers and electrodes, buffer solutions, and conductivity meters for laboratories, food processing, agriculture and more.

pH Meters & testers

pH meters measure the acidity or alkalinity of a solution. Frequently used in agriculture, food processing, laboratories and aquariums, pH meters test the quality of water, soil, food and other substances.

ETI offers a range of pH meters for different budgets and applications, ranging from easy-to-use pocket pH meters to digital pH and temperature meters with interchangeable electrodes.

All of our pH meters can be recalibrated at the touch of a button when used in conjunction with pH buffer solutions.

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  • pH buffer solutions - 7.00 pH

    pH buffer solutions

    pH buffer solutions
    £11.00
    £13.20 inc. VAT
    £11.00 £11.00
    £13.20 inc. VAT
  • Budget pH Electrode

    Budget pH Electrode

    Budget pH Electrode
    £24.00
    £28.80 inc. VAT
    £24.00 £24.00
    £28.80 inc. VAT
  • General Purpose pH Electrode

    General Purpose pH Electrode

    General Purpose pH Electrode
    £48.00
    £57.60 inc. VAT
    £48.00 £48.00
    £57.60 inc. VAT
  • 8100 pH & Temperature Meter Kit

    8100 pH & Temperature Meter Kit

    8100 pH & Temperature Meter Kit
    £137.00
    £164.40 inc. VAT
    £137.00 £137.00
    £164.40 inc. VAT
  • pH Electrode Storage Solution

    pH Electrode Storage Solution

    pH Electrode Storage Solution
    £33.50
    £40.20 inc. VAT
    £33.50 £33.50
    £40.20 inc. VAT
  • 8000 pH Meter with Interchangeable Electrode

    8000 pH Meter with Interchangeable Electrode

    8000 pH Meter with Interchangeable Electrode
    £80.00
    £96.00 inc. VAT
    £80.00 £80.00
    £96.00 inc. VAT
  • pH PAL Plus Meter

    pH PAL Plus Meter

    pH PAL Plus Meter
    £67.00
    £80.40 inc. VAT
    £67.00 £67.00
    £80.40 inc. VAT
  • pH Electrode Cleaning Solution

    pH Electrode Cleaning Solution

    pH Electrode Cleaning Solution
    £33.50
    £40.20 inc. VAT
    £33.50 £33.50
    £40.20 inc. VAT
  • 8100 Plus pH Temperature Meter / 8100 Plus Kit - 8100+ pH kit

    8100 Plus pH Temperature Meter / 8100 Plus Kit

    8100 Plus pH Temperature Meter / 8100 Plus Kit
    £206.50
    £247.80 inc. VAT
    £206.50 £206.50
    £247.80 inc. VAT
  • pH Buffer Capsules - Pack of 10 - 7.00 pH

    pH Buffer Capsules - Pack of 10

    pH Buffer Capsules - Pack of 10
    £21.00
    £25.20 inc. VAT
    £21.00 £21.00
    £25.20 inc. VAT
  • 8500 Conductivity Meter

    8500 Conductivity Meter

    8500 Conductivity Meter
    £120.00
    £144.00 inc. VAT
    £120.00 £120.00
    £144.00 inc. VAT
  • TDS Conductivity Testers - TDS1 ppm

    TDS Conductivity Testers

    TDS Conductivity Testers
    £69.00
    £82.80 inc. VAT
    £69.00 £69.00
    £82.80 inc. VAT
  • 6mm Spear-Shaped pH Electrode

    6mm Spear-Shaped pH Electrode

    6mm Spear-Shaped pH Electrode
    £105.00
    £126.00 inc. VAT
    £105.00 £105.00
    £126.00 inc. VAT
  • Budget pH Knife Electrode

    Budget pH Knife Electrode

    Budget pH Knife Electrode
    £120.00
    £144.00 inc. VAT
    £120.00 £120.00
    £144.00 inc. VAT
  • 12mm Spear-Shaped pH Electrode

    12mm Spear-Shaped pH Electrode

    12mm Spear-Shaped pH Electrode
    £105.00
    £126.00 inc. VAT
    £105.00 £105.00
    £126.00 inc. VAT
  • pH Meter Kit Zip Pouch
    Sale

    pH Meter Kit Zip Pouch

    pH Meter Kit Zip Pouch
    £10.00
    £12.00 inc. VAT
    £12.50 £10.00
    £12.00 inc. VAT
  • TDS Solutions - TDS1

    TDS Solutions

    TDS Solutions
    £10.50
    £12.60 inc. VAT
    £10.50 £10.50
    £12.60 inc. VAT
  • HortiCare Nutrient Tester

    HortiCare Nutrient Tester

    HortiCare Nutrient Tester
    £77.00
    £92.40 inc. VAT
    £77.00 £77.00
    £92.40 inc. VAT
  • HortiStick Nutrient Tester for pH, EC & temperature

    HortiStick Nutrient Tester for pH, EC & temperature

    HortiStick Nutrient Tester for pH, EC & temperature
    £156.00
    £187.20 inc. VAT
    £156.00 £156.00
    £187.20 inc. VAT
8000 pH Meter with Interchangeable Electrode

ETI pH Meters for Lasting Accuracy

pH testing is a key part of monitoring and controlling liquid quality across a wide range of environments. From routine spot checks to more detailed analysis, accurate readings help users maintain consistency and confidence in their results.

Used across laboratories, agriculture, food production, and water systems, pH meters support everyday decision-making where conditions need to be understood and controlled.

ETI’s range is designed to offer dependable performance in real working environments, with options suited to both simple field testing and more demanding professional applications.

8100 Plus pH Temperature Meter / 8100 Plus Kit - 8100+ pH kit

Why pH Testing Matters

Product quality

Confirms consistency in food, drinks, and manufactured goods where pH directly affects taste, stability, and performance.

Agriculture

Guides soil management to support nutrient uptake and healthy, productive crop growth.

Water quality

Monitors drinking water, wastewater, pool water, and natural sources to ensure safety and compliance.

Industrial & laboratory processes

Provides precise control for chemical reactions, formulations, and testing where accuracy is essential.

Aquaculture

Maintains stable aquatic conditions, supporting fish health and preventing stress or disease in tanks and ponds.

 High Quality pH Tester Range

Budget-friendly pH meters

Pocket-sized, budget pH testers for everyday checks. Ideal for homebrewing, gardening, aquariums and more. 

High-accuracy pH meters

Robust, waterproof and British-made options with accuracies up to ±0.02pH. Ideal for laboratories, food processing and other professional environments where accuracy and repeatability are essential. 

Purpose-built electrodes

Range of pH electrodes designed for specific items such as meat and cheese. 

Conductivity meters

Trusted instruments for testing electrical conductivity in solutions. Ideal for testing water purity, nutrient levels in hydroponics, salinity in soil and aquaculture, and cleaning validation in pharmaceuticals.

Frequently Asked Questions

What is a pH meter?

A pH meter measures how acidic or alkaline a liquid is. It’s widely used in water testing, food production, and industrial processes where chemical balance is important.

How does a pH meter work?

A pH meter uses a probe to measure hydrogen ion activity in a liquid. The result is displayed as a pH value, giving a clear indication of acidity or alkalinity.

What is a pH meter used for?

pH meters are used in applications such as water quality testing, agriculture, food production, and industrial processes. They help ensure conditions are safe, consistent, and within required limits.

What is conductivity measurement used for?

Conductivity meters measure how well a liquid conducts electricity, which indicates the level of dissolved ions. This is commonly used in water quality testing and process monitoring.

What is the difference between pH and conductivity?

pH measures acidity or alkalinity, while conductivity measures the overall ionic content of a liquid. Together, they provide a more complete picture of water quality.

How accurate are pH meters?

High-quality pH meters provide reliable, repeatable readings when used correctly. Accuracy depends on proper calibration, electrode condition, and correct handling.

Watch our video to learn how to maintain an accurate pH meter.

Budget-friendly options like the ETI pH Pal Plus have an accuracy of ±0.2 pH, whereas premium instruments like the ETI 8100 Plus pH meter have a high accuracy of ±0.02pH.

How often should a pH meter be calibrated?

pH meters should be calibrated regularly using buffer solutions. Frequency depends on usage, but frequent calibration ensures consistent and trustworthy results.

Do pH meters need maintenance?

Yes, pH testers require regular care to maintain accuracy. You should use a storage solution in between uses, a cleaning solution before and after use, and buffer solutions for regular calibration checks.

Download our pH care guide to learn how to maintain accurate pH and conductivity meters.