pH Meters & Water Quality Testers

High quality pH meters and water quality testers including soil pH meters, meat pH meters, electronic pH meters and others suitable for use in both home-based applications such as swimming pools and in laboratory testing. Read More about pH Meters & Water Quality Testers
  1. Extech EC150 Conductivity / TDS / Temperature Meter
    Extech logo
    2 In Stock
    Extech EC150 Conductivity / TDS / Temperature Meter
    (1)
    £68.40 £57.00
    • Triple function meter measures conductivity, TDS and temperature
    • Fully waterproof with IP65 rating
    • Simultaneous measurements of conductivity or TDS + temperature
    57 Reward Points
    Price Match Guarantee
    EC150
  2. Extech EC170 Salinity/Temperature Meter
    Extech logo
    In Stock
    Extech EC170 Salinity/Temperature Meter
    (no reviews)
    £69.60 £58.00
    • Dual measurements of salinity and temperature
    • Autoranging with 2 ranges of measurement
    • Waterproof design meets IP65 standards
    58 Reward Points
    Price Match Guarantee
    EC170
  3. Chauvin Arnoux C.A. 10001 Waterproof Thermometer and pH Tester
    Chauvin Arnoux logo
    2 In Stock
    Chauvin Arnoux C.A. 10001 Waterproof Thermometer and pH Tester
    (no reviews)
    £70.80 £59.00
    • Pocket-sized, portable design for easy transportation
    • Indicates pH values and temperatures simultaneously on the wide, multi-parameter display
    • ATC and automatic calibration ensure accurate pH readings
    59 Reward Points
    Price Match Guarantee
    P01710015
  4. ETI 813-513 pH Pal Plus pH Tester
    ETI logo
    2 In Stock
    ETI 813-513 pH Pal Plus pH Tester
    (1)
    £72.00 £60.00
    • Pocket-sized, easy-to-use pH meter
    • Automatic recalibration function (requires optional buffer solution)
    • IP65 rated, water-resistant design
    60 Reward Points
    Price Match Guarantee
    813-513
  5. ETI 813-52X TDS Conductivity Tester - Choice of Four Models
    ETI logo
    ETI 813-52X TDS Conductivity Tester - Choice of Four Models
    (no reviews)
    £79.20 £66.00
    • Can be used to measure the conductivity of a solution in order to determine the volume of dissolved solids
    • Portable, pocket-sized design
    • Automatic temperature compensation between 0 and 50°C
    66 Reward Points
    Price Match Guarantee
    813-52X
  6. Extech PH90 Waterproof pH and Temperature Meter
    Extech logo
    Extech PH90 Waterproof pH and Temperature Meter
    (no reviews)
    £82.20 £68.50
    • Measures pH and temperature levels simultaneously
    • Use with liquids, semi-solids and solids
    • High quality non-glass electrode resists breaking and clogging
    68 Reward Points
    Price Match Guarantee
    PH90
  7. ETI 8000 pH Meter with Interchangeable Electrode
    ETI logo
    In Stock
    ETI 8000 pH Meter with Interchangeable Electrode
    (2)
    £96.00 £80.00
    • Accurate pH meter with flexible, removeable electrode sensor
    • 0 to 14pH range
    • Automatic recalibration when used with buffer solution
    80 Reward Points
    Price Match Guarantee
    860-800
  8. Extech PH100 ExStik pH Meter
    Extech logo
    Extech PH100 ExStik pH Meter
    (3)
    £102.00 £85.00
    • Comes with pH electrode, meter, sensor caps, sample cups and batteries
    • Built-in smart chip for advanced functions
    • RENEW feature tells you when to get a new electrode
    85 Reward Points
    Price Match Guarantee
    PH100
  9. Extech PH110 ExStik Refillable pH Meter
    Extech logo
    3 In Stock
    Extech PH110 ExStik Refillable pH Meter
    (no reviews)
    £106.80 £89.00
    • Unique device with refillable electrode
    • No need to worry about shelf life
    • Usable with one hand
    89 Reward Points
    Price Match Guarantee
    PH110
  10. Extech EC400 ExStik II Conductivity, TDS & Salinity Meter
    Extech logo
    Extech EC400 ExStik II Conductivity, TDS & Salinity Meter
    (1)
    £106.80 £89.00
    • Measures TDS, conductivity, salinity and temperature
    • Automatic Temperature Compensation of 2%
    • Stores up to 25 readings
    89 Reward Points
    Price Match Guarantee
    EC400
  11. Extech RE300 ExStik ORP Meter
    Extech logo
    Only 1 In Stock
    Extech RE300 ExStik ORP Meter
    (no reviews)
    £109.91 £91.59
    • Takes pH measurements up to two decimal places
    • Analog bar graph displays pH levels
    • Smart Chip technology 
    91 Reward Points
    Price Match Guarantee
    RE300
  12. TPI 390a Handheld TDS/Salt Meter
    TPI logo
    Lead Time: 1-6 Days
    TPI 390a Handheld TDS/Salt Meter
    (no reviews)
    £117.60 £98.00
    • Measure both salt and TDS content of liquid
    • Accurate and reliable
    • Handheld design
    98 Reward Points
    Price Match Guarantee
    TPI-390a
  13. TPI 397 pH Meter
    TPI logo
    Lead Time: 1-2 Weeks
    TPI 397 pH Meter
    (no reviews)
    £118.80 £99.00
    • Test pH from 0.10 to 14
    • Replaceable glass tip electrode
    • High accuracy
    99 Reward Points
    Price Match Guarantee
    TPI-397
  14. Testo 206-pH3 Temperature/pH Meter
    Testo logo
    Testo 206-pH3 Temperature/pH Meter
    (no reviews)
    £133.20 £111.00
    • Allows connection of wide variety of external pH probes
    • Not affected by dirt/dust
    • Versatile measurement range thanks to probe options
    111 Reward Points
    Price Match Guarantee
    5632063
  15. Testo 206-pH1 Temperature/pH Meter
    Testo logo
    Lead Time: 1-2 Weeks
    Testo 206-pH1 Temperature/pH Meter
    (no reviews)
    £139.74 £116.45
    • Designed for liquid measurements
    • Accurate pH and temperature measurements
    • Not affected by dust or dirt thanks to the TopSafe protection case
    116 Reward Points
    Price Match Guarantee
    5632061
  16. Extech PH220-C Waterproof Palm pH Meter Kit
    Extech logo
    Only 1 In Stock
    Extech PH220-C Waterproof Palm pH Meter Kit
    (2)
    £150.00 £125.00
    • Totally waterproof unit
    • Ultra-portable
    • Comes with pH electrode, holster, battery and pH buffers
    125 Reward Points
    Price Match Guarantee
    PH220-C
  17. ETI 225-085 8100 Plus pH, mV & Temperature Meter
    ETI logo
    Lead Time: 1-2 Weeks
    ETI 225-085 8100 Plus pH, mV & Temperature Meter
    (no reviews)
    £153.00 £127.50
    • Triple functionality - measures pH, temperature and mV
    • Interchangeable pH and temperature probes
    • Manual and automatic temperature compensation
    127 Reward Points
    Price Match Guarantee
    225-085
  18. Extech EC500 ExStik II Waterproof pH/Conductivity Meter
    Extech logo
    In Stock
    Extech EC500 ExStik II Waterproof pH/Conductivity Meter
    (1)
    £154.80 £129.00
    • Capable of storing 25 readings
    •  Provides graphical data on the LCD display
    • Lightweight and portable, use enhanced with EC510 kit (not included)
    129 Reward Points
    Price Match Guarantee
    EC500
  19. ETI 8100 pH & Temperature Meter Kit
    ETI logo
    3 In Stock
    ETI 8100 pH & Temperature Meter Kit
    (no reviews)
    £156.72 £130.60
    • Simultaneous measurements of pH and temperature
    • Kit includes pH/temperature probes, buffer solution and carrying case
    • One touch automatic recalibration using buffer solution
    130 Reward Points
    Price Match Guarantee
    860-810
  20. Extech Oyster-15 Oyster Series pH/mV/Temperature Meter Kit
    Extech logo
    Extech Oyster-15 Oyster Series pH/mV/Temperature Meter Kit
    (no reviews)
    £184.68 £153.90
    • Comes with Oyster-10 meter, electrodes and calibration buffers
    • Splash-proof housing on meter
    • Features audible beeper and min/max recall
    153 Reward Points
    Price Match Guarantee
    Oyster-15
  21. Extech EX800  3 in 1 Chlorine pH Temperature Kit
    Extech logo
    Extech EX800 3 in 1 Chlorine pH Temperature Kit
    (no reviews)
    £189.60 £158.00
    • Comes in a handy, solid, portable case
    • Features a CL200 meter and pH electrode
    • Electrodes work in liquids, semi-solids and solids
    158 Reward Points
    Price Match Guarantee
    EX800
  22. Extech CL200 ExStik Waterproof Chlorine Meter
    Extech logo
    Only 1 In Stock
    Extech CL200 ExStik Waterproof Chlorine Meter
    (no reviews)
    £190.80 £159.00
    • Total chlorine measurements
    • Unaffected by sample colour and turbidity
    • Can store up to 15 measurements
    159 Reward Points
    Price Match Guarantee
    CL200
  23. Extech EC510 Waterproof ExStik II pH/Conductivity Meter Kit
    Extech logo
    Extech EC510 Waterproof ExStik II pH/Conductivity Meter Kit
    (no reviews)
    £213.60 £178.00
    • RENEW feature which alerts users to replace electrode
    • Nine units of measurement
    • 25 labelled readings memory
    178 Reward Points
    Price Match Guarantee
    EC510
  24. Extech EX900 ExStik 4-in-1 Chlorine pH, ORP & Temperature Kit
    Extech logo
    Only 1 In Stock
    Extech EX900 ExStik 4-in-1 Chlorine pH, ORP & Temperature Kit
    (1)
    £214.80 £179.00
    • Comes with CL200 meter, electrodes and more
    • Four-in-one water quality meter
    • Flat surface electrodes for testing in liquids, semi-solids and solids
    179 Reward Points
    Price Match Guarantee
    EX900

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About pH Meters & Water Quality Testers

Perfect for use both in educational, industrial, and scientific environments, a pH/water quality tester is the ideal solution for accurately measuring the pH of substances or ensuring that water is safe for consumption.

Of course, pH testers aren't just for use in substances - many devices are also used to test the pH of food, or for evaluating the levels of acid/alkali inside semi-solid or solid materials. Soil pH meters are also commonly used in food production to ensure that soils are at the right levels for increasing maximum yield when growing crops, plants, or vegetation.

If you're regularly testing for different PHs, having an accurate, easy-to-read tester ensures that you can always maintain accurate readings of potentially dangerous substances. A PH tester is also ideal for use in schools, providing a more accurate alternative to using litmus paper in the science lab.

Most common pH meters work by the use of an electrode. When inserted into the target substance this electrode will create a current through that substance; the pH meter will then read this current, and display the overall acidity/alkalinity of the substance on the tester's screen. Proper maintenance of a pH electrode is essential in between testing procedures - they should be cleaned carefully, and kept stored in a regularly changed solution of a specific pH to maintain the efficiency of the pH electrode. Without proper care, the electrode will deteriorate much faster and will have to be replaced much more regularly.

It's also quite common for pH meters to be able to evaluate the overall temperature of the object/solution being tested at the same time as pH readings are being calculated. This is particularly useful when testing foodstuffs such as meat; these meat pH meters and other food meters can be used to accurately determine the pH of stored/cooked food, and are ideal for use everywhere from restaurants to supermarket refrigeration storage areas.

Got a swimming pool or a hot tub at home? pH meters are great tools for evaluating the delicate chemical balance used in these devices, and allow users to easily maintain and adjust the chemical balance as and when needed.

Generally, PH meters range in size, shape, and ability. For those on a budget, pen-sized PH meters are available, while we also stock a range of higher-priced PH meters which are more suited for technical environments such as laboratories. More expensive devices generally come with additional features such as temperature compensators; readings can be affected by temperature.

Water quality testers check to see if water is safe for consumption or human touch. These are essential for those who work regularly with both water and chemicals, allowing you, for example, to check that the correct levels of chlorine are present in water before it is sent out for use in homes and other areas.

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