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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.

Find out more about pH Meters & Water Quality Testers below.

Extech EC170 Salinity/Temperature Meter
In Stock : Get It Next Working Day*
Extech EC170 Salinity/Temperature Meter
£59.50
£71.40 inc. vat
  • Dual measurements of salinity and temperature
  • Autoranging with 2 ranges of measurement
  • Waterproof design meets IP65 standards
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Extech EC150 Conductivity / TDS / Temperature Meter
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Extech EC150 Conductivity / TDS / Temperature Meter
£59.50
£71.40 inc. vat
  • Triple function meter measures conductivity, TDS and temperature
  • Fully waterproof with IP65 rating
  • Simultaneous measurements of conductivity or TDS + temperature
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Extech PH90 Waterproof pH and Temperature Meter
Extech PH90 Waterproof pH and Temperature Meter
£66.49
£79.79 inc. vat
  • Measures pH and temperature levels simultaneously
  • Use with liquids, semi-solids and solids
  • High quality non-glass electrode resists breaking and clogging
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Extech PH100 ExStik pH Meter
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Extech PH100 ExStik pH Meter
£84.45
£101.34 inc. vat
  • 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
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Extech EC400 ExStik II Conductivity, TDS & Salinity Meter
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Extech EC400 ExStik II Conductivity, TDS & Salinity Meter
£92.00
£110.40 inc. vat
  • Measures TDS, conductivity, salinity and temperature
  • Automatic Temperature Compensation of 2%
  • Stores up to 25 readings
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Extech PH110 ExStik Refillable pH Meter
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Extech PH110 ExStik Refillable pH Meter
£92.00
£110.40 inc. vat
  • Unique device with refillable electrode
  • No need to worry about shelf life
  • Usable with one hand
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Extech RE300 ExStik ORP Meter
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Extech RE300 ExStik ORP Meter
£96.90
£116.28 inc. vat
  • Takes pH measurements up to two decimal places
  • Analog bar graph displays pH levels
  • Smart Chip technology 
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Extech PH220-C Waterproof Palm pH Meter Kit
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Extech PH220-C Waterproof Palm pH Meter Kit
£129.00
£154.80 inc. vat
  • Totally waterproof unit
  • Ultra-portable
  • Comes with pH electrode, holster, battery and pH buffers
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Extech EC500 ExStik II Waterproof pH/Conductivity Meter
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Extech EC500 ExStik II Waterproof pH/Conductivity Meter
£135.00
£162.00 inc. vat
  • Capable of storing 25 readings
  •  Provides graphical data on the LCD display
  • Lightweight and portable, use enhanced with EC510 kit (not included)
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Extech Oyster-15 Oyster Series pH/mV/Temperature Meter Kit
Extech Oyster-15 Oyster Series pH/mV/Temperature Meter Kit
£149.50
£179.40 inc. vat
  • Comes with Oyster-10 meter, electrodes and calibration buffers
  • Splash-proof housing on meter
  • Features audible beeper and min/max recall
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Extech CL200 ExStik Waterproof Chlorine Meter
Extech CL200 ExStik Waterproof Chlorine Meter
£170.20
£204.24 inc. vat
  • Total chlorine measurements
  • Unaffected by sample colour and turbidity
  • Can store up to 15 measurements
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Extech EX800  3 in 1 Chlorine pH Temperature Kit
Extech EX800 3 in 1 Chlorine pH Temperature Kit
£170.20
£204.24 inc. vat
  • Comes in a handy, solid, portable case
  • Features a CL200 meter and pH electrode
  • Electrodes work in liquids, semi-solids and solids
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Extech EC510 Waterproof ExStik II pH/Conductivity Meter Kit
Extech EC510 Waterproof ExStik II pH/Conductivity Meter Kit
£178.00
£213.60 inc. vat
  • RENEW feature which alerts users to replace electrode
  • Nine units of measurement
  • 25 labelled readings memory
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Extech EX900 ExStik 4-in-1 Chlorine pH, ORP & Temperature Kit
In Stock : Get It Next Working Day*
Extech EX900 ExStik 4-in-1 Chlorine pH, ORP & Temperature Kit
£202.80
£243.36 inc. vat
  • Comes with CL200 meter, electrodes and more
  • Four-in-one water quality meter
  • Flat surface electrodes for testing in liquids, semi-solids and solids
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Extech PH300 Waterproof pH/mV/Temperature Kit
Extech PH300 Waterproof pH/mV/Temperature Kit
£210.90
£253.08 inc. vat
  • Automatic temperature compensation included
  • Measures pH, mV and temperature
  • Waterproof casing
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Extech DO600 Waterproof  ExStik II Dissolved Oxygen Meter
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Extech DO600 Waterproof ExStik II Dissolved Oxygen Meter
£259.80
£311.76 inc. vat
  • Displays oxygen levels as both saturation and concentration
  • Analogue bar graph and digital display
  • Self-calibrating
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Extech 407510 Heavy Duty Dissolved Oxygen Meter
Stock Due : Estimated 1-2 Weeks
Extech 407510 Heavy Duty Dissolved Oxygen Meter
£370.00
£444.00 inc. vat
  • Measure dissolved oxygen with ease
  • Measures temperatures
  • RS-232 interface allows you to interact with test data on PC
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Extech EC600 Waterproof Conductivity Kit
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Extech EC600 Waterproof Conductivity Kit
£390.10
£468.12 inc. vat
  • Takes six different measurements
  • Microprocessor calibrates automatically
  • Stores up to 300 measurements
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Extech TB400 Portable Turbidity Meter
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Extech TB400 Portable Turbidity Meter
£435.40
£522.48 inc. vat
  • Measures the turbidity of a liquid sample
  • Range up to 1000NTU
  • Battery powered - can be used on-site
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Extech SDL150 Dissolved Oxygen Meter/Datalogger
Extech SDL150 Dissolved Oxygen Meter/Datalogger
£447.10
£536.52 inc. vat
  • Dual backlit display
  • Supplied SD card
  • Dissolved oxygen testing from 0 to 20mg/L
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Extech DO700 Portable Dissolved Oxygen Meter
Extech DO700 Portable Dissolved Oxygen Meter
£723.90
£868.68 inc. vat
  • Meets IP57 standards
  • Measures concentration, saturation, PH, mV, conductivity and more
  • Large, dual LCD display
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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.