Here at Gem Scientific, we offer high-quality water testing equipment from a range of trusted brands including Hanna InstrumentsHydrosenseIdexxRotronicSchaller and Aqualab. Our range offers products to suit an array of different budgets, allowing you to tailor your order to suit your individual requirements.

Designed to help you to complete your tasks to the highest possible standard, our water testing products come as part of a wider range of equipment that ensures the smooth running of your laboratory or workplace.

Our range of water testing equipment can be used within a wide range of industries, making it a versatile piece of equipment for your workplace. Our selection features legionella testing, benchtop water activity meters, handheld water activity meters and Idexx water microbiology testing and water sampling. Browse water testing meters, vessels, kits and analysers to find a product that best fits your requirements and provides you with an accurate reading time and time again.

  • Water Activity
    At Gem Scientific, we are proud to deliver an expert range of water activity meters, essential for food safety, quality control, and shelf-life assurance. Water activity (a_w) refers to the amount of unbound water in a product—a critical variable that impacts microbial growth, texture, stability, and nutritional quality. Measuring wtaer activity accurately allows food manufacturers to predict microbial risk, reduce spoilage, and support HACCP protocols across production and storage environments. Our product lineup includes advanced models such as the Aqualab Series 4TE water activity meter, as well as the Schaller Humimeter RH2 analyser, each designed for precision and ease of use. If you need help selecting the right water activity solution for your process, our knowledgeable team is ready to advise.
  • Specific Water Testing
    Specific water testing enables the targeted detection of harmful microorganisms and contaminants in drinking, environmental, and process water. Tests such as Colilert, Enterolert, and Pseudalert are widely used to identify the presence of coliforms, E. coli, enterococci, and Pseudomonas aeruginosa, providing rapid and reliable results for regulatory compliance and safety monitoring. Ideal for laboratories, utilities, and environmental monitoring teams, specific water testing solutions offer a dependable way to assess microbial water quality and support ongoing compliance with international safety standards.

Active filters

Everything from a single source for your wastewater control: digestion of sample cuvettes with the RD 125 thermoreactor, reliable sample analysis with the MD 600 photometer including interference filter and 120 pre-programmed methods including cost-effective reagents with extended measuring ranges and ValidCheck standard solutions for COD determination. In addition, you can check all important parameters of wastewater control with appropriate tube tests – from ammonium, nitrate and nitrite to nitrogen and phosphate.

Flexible thermoreactor for sample preparation of photometrical determination of COD, total chrome, total phosphate, total nitrogen and TOC. Digestion is possible with three temperature ranges and three pre-programmed reaction times.

  • Three Temperature Ranges
  • The reactor can operate optionally with 100°C, 120°C or 150°C – depending in each case on the sample to be prepared.
  • Three Different Reaction Times
  • Three different reaction times are available with 30, 60 and 120 minutes. Your advantage: Afterwards the unit switched itself off automatically.
  • Large Cuvette Shaft
  • Place up to 24 16-mm-round cuvettes in the RD 125.
  • Voltage Change Possible
  • The RD 125 can be used with various voltages: Choose 110 V and 220 V with the voltage selector on the back.

Thermostat LT200 for standard and special digestions. Pre-programmed for all standard digestions and freely programmable for user specific digestions. 2 separately controllable heating blocks with separate protection covers, both blocks each with 15 x 13mm holes.

Illuminated digital display for remaining time/temperature and operator guidance. 3 pre-programmed and 6 freely programmable storage spaces. Temperature settings between 37 and 150°C in 1°C steps, time setting between 1 and 480 min.

  • Great flexibility
  • Excellent reproducibility
  • Simple to use

Applications:

boiler water, industrial wastewater, municipal water, pre-treatment, and steam cycle

Thermostat LT200 for standard and special digestions. Pre-programmed for all standard digestions and freely programmable for user specific digestions. 9 x 13mm and 2 x 20mm holes. Integrated protection cover. Illuminated digital display for remaining time/temperature and operator guidance.

3 pre-programmed and 6 freely programmable storage spaces. Temperature settings between 37 and 150°C in 1°C steps, time setting between 1 and 480 min.

  • Great flexibility
  • Excellent reproducibility
  • Simple to use

Applications: boiler water, industrial wastewater, municipal water, pre-treatment, and steam cycle

Lovibond offers a wide range of single parameter Drop Test Kits for individual test requirements. They are for use in various water testing applications including potable water, process water, industrial boilers & cooling systems, swimming pool and waste water treatment. Drop Tests work by a simple colour change and are derived from laboratory burette methods.

The high quality LovibondÆ General Drop Test Kits and reagents are available in a wide range of parameter specific options to suit many analytical requirements. Each self-contained Kit is housed in its own rugged carry case and comes complete with all necessary equipment such as instructions, reagents, syringe and test bottle or test cell for 100 tests.

Derived from laboratory burette methods, the LovibondÆ drop test range forms an integral part of the analytical program. The reagents are quick to use and give results fast.

Ideal for mobile treatment engineers

Compact & portable design

Easy to follow instructions including pictograms

Complete with all necessary equipment

LovibondÆ offers a wide range of single parameter Drop Test Kits for individual test requirements. They are for use in various water testing applications including potable water, process water, industrial boilers & cooling systems, swimming pool and waste water treatment. Drop Tests work by a simple colour change and are derived from laboratory burette methods.

The high quality LovibondÆ General Drop Test Kits and reagents are available in a wide range of parameter specific options to suit many analytical requirements. Each self-contained Kit is housed in its own rugged carry case and comes complete with all necessary equipment such as instructions, reagents, syringe and test bottle or test cell for 100 tests.

Derived from laboratory burette methods, the LovibondÆ drop test range forms an integral part of the analytical program. The reagents are quick to use and give results fast.

Ideal for mobile treatment engineers

Compact & portable design

Easy to follow instructions including pictograms

Complete with all necessary equipment

LovibondÆ offers a wide range of single parameter Drop Test Kits for individual test requirements. They are for use in various water testing applications including potable water, process water, industrial boilers & cooling systems, swimming pool and waste water treatment. Drop Tests work by a simple colour change and are derived from laboratory burette methods.

The high quality LovibondÆ General Drop Test Kits and reagents are available in a wide range of parameter specific options to suit many analytical requirements. Each self-contained Kit is housed in its own rugged carry case and comes complete with all necessary equipment such as instructions, reagents, syringe and test bottle or test cell for 100 tests.

Derived from laboratory burette methods, the LovibondÆ drop test range forms an integral part of the analytical program. The reagents are quick to use and give results fast.

Ideal for mobile treatment engineers

Compact & portable design

Easy to follow instructions including pictograms

Complete with all necessary equipment

Lovibond offers a wide range of single parameter Drop Test Kits for individual test requirements. They are for use in various water testing applications including potable water, process water, industrial boilers & cooling systems, swimming pool and waste water treatment. Drop Tests work by a simple colour change and are derived from laboratory burette methods.

The high quality LovibondÆ General Drop Test Kits and reagents are available in a wide range of parameter specific options to suit many analytical requirements. Each self-contained Kit is housed in its own rugged carry case and comes complete with all necessary equipment such as instructions, reagents, syringe and test bottle or test cell for 100 tests.

Derived from laboratory burette methods, the Lovibond drop test range forms an integral part of the analytical program. The reagents are quick to use and give results fast.

Ideal for mobile treatment engineers

Compact & portable design

Easy to follow instructions including pictograms

Complete with all necessary equipment

This is an advanced portable photometer for the measurement of pH parameters in water. This meter offers a superior optical system that utilises a reference detector and narrow band interference filters for extremely fast and repeatable measurements. The photometer has an innovative optical system that offers superior performance in accuracy, repeatability and the short amount of time it takes to perform a measurement. This compact, waterproof meter is extremely user friendly with a tutorial mode that walks the user graphically, step by step, in performing a measurement. The use of a backlit dot matrix LED allows the use of virtual keys which makes the operation of the meter very intuitive including selecting different methods, reviewing GLP data, recalling the last 50 measurements, and customising the meter to user preferences.

  • Each photometer is delivered in a cardboard box and is supplied with:

ProfiLine pH3110

£635.00 vat excl.

£762.00 vat Inc.

Availability: 9 In Stock

For testing of waste water.

  • Easy-to-operate, robust pH/mV-meter with large LCD-display, for mobile routine measurement.
  • Meter in carry case with
  • pH-sensor SenTix™ 41
  • buffer solution STP 4 and STP 7
  • stand, beaker
  • short instruction manual
  • CD-ROM and batteries
  • Handy case sets for field applications
  • The ProfiLine handhelds are available as single instruments in a case without measurement accessories, but also as sets supporting individual application requirements.
  • The case also serves as a small field laboratory.

PAWKIT Portable Water Activity Meter

£1,284.00 vat excl.

£1,540.80 vat Inc.

Availability: 48 In Stock
  • Completely portable
  • Pocket-sized about 4 x 3 x 1 inch
  • Lightweight (4 ounces)
  • Runs for about 3 years on 2 button cell batteries
  • Easy two-point calibration
  • Uses regular AQUALAB cups and standards

Humimeter RH2 Water Activity Meter/Analyser Kit

£2,096.43 vat excl.

£2,515.72 vat Inc.

Availability: Out of stock
  • Easy to use
  • Optimal documentation of your quality
  • Long stable humidity sensor
  • Easy data storage at the portable moisture meter
  • Analysis on PC and printer available
  • Automatic datalog for up to 10,000 logs with measuring point report
  • Online-function, Hold function, manual data memory
  • Relative humidity, absolute humidity, dew point, equilibrium moisture content, aw value

pHotoFlex 'Multi' Colorimeter

£3,060.00 vat excl.

£3,672.00 vat Inc.

Availability: 10 In Stock
  • More than 150 programs for routine analysis
  • Test kits for every demand: from high precisely to easy, fast and economic
  • Storage with Identification Number (ID)
  • Data filter for easy selection of data sets
  • Electrochemical pH-measurement from pH 0–16.00 (± 0.01) for Standard DIN pH-electrodes
  • Automatic Temperature Compensation (ATC)
  • Redox Measurement
  • 1-3 point calibration with calibration interval setting and calibration protocol
  • IR light source acc. to DIN 27027/ISO 7027
  • Turbidity measurement range from 0.01-1100 NTU/FNU providing drinking water accuracy
  • Longterm stable AMCO Clear Standards with ±1% manufacturing accuracy
  • The most versatile colorimeter for field and lab

Portable and robust, micro-processor-controlled colorimeter with power-saving LED technology. Pre-programmed with 90 Hach Methods. The handheld colorimeter allows for quick and easy access to your most frequently used testing methods in less than four clicks. This colorimeter is waterproof, dustproof, shock resistant, and has been drop tested for greater quality assurance. This instrument comes with an intuitive user interface, a large data storage and a built-in USB port for the easy transfer of information. The handheld colorimeter also helps satisfying core testing needs by offering at least 90 of the most common testing parameters. Combining all these features with a push button backlit display for use in low light areas, you have a handheld colorimeter which is field-ready, and makes testing in harsh field environments a little less challenging.

  • Rugged construction
  • Designed for use in the field
  • Easy to use
  • Reliable results without a main connection
  • Configured for immediate use

Hach DR3900 VIS Spectral Photometer With RFID Technology

£7,256.98 vat excl.

£8,708.38 vat Inc.

Availability: Out of stock

The DR3900 is a benchtop visible spectrum (320 - 1100 nm), split beam spectrophotometer with over 220 pre-programmed methods optimised for laboratory water analysis. With your daily routine of water analysis in mind, the DR3900 spectrophotometer is optimised for safe processes and accurate results.

  • Simple preparation - boxes and cuvettes are colour-coded for fast and easy parameter and range recognition, step-by-step illustrated test methods are printed on the box as quick reference or can be called up in the instrument menu
  • Use RFID technology to enable reliable communication with the sample taker and the samples
  • Fast execution
  • Comprehensive documentation
  • Store hundreds of user-determined methods to tailor the DR3900 to everyday needs
  • Optimise and customise the method portfolio, combined with regular software updates and Claros connectivity
  • Measurement results are documented on the detailed level with timestamp, operator ID, absorbance reading, and calculated concentration, the 2D barcode delivers the lot number and expiry date, logged with every result
  • Connects to Claros, Hach's innovative Water Intelligence System, enabling you to seamlessly connect and manage instruments, data, and process, resulting in greater confidence in your data and improved efficiency in your operations
  • Includes spectrophotometer DR3900, adapter "A" for 1" round + Accuvac/1 cm rectangular cuvettes, manual, power supply 100 - 240V, 47 - 63Hz, operator RFID tag
  • Fast readings in 5 minutes or less
  • Accurate to ±0.003 aw
  • Verifiable with independent salt standards
  • Easy to use - precise measurements with minimal training
  • Portable design weighs just 3kg (7lbs)
  • Secure administrative control over calibration and sample data
  • Used by 80 of the top 100 food companies