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Instruments, Controllers& Sensors


Portable Turbidity meters

Bench Turbidity meters

Online Turbidity

Flame Photometry

BWB-1 Flame Photometer

Dissolved Oxygen (DO)

Handheld Dissolved Oxygen IP67 Dissolved Oxygen Meters

Bench Dissolved Oxygen Meters

Industrial Dissolved Oxygen

Dissolved Oxygen Probes

DO Probe Conditioner


Portable pH Testers

Handheld pH Meters

Waterproof pH Meters

Bench pH Meters

Industrial pH Controllers

Replacement pH Electrodes


Free Chlorine

Total Chlorine

Cyanuric Acid

Redox (ORP)

Portable Redox Testers

Handheld Redox Meters

Waterproof ORP Meters

Bench ORP Meters

Industrial ORP Controllers

Replacement Metal ORP Probes

Conductivity (EC)

Portable Conductivity Testers

Handheld Conductivity Meters

Waterproof Conductivity Meters

Bench Conductivity Meters

Industrial Conductivity Meters

Replacement Conductivity Cells

Total Dissolved Solids (TDS)

Portable TDS Testers

Handheld TDS Meters

Waterproof TDS Meters

Bench TDS Meters

Industrial TDS Controllers

Replacement Cells

Ion Concentration

Handheld Ion Meters

Waterproof Ion Meters

Bench Ion Meters

Ion Selective Electrodes (ISE)


Portable Salinity Testers

Handheld Salinity Meters

Bench Salinity Meters

Salinity Sensors

Multi-parameter Bench Meters

Please click above to view this range

Multifunctional Controller


Chlorine Dioxide

Paracetic Acid

Hydrogen Peroxide



Bench Resistivity Meters

Industrial Resistivity Controller

Resistivity Cells

Electrochemical Sensors

pH, Reference, Conductivity, Redox, Dissolved Oxygen, Ion Selective Electrodes, Calibration Solutions, Hollow Cathode Lamps and

Deuterium Lamps

What is a Colorimeter?

A colorimeter is an instrument used for colour measurement based on optical comparison with standard colours. A colorimeter determines the relative percentages of light absorbed at different wavelengths - just like a spectrophotometer. Photocells measure the intensity of light transmitted (viz. reflected) by the sample at a number of wavelength bands. The intensity is related to the amount of a given colorant in (or on) the sample. The higher the colorant concentration, the lower the transmitted intensity.

What products do R.M.S Ltd offer for Colour Measurement?

Portable Hand Held Instruments:

Our New C401 Colorimeter is the latest laboratory grade microprocessor-based meter for the measurement of Free Chlorine, Total Chlorine, Cyanuric Acid and pH. Designed to deliver quick, accurate and repeatable results, the meter comes with large custom-made LCD and user-friendly self-diagnostic warning messages. Meters are supplied with reagents and sample vials in rugged
carrying cases for swift testing on the go. Be it for swimming pools, spas, industrial wastewater, municipal treated water monitoring, paper and pulp mills or water conditioning control, you can select from the C401, C301, C201, C101 or C102 models.

Please Click on the picture below to view in detail:

Links of interest
Contact Us

We are proud to announce the launch of the Worlds First CFR 21 Compliant - Windows CE Driven Multi-Parameter 6000 Range of Bench Meters. Ideal for use in industries such as Pharmaceutical, Food & Drug Manufacture and Health & Human Services. Please click here for details.

We accept all major credit/debit cards - please contact us for our best possible prices!; any questions? Why not try our Technical Area where you will find an in-depth explanation of many relevant aspects within the field of electrochemistry! more..

Russell Mainstream Supply Ltd.

Cameron House, 8 Crown Square, Kingskettle, Cupar, Fife, KY15 7PW

Phone: +44 (0)1337 831192

Fax: +44 (0)1337 371192


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