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Instruments, Controllers & Sensors




Portable Turbidity meters

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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

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Free Chlorine

Total Chlorine

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Redox (ORP)

Portable Redox Testers

Handheld Redox Meters

Waterproof ORP Meters

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Conductivity (EC)

Portable Conductivity Testers

Handheld Conductivity Meters

Waterproof Conductivity Meters

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Total Dissolved Solids (TDS)

Portable TDS Testers

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Ion Concentration

Handheld Ion Meters

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Portable Salinity Testers

Handheld Salinity Meters

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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

Water Pollution Detection : Portable Redox (ORP) Testers (ORPScan)

Our IP67 pocket-sized waterproof Redox meters are ideal for detecting water pollution. They are the WORLD'S FIRST ORP testers to utilize user-replaceable Redox electrodes to enhance the useful lifespan of the instrument. These handy accurate testers can be used for a wide range of Redox applications ranging from ORP measurements in water purification and drinking water processes to monitoring ozone systems (+900 mV approx.) and free chlorine activity (+300 mV approx.) in pools, spas, and cooling waters.

Applications for the ORPScan meter include :

Industrial : 

Chromate reduction (+200 mV approx.), Cyanide oxidation (+300 mV approx.), Pulp bleaching (+900 mV approx.)

Water treatment : 

Monitor ozone systems (+900 mV approx.), Check free chlorine activity (+300 mV approx. in pools, spas, and cooling waters), Water purification and drinking water (+300 mV), Aquarium monitoring, Water pollution monitoring

Main Features :

  • Waterproof, Dustproof Housing - IP67 rated, maintains the integrity of your tester even in harsh field conditions.
  • User-Replaceable Sensor - reuse the same meter body many times
  • Microprocessor-based Functions - for fast, stable readings
  • Double Junction Electrode - for significantly longer electrode life, especially for harsh chemicals
  • Push-Button Offset Adjustment for easy standardization to known work standard
  • Auto-Power Off saves battery power after non-use
  • Hold Function freezes reading momentarily for easy viewing and recording
  • Self-Diagnostic with message codes for easy troubleshooting
  • Wide Platinum Band Electrode - for quick checking and optimum performance
  • Valox® sensor housing for good chemical compatibility and durability


Product Code

ORP Range -99 to 1000 mV
Resolution 1 mV
Accuracy ±2 mV
No. of Calibration Points 1 (±150 mV offset)
Special Functions Self-diagnostic; Hold;  Auto-Power Off after 8.5 minutes
Power Requirements 4 x 1.4V button cell batteries; >100 hours

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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


Email: Sales@rmprocesscontrol.co.uk 



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