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Dissolved Oxygen : IP67 Waterproof Portable DO Meter - the ideal choice for Dissolved Oxygen measurements in fish farming and the fish farming industry Scotland and world wide.

The CyberScan DO300 Dissolved Oxygen Meter is the ideal choice for anyone requiring to take Dissolved Oxygen measurements in rugged outdoor field work i.e. Fish farming or in situ Plant and Process applications - being waterproof and robustly built, the chance of accidental damage is virtually eliminated.  Not only is this instrument waterproof but in the event of accidentally dropping it into liquid, it will float to facilitate easy retrieval. These accurate instruments have many advanced features such as : Automatically compensates Salinity and Barometric pressure after manual input for increased accuracy, Independent 100% and zero adjustment calibrations give meter high accuracy across entire measurement range, No meter warm up required with Galvanic Cell - takes measurements immediately and produces quick response, Displays electrode diagnosis gives slope, zero offset and millivolt values to help determine when to service or replace electrode

Applications for the CyberScan DO300 meter include :

Fish Farming & Aquaculture : 

Fish Farming - Monitoring oxygen levels in catfish and shrimp farming; game stocking ponds; ornamental fish tanks and ponds; and all main fish farming applications. 

Industrial : 

Routine testing of industrial effluent processing and water purification on plant water intake and discharge, sewage purification, wastewater and water treatment, recirculating systems and industrial process systems.

Environmental : 

Water quality testing, monitor health of aquatic ecosystems, survey surface and ground water drinking supplies.

Educational :

Quick and accurate Dissolved Oxygen readings in analytical, clinical and life science laboratories, Universities, Colleges and schools.  

Main Features :

  • Waterproof and Dustproof Housing - IP67 rated, ideal for rugged harsh conditions. Plus it floats! 
  • Automatically Compensates Salinity and Barometric Pressure after manual input for increased accuracy 
  • Independent 100% and Zero Adjustment Calibrations give meter high accuracy across entire measurement range 
  • No Meter Warm-up Required with Galvanic Cell - takes measurements immediately and produces quick response 
  • Displays Electrode Diagnosis gives slope, zero offset and millivolt values to help determine when to service or replace electrode 
  • Adjustable Backlit Display for viewing readings conveniently in poorly lit places 
  • Ready Indicator prompts whenever reading stabilizes 
  • Hold Function momentarily freezes reading for easy viewing and recording 
  • Auto-Power Off saves battery power after non-use 
  • Self-Diagnostic with message codes for easy troubleshooting 
  • Large Custom LCD provides optimum viewing with user-friendly icons 
  • Meter Kit - contains everything you need for calibration and measurement in a rugged carrying case


Product Code EC-DOWP300
Dissolved Oxygen Range 0 to 19.9 mg/l or ppm
Resolution & Accuracy 0.01 mg/l, 0.1 ppm & 1.5% Full Scale
% Saturation of Oxygen 0.0 to 199.9 %
Resolution & Accuracy 0.1 % & 1.5% Full Scale
Temperature Range 0.0 to 100.0 C (32.0 to 212 F)
Resolution & Accuracy 0.1 C (0.1 F) & 0.3 C (0.5 F)
Salinity Correction 0.0 to 50.0 ppt
Barometric Pressure Correction 500 to 1499 mm Hg or 66.6 to 199.9 kPA
Method Manual input for automatic correction
No. of DO Calibration Points Single point at 100% (in saturated air) or 
in air saturated water
Temperature Compensation Automatic / Manual (0 to 100 C)
Back-lit Display Yes
Memory 50 sets
Special Functions Averaging/Stability; Self-diagnostic; Electrode characteristics; Hold & Auto-Power Off after20 minutes
Power 4 'AAA' x 1.4V batteries

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We are proud to announce the pH600 series offering mega-memory capabilities: up to 500 data-sets, and gives you lab accuracy of up to 0.001 resolution. This versatile instrument is the ideal choice in today's demanding Laboratory and field environments with features such as, Wireless and cable-free data transfer with infrared IrDA technology. Comes with PC-based Complimentary Data Acquisition Software for hassle-free data import and report-generation into any popular spreadsheet programs of your choice. 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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