Dissolved Oxygen Sensors

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YSI Dissolved Oxygen Monitoring

IQ SensorNet FDO Dissolved Oxygen Probes

The FDO is a luminescence-based, optical DO sensor for the IQ SensorNet process monitoring system. The FDO is a reliable, proven, long-term solution for continuous DO monitoring that can help optimize your aeration system and lower energy costs. Replaceable sensor cap provides a longer life and simple maintenance. A fast response cap (SC-FDO 701) is available for highly dynamic environments. Provide optimal conditions for nitrification and minimizing energy usage.

  • Options for seawater, freshwater and Class 1, Division 2 applications
  • Intelligent sensor cap; factory calibration data is automatically uploaded
  • Extremely long sensor cap life
  • 2-year warranty on probe and SC-FDO 700 sensor cap, 6-month warranty on SC-FDO 701 sensor cap
  • No electrodes or electrolyte or calibration required
  • 45 degree angle sensor cap eliminates over-estimate of DO due to bubbles bursting on the sensor cap

IQ SensorNet TriOxmatic Probes

The electrochemical method of detecting dissolved oxygen utilizes a semi-permeable membrane, an anode and cathode and an electrolytic solution.  The electrical current can be measured and correlates to the oxygen concentration.  The TriOxmatic sensor functions with a potentiostatically driven 3-electrode system.  Two silver electrodes and a gold cathode are in use.  One silver anode functions as a non-current bearing reference electrode, the other is the “live” anode.  The gold reference anode leads to improved signal stability and higher measurement accuracy.

  • SensReg function monitors the electrolytic solution for replacement needs
  • SensLeak function continually monitors for leakage in the membrane and provides an alert if leakage is detected
  • Fouling resistant membranes
  • No “break in” period needed
  • No long-term drift
  • Integrated lightning protection
  • Digital sensor technology retains calibrations


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