Zirconia Oxygen Sensor System

Zirconia Oxygen Sensor System - CO2 Meter
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The Zirconia Oxygen Sensor System offers a complete oxygen level measurement solution removing the need for customers to develop their own electronics. It can be used in combustion control systems, coal, oil, gas, biomass and in oxygen generation systems.

The system employs a well-proven, zirconium dioxide element at its heart and, due to its innovative design, does not require a reference gas. This, along with its rugged stainless steel construction means the sensor can be used in extreme temperatures and aggressive environments.

The oxygen sensors use a unique closed-loop measurement system. While the sensor continuously measures the oxygen level, a heartbeat signal is also generated, providing an immediate warning of any failures.

The sensor is housed in a short probe with an M18x1.5mm thread, making installation quick and easy. The oxygen sensor can operate in temperatures ranging from -100°C to 250°C and has a lifetime of up to 10 years (depending on the application).

When connected to the OXY-LC interface board, the Zirconia oxygen sensor can measure oxygen concentrations of 0.1% to 25% or  0.1% to 100% with a 4-20mA analog output. (See Sensor and Interface Selection Guide)


  • Zirconium dioxide technology
  • Interface electronics included
  • Integral heating element
  • Non-depleting technology
  • Linear output signal
  • M18x1.5 screw mounting
  • All stainless steel construction both internally and externally
  • Variety of probe mounting positions available; 28mm, 45mm & 55mm


Zirconia Oxygen Sensor System - consists of SST’s fast response (<4s T90) zirconium dioxide (ZrO₂) screw fit sensor in conjunction with the OXY-LC oxygen sensor interface board. 

(Please Note, Probe and Sensor Interface Board must be purchased separately for Sensor System)

OXY-02S-FR-T2-18BM-C - Zirconia Probe -  zirconium dioxide oxygen sensor that holds a 28mm long length for easy install.

OXY-02S-FR-T2-18A-003 - Zirconia Probe -  zirconium dioxide oxygen sensor that holds a 55mm long length for easy install.

OXY-LC-A25-455 Oxygen Sensor Interface Board - offers a complete 0-25% oxygen measurement solution, removing the need for customers to develop their own electronics. 

OXY-LC-V25-455 Oxygen Sensor Interface Board - offers a complete 0-25% oxygen measurement solution, with 0-10V, and 4.55V

OXY-LC-V100-455 Oxygen Sensor Interface Board - offers a complete 0-100% oxygen measurement solution, with 0-10V, and 4.55V.

OXY-LC-A100-455 Oxygen Sensor Interface Board - offers a complete 0-100% oxygen measurement solution, with 4-20mA, and 4.55V.

OXY-LC-485 - offers 25% or 100% oxygen ranges, including 4-20mA, and RS485 digital output.


  • Oxygen Range: 0.1-25% 
  • Accuracy after calibration: 0.5%
  • Output resolution: 0.01%
  • Response time (10-90% step): < 4s
  • Operating Temperature Range: -30°C to +70°C
  • Gas Temperature Range: -100°C to +250°C
  • Initial warm-up time (till stable output): 5-10 mins
  • Supply voltage - RS485 output variant: 8-28VDC
  • Supply voltage - Analog output variants: 20-28VDC
  • Supply current: 600mA max. at 24VDC, 1.2A max. at 12VDC
  • Digital output: RS485 (Modbus RTU)
  • Analog Output: 4-20mA; load 600Ω max or 0—10VDC; load 10kΩ min
  • Pump impedance at 700°C1: <6kΩ
  • Permissible gas temperature: -100°C to +250°C
  • Gas flow rate2: 0—10m/s
  • Operating pressure limits: 260-1260mbar absolute 
  • Mounting thread: M18 X 1.5


    • 90 days - See CO2Meter Terms and Conditions.
    • Data Sheets

    • Manuals

    • Technical Documents

    • Videos

    • Additional Resources

    • Case Studies

    Customer Reviews

    Based on 1 review
    Russell Barton
    premature question

    Given you just shipped the devices today, commenting now is premature.
    But, we have purchased these same devices previously, and they work well.,

    "Easy to install, easy to set up, and easy calibration - just what I was looking for."

    - Phillip Farrar
    Water Plant Superintendent

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