PST Zirconium Dioxide Sensors are used when measuring ambient gas. They use a unique closed loop measurement system, and continuously measure oxygen levels while also generating a heartbeat signal providing an immediate failure warning.

The miniature zirconia oxygen sensor can be PCB mounted and works by immersing the complete sensor in the atmosphere to be measured.

Non-depleting cell technology provides a long operating life, and no reference gas is required. Single point calibration can be easily performed in any known gas, including fresh air.

At 12mm in diameter, the miniature O2 sensor is perfect for applications where space is limited. The sensor provides two response time options: Standard at 15 seconds, and Fast at 4 seconds.


  • Zirconium dioxide technology
  • Operated using remote electronics
  • Integral sensing element
  • Stainless steel construction
  • High accuracy
  • Operating oxygen range from 0.1% to 100%
  • Temperature range of -100⁰C – 250⁰C.