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Oxygen Interface Electronics – OXY-FLEX-0-H


OXY-Flex Oxygen Analyser
  • High accuracy linear output
  • Externally triggered automatic or manual calibration
  • Three user-configurable outputs; 4-20mA and    0-10Vdc or RS232


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Supply voltage 24Vdc +/- 10%
Supply current 500mA max. at 24Vdc
Digital output RS232
Analogue output 4-20mA; load 600Ω max or
0-10Vdc; load 10kΩ min
Housing temperature limits:
    Storage: -10 to 85⁰C
    Operating: -10 to 85⁰C
Permissible gas temperatures (probe tip):
    Standard: -100 to 250⁰C
    High: -100 to 400⁰C
Gas flow rate 0 to 10 m/s
Permissible acceleration
    Repetitive 5g
    Incidental 30g


Oxygen range (analogue output)² 0.1¹ to 25% O₂ or
0.1¹ to 100% O₂
Oxygen range (RS232 output) 0.1¹ and 100% O₂
Accuracy after calibration³⁴ 1% O₂
Repeatability after calibration³ 0.5% O₂
Output resolution
Analogue 4-20mA 0.01mA
Analogue 0-10Vdc 0.01V
Digital RS232 0.01% O₂
Response time
Warm up time (prior to sensor operation) 60s
Output stabilisation time ~ 180s



¹Prolonged operation below 0.1% O₂ can damage the sensing element.

²Range selectable by altering the position of the jumper links on the PCB; refer to PCB layout on page 3 of the datasheet.

³Assuming barometric pressure (BP) remains constant.

⁴As the O₂ sensor measures the partial pressure of oxygen (PPO₂) within the measurement gas deviations in the BP from that present during calibration will cause readout errors proportional to the change. EG. if sensor reads 21% O₂ at 1013.25mbar and the BP increases by 1%,the sensor readout will also increase by 1% to 21.21% O₂.


Housing: Amphenol Ecomate C016 30C006 100 12
Mating Connector: Binder 99-4218-00-07


Pin Assignment
1 24Vdc +/-10%
3 Calibrate
4 Cycle
5 4-20mA/RS232 Tx (see note on datasheet)
6 0-10Vdc/RS232 Rx (see note on datasheet)
CENTRE Housing/Probe Earth


  • Zirconium dioxide technology
  • High accuracy linear output
  • Configurable outputs; 4-20mA and 0-10Vdc or RS232 comms interface
  • Selectable output measuring ranges; 0-25% O₂ or 0-100% O₂ or fully adjustable via RS232
  • Can be calibrated in fresh air (20.7% O₂) or in any other known O₂ concentration
  • Housed in a sealed die-cast aluminium housing with attached oxygen sensor probe and amphenol acomate connector
  • Works at temperatures from -100 to 400⁰C
  • Various probe lengths available


  • Long life, non-depleting technology
  • No reference gas required creating the ability to measure a wide oxygen range
  • Removes the need for customers to implement their own electronics
  • No need for temperature stabilisation
  • Linear output signal
  • Externally triggered automatic or manual single point calibration removing any effect of barometric pressure
  • Can be used in high pressure and temperature environments
  • No need for external heater supply
  • Full technical and application support available
  • This field is for validation purposes and should be left unchanged.