Ultra-Trace Oxygen Sensor Replacement for OIM and OXYPro® UT / UTM

Oxygen Exchange Cap OEC-PSt9-NAU

A PSt9 sensor is integrated in a stainless steel cap, which can be used to replace a used sensor on an OIM (Oxygen Probe for In-line Measurement) or the OXYPro® UT / UTM. The ultra-trace sensor has a measurement range of 0 - 200 ppmv oxygen with a detection limit of 0.5 ppmv, so even smallest gaseous oxygen traces can be detected. The sensor is not autoclavable. It is ideally suited for monitoring oxygen sensitive applications or production processes in different industries.

  • Measurements down to 0.5 ppmv oxygen (gaseous O2 only!)
  • Fast response time
  • Easy exchange due to barcode calibration
  • Pressure resistant
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*at 20 °C, 960 - 980 hPa; humidified gas mixture
**determined changing from 20.9 % oxygen gas to nitrogen 5.0
Measurement range*0 - 200 ppmv O2
Limit of detection*0.5 ppmv O2
Resolution*1 ± 0.15 ppmv O2, 100 ± 0.8 ppmv O2, 200 ± 1.5 ppmv O2
Response time (t90)**< 10 sec.
CompatibilityGas phase only!
No cross-sensitivity toCO2, H2S, SO2
Cross-sensitivity toChlorine gas
Organic solvents such as pure acetone, toluene, chloroform or methylene chloride
CalibrationTwo-point calibration in oxygen-free environment (e. g. nitrogen 5.0) and a second calibration medium between 100 and 200 ppmv oxygen
Storage stability5 years provided the sensor is stored at room temperature in dry conditions and in the dark
Pressure resistance*3 bar
Temperature range operation0 °C to + 40 °C
Temperature range storage- 10 °C to + 70  °C
VariantUSP Class VI compatible

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