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Fast Response Time and Reduced Air Bubble Formation for OXYPro® WR / WRM

Oxygen Exchange Cap OEC30-PSt7-NAU

A wide range PSt7 sensor is integrated in a beveled stainless steel cap. This cap reduces air bubble formation on the sensor. It has a very fast response time (< 3 sec.) and a maximum measurement range of 0 - 100 % O2 (detection limit 0.03 % O2 / 20 ppb). The OEC30-PSt7-NAU is screwed to the OXYPro® WR / WRM housing to replace a used sensor and can be calibrated with one fast barcode scan. This sensor cap is not autoclavable. 

  • Maximum measurement range of 0 - 100 % O2
  • Reduced air bubble formation
  • Fast response time (< 3 sec.)
  • Easy exchange due to barcode calibration
  • Pressure resistant
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Technical

SpecificationsOEC30-PSt7-NAU-OIW
*at 20 °C, 960 - 980 hPa; humidified gas mixture
** after customized calibration
***determined changing from 20.9 % oxygen gas to nitrogen 5.0
****determined changing from air-saturated water to a freshly prepared 1 % sodium sulfite solution
Measurement range*Optimal: 0 - 50 % O2, 0 - 500 hPa, 0 - 22.5 mg/L
Max.**: 0 - 100 % O2, 0 - 1000 hPa, 0 - 45.0 mg/L
Limit of detection*0.03 % O2, 0.3 hPa, 0.015 mg/L
Resolution*1 % O2 ± 0.02 % O2, 20.9 % O2 ± 0.1 % O2
0.4 mg/L ± 0.009 mg/L, 9 mg/L ± 0.04 mg/L
Response time (t90)
Gaseous O2***
Dissolved O2****

< 3 sec.
< 3 sec.
Properties
CompatibilityAqueous solutions, ethanol, methanol
No cross-sensitivity topH 1 - 14, CO2, H2S, SO2, ionic species
Cross-sensitivity toChlorine gas
Organic solvents such as pure acetone, toluene, chloroform or methylene chloride
Cleaning procedure3 % H2O2, acidic agents (HCl, H2SO4) max. 4 - 5 %
Cleaning agents containing ClO2 at room temperature
CalibrationTwo-point calibration in oxygen-free (e. g. nitrogen 5.0, 1 % sodium sulfite solution) and air-saturated environment (20.9 % oxygen, air-saturated water)
Storage stability5 years provided the sensor material is stored at room temperature in dry conditions and in the dark
Pressure resistance*10 mbar up to 12 bar
Temperature range operationOptimal: 0 °C to + 50 °C
Max.: - 10 °C to + 70 °C
Temperature range storageOptimal: room temperature (+ 20 °C ± 5  °C)
Max.: 0 °C to + 70 °C

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