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Fast Response Time and Reduced Air Bubble Formation for OXYPro® MR / MRM

Oxygen Exchange Cap OEC30-PSt8-NAU

The Oxygen Exchange Cap with oxygen sensor type PSt8 is made of stainless steel and specifically designed for applications where a fast sensor response time is needed (< 3 sec.). It has a maximum measurement range of 0 - 20.9 % O2, and a detection limit of 0.007 % O2 / 3 ppb. The beveled tip reduces air bubble formation on the sensor during dissolved oxygen measurements. The cap is screwed to the top of the OXYPro® MR / MRM fitting to replace a used sensor. It is not autoclavable.

  • Maximum measurement range of 0 - 20.9 % O2
  • Fast response time (< 3 sec.)
  • Reduced air bubble formation
  • Easy exchange due to barcode calibration
  • Pressure resistant

Technical

SpecificationsOEC30-PSt8-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 - 10 % O2, 0 - 100 hPa, 0 - 4.5 mg/L
Max.**: 0 - 20.9 % O2, 0 - 200 hPa, 0 - 9.0 mg/L
Limit of detection*0.007 % O2,  0.07 hPa, 3 ppb
Resolution*0.007 % O2 ± 0.002 % O2, 0.023 % O2 ± 0.005 % O2, 2.314 % O2 ± 0.007 % O2
3 ppb ± 1 ppb, 10 ppb ± 2 ppb, 1000 ppb ± 3 ppb
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 environment (e. g. nitrogen 5.0, 1 % sodium sulfite solution) and a second calibration medium between 2 and 4 % oxygen
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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