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Replacement Oxygen Sensor for OXYPro® WR / WRM

Oxygen Exchange Cap OEC-PSt7-YAU

The Oxygen Exchange Cap is made of stainless steel and has an integrated sensor type PSt7. The sensor has a maximum measurement range of 0 - 100 % O2, and a detection limit of 0.03 % O2. It stands steam sterilization and cleaning in place. The OEC-PSt7-YAU is available in different versions: USP Class VI compatible (YOP) for bioprocess monitoring, safe for food applications (CAF), or with a hydrophobic Teflon coating (PTFE) for measurements in aggressive environments. The OEC can be screwed to the top of the OXYPro® WR / WRM fitting. Exchange of a used sensor is made easy as sensor calibration can be done via one fast barcode scan.

  • Maximum measurement range of 0 - 100 % O2
  • Different versions: USP Class VI compatible, food applications, aggressive environments
  • Stands SIP (max. + 140 °C, 1.5 atm) & CIP (2 % NaOH, + 80 °C)
  • Easy exchange due to barcode calibration
  • Pressure resistant
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Technical

SpecificationsOEC-PSt7-YAU-YOP
OEC-PSt7-YAU-CAF
OEC-PSt7-YAU-PTFE
*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****

< 10 sec.
< 30 sec.

< 15 sec.
< 40 sec.

< 85 sec.
< 100 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
Steam sterilization (max. + 140 °C, 1.5 atm)YesYesYes
Cleaning in place (CIP) (+ 80 °C, 2 % NaOH)YesYesYes
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 resistance10 mbar up to 12 bar
Temperature range operationOptimal: 0 °C to + 50  °C
Max.: - 40 °C to + 90 °C
Temperature range storage

Optimal: room temperature (+ 20 °C ± 5 °C)
Max.: 0 °C to  + 70 °C

VariantsUSP Class VI compatibleSafe for food applicationsHydrophobic Teflon coating

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