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Reduces Air Bubble Formation during Dissolved Oxygen Measurements

Oxygen Exchange Cap OEC30-PSt7-YAU

This beveled sensor cap with integrated PSt7 sensor is specifically designed to reduce air bubble formation during dissolved oxygen measurements with the OXYPro® WR / WRM. The PSt7 sensor has a maximum measurement range of 0 - 100 % O2, and a detection limit of 0.03 % O2 / 20 ppb. The sensor cap 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. It stands steam sterilization and cleaning in place.

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

Specifications
OEC30-PSt7-YAU-YOP
OEC30-PSt7-YAU-CAF
OEC30-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 resistance*10 mbar up to 12 bar
Temperature range operationOptimal: 0 °C to + 50 °C
Max.: - 40 °C to + 90 °C
Temperature range storageOptimal: 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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