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Sensor Cap for Air Bubble Reduction on OXYPro® MR / MRM

Oxygen Exchange Cap OEC30-PSt8-YAU

A mid-range sensor (type PSt8) is integrated in a beveled steel cap that reduces air bubble formation during dissolved oxygen measurements. This sensor has a maximum measurement range of 0 - 20.9 % oxygen and a detection limit of 0.007 % O2 / 3 ppb. The cap is available in different versions: YOP for bioprocess monitoring, safe for food applications (CAF), or with a hydrophobic Teflon coating (PTFE) for measurements in aggressive environments. It can be screwed to an OXYPro® MR / MRM for easy sensor replacement. The sensor cap stands steam sterilization and cleaning in place.

  • Maximum measurement range of 0 - 20.9 % O2
  • Reduced air bubble formation
  • Different versions: food applications, aggressive environments
  • Stands SIP (max. + 140 °C, 1.5 atm) & CIP (+ 80 °C, 2 % NaOH)
  • Pressure resistant
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Technical

SpecificationsOEC30-PSt8-YAU-YOP
OEC30-PSt8-YAU-CAF
OEC30-PSt8-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 - 10 % O2, 0 - 100 hPa, 0 - 4.5 mg/L
Max.**: 0 - 20.9 % O2, 0 - 200 hPa, 0 - 9 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****

< 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 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.: - 40 °C to + 90 °C
Temperature range storageOptimal: room temperature (+ 20 °C ± 5  °C)
Max.: 0 °C to + 70 °C
Variants-Safe for food applicationsHydrophobic Teflon coating

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