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Wide Range Oxygen Measurements with Metal Flow-Through Cells

Oxygen Exchange Cap OEC-M10-PSt3

This Oxygen Exchange Cap carries a PSt3 oxygen sensor with a maximum measurement range of 0 - 100 % O2 and a limit of detection of 0.03 % O2. With its M10 thread, it can be screwed into a metal flow-through cell FTM-M10. This way a used sensor coating in your flow-through cell can easily be replaced. A polymer optical fiber with protective metal spiral tube cover can be attached magnetically to this OEC. The oxygen sensor is very robust and stands CIP (Cleaning in place, + 80 °C and 2 % NaOH) or even steam sterilization (+ 130 °C, 1.5 atm).

  • Replacement sensor for FTM-M10
  • Measure oxygen in pipes
  • Max. measurement range 0 - 100 % O2, limit of detection 0.03 % O2
  • Signal independent of flow velocity
  • Autoclavable, SIP (+ 130 °C, 1.5 atm) & CIP (+ 80 °C, 2 % NaOH)
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Applications

In-line Oxygen Measurement in Brewing and Beverage Industry

Even low concentrations of oxygen influence shelf-life and the taste of certain beverages. Due to the extraordinary low detection limit and outstanding accuracy of PreSens trace oxygen sensors, the quality of oxygen-sensitive products such as beer, wine and soft drinks is secured.
The optical sensors have – compared to standard electrodes – a very fast response time and they are very easy to maintain.


Technical

Specifications Gaseous & Dissolved O2 Dissolved O2
*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
Max.**: 0 - 100 % O2, 0 - 1000 hPa
Optimal: 0 - 22.5 mg/L
Max.**: 0 - 45.0 mg/L
Limit of detection* 0.03 % O2 0.020 mg/L
Resolution* 1 % O2 ± 0.02 % O2
20.9 % O2 ± 0.1 % O2
50 % O2 ± 0.4 % O2
0.4 mg/L ± 0.009 mg/L
9 mg/L ± 0.04 mg/L
Response time (t90) < 10 sec.*** < 30 sec.****
Properties
Compatibility Aqueous solutions, ethanol, methanol
No cross-sensitivity pH 1 - 14, CO2, H2S, SO2, ionic species
Cross-sensitivity Organic solvents such as pure acetone, toluene, chloroform or methylene chloride
Chlorine gas
Sterilization procedure Steam sterilization
Ethylene oxide (EtO)
Gamma irradiation
Cleaning procedure Cleaning in place (CIP, 2 % NaOH, + 80 °C, + 176 °F)
3 % H2O2
Acidic agents (HCl, H2SO4), max. 4 % - 5 %
Calibration Two-point calibration with oxygen-free environment (nitrogen, sodium sulfite) and air-saturated environment
Temperature range operation Optimal: 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
Storage stability 5 years provided the sensor material is stored at room temperature in dry conditions and in the dark

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