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Measurement of oxygen traces with metal flow-through cells

Oxygen Exchange Cap OEC-M10-PSt6

This oxygen exchange cap with PSt6 oxygen sensor (max. measurement range 0 - 10 % O2, limit of detection 0.5 ppb) can be screwed into a metal flow-through cell FTM-M10 via its M10 thread. 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 the 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 traces in pipes
  • Max. measurement range 0 - 10 % O2, limit of detection 0.5 ppb
  • 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

SpecificationsGaseous & Dissolved O2Dissolved 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 - 5 % O2, 0 - 50 hPa
Max.**: 0 - 10 % O2, 0 - 100 hPa
Optimal: 0 - 2.0 mg/L
Max.**: 0 - 4.5 mg/L
Limit of detection*0.001 % O20.5 ppb
Resolution*0.002 % O2 ± 0.0006 % O2
0.046 % O2 ± 0.0008 % O2
0.2 % O2 ± 0.001 % O2
1 ppb ± 0.3 ppb
20 ppb ± 0.4 ppb
100 ppb ± 0.5 ppb
Response time (t90)< 10 sec.***< 30 sec.****
Properties
CompatibilityAqueous solutions, ethanol, methanol
No cross-sensitivitypH 1 - 14, CO2, H2S, SO2, ionic species
Cross-sensitivityOrganic solvents such as pure acetone, toluene, chloroform or methylene chloride
Chlorine gas
Sterilization procedureSteam sterilization
Ethylene oxide (EtO)
Gamma irradiation
Cleaning procedureCleaning in place (CIP, 2 % NaOH, + 80 °C, + 176 °F)
3 % H2O2
Acidic agents (HCl, H2SO4), max. 4 % - 5 %
CalibrationTwo-point calibration with oxygen-free environment (nitrogen, sodium sulfite) and a second calibration value optimally between 1 % and 2 % oxygen
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
Storage stability5 years provided the sensor material is stored at room temperature in dry conditions and in the dark

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