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Wide range oxygen monitoring in pipes

Metal Flow-Through Cell with Integrated O2 Sensor FTM2-PSt3

In this metal flow-through cell and oxygen sensor stick with PSt3 sensor (max. measurement range 0 - 100 % O2, limit of detection 0.03 % O2) is integrated. The FTM2 has a connector diameter of 1/4" but it can also be installed in pipes with other diameters using the respective adapters. For sensor read-out, an optical fiber is screwed to the sensor stick via SMA connector. The oxygen probes are very robust and long-term stable. The FTM2-PSt3 can be cleaned by CIP (Cleaning in place, + 80 °C and 2 % NaOH) and stand steam sterilization (+ 130 °C, 1.5 atm). The sensor stick can easily be exchanged if necessary.

  • Max. measurement range of 0 -  100 % O2, limit of detection 0.03 % O2
  • No consumption of oxygen
  • Signal independent of flow velocity
  • Autoclavable, SIP (+ 130 °C, 1.5 atm) & CIP (+ 80 °C, 2 % NaOH)

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 % O20.020 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
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 air-saturated environment
Storage stability5 years provided the sensor material is stored at room temperature in dry conditions and in the dark
Pressure resistance10 mbar up to 20 bar (up to 100 bar on special request)
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
FTM2 format

Connector diameter: 1/4"
Inner diameter: 4.8 mm
Inner volume: 1.0 cm3
Material: stainless steel 316 (body), 316L (sensor stick)

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