FTCM-PSt8 Oxygen Microsensor Integrated in Metal Flow-Through Cell

Trace Oxygen Monitoring in Smallest Volumes

Oxygen Microsensor Integrated in Metal Flow-Through Cell FTCM-PSt8

A stainless steel tee is equipped with an oxygen microsensor. The FTCM-PSt8 has connectors for 1/16” steel tubing, and an inner volume of only 2.1 µL. It is suited for all applications where only small volumes are available. With a tapered microsensor tip and its extraordinarily fast response time t90 < 3 sec. oxygen monitoring in real time can be performed. The PSt8 type sensor has a measurement range of 0 – 10 % oxygen, with a detection limit of 0.007 % oxygen.

  • Perfusion monitoring in smallest volumes
  • High temporal resolution (t90 < 3 s)
  • No consumption of oxygen
  • Signal independent of flow velocity
  • Measures in liquids as well as in the gas phase
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SpecificationsGaseous & Dissolved O2Dissolved O2
*after two-point calibration as described in the manual
Measurement range0 – 10 % O2
0 – 100 hPa

0 – 4.5 mg/L

0 – 140 µmol/L
Limit of detection0.007 % oxygen3 ppb

± 0.002 % O2 at 0.008 % O2
± 0.06 % O2 at 2.5 % O2

± 0.7 ppb at 3 ppb
± 2.5 ppb at 1000 ppb

Accuracy at + 20 °C*± 3 ppb or ± 3 % rel.
Measurement temperature rangefrom 0 to + 50 °C
Response time (t90)< 3 sec. (gas)< 10 sec. (liquid)
CompatibilityAqueous solutions, ethanol, methanol
No cross-sensitivity

pH 1 – 14
CO2, H2S, SO2
Ionic species


Organic solvents, such as acetone, toluene, chloroform or methylene chloride
Chlorine gas

Sterilization procedureEthylene oxide (EtO), recalibration recommended
Cleaning procedure

3 % H2O2
Soap solution

CalibrationTwo-point calibration with oxygen-free environment (nitrogen, sodium sulfite) and a second calibration value optimally between 2 % and 4 % oxygen
Storage stability60 months provided the sensor material is stored in the dark at room temperature

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