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Oxygen Monitoring in Perfusion Systems with Small Volumes
Oxygen Microsensor Integrated in a Metal Flow-Through Cell FTCM-PSt1
A microsensor is integrated in a stainless steel tee with connectors for 1/16” steel tubing. The flow-through cell’s inner volume of 2.1 µL is extraordinarily small. It is suited for all applications where only small volumes are available. The tapered sensor type ensures real-time measurement with its fast response time of t90 < 1 sec. in gas and < 5 sec. in liquids.
- Perfusion monitoring in smallest volumes
- High temporal resolution (< 5 sec.)
- No consumption of oxygen
- Measures in liquids as well as in the gas phase
Technical
| Specifications | Gaseous & Dissolved O2 | Dissolved O2 |
|---|---|---|
| *after two-point calibration as described in the manual **TS: tapered sensor tip with a diameter < 50 μm and no optical isolation ***TF: flat-broken sensor tip with a diameter of 140 μm | ||
| Measurement range | 0 – 50 % O2 0 – 500 hPa | 0 – 22.5 mg/L 0 – 700 µmol/L |
| Limit of detection | 0.05 % oxygen | 20 ppb |
| Resolution | ± 0.01 % O2 at 0.21 % O2 | ± 0.005 mg/L at 0.09 mg/L |
| Accuracy* | ± 0.4 % O2 at 20.9 % O2 ± 0.05 % O2 at 0.2 % O2 | |
| Drift | < 0.1 % O2 within 30 days (sampling interval of 1 min.) | |
| Measurement temperature range | from 0 to + 50 °C | |
| Response time TS** (t90) | < 1 sec. (gas) | < 2 sec. (liquid) |
| Response time TF*** (t90) | < 15 sec. (gas) | < 30 sec. (liquid) |
| Properties | ||
| Compatibility | Aqueous solutions, ethanol, methanol | |
| No cross-sensitivity | pH 1 – 14 | |
| Cross-sensitivity | Organic solvents, such as acetone, toluene, chloroform or methylene chloride Chlorine gas | |
| Sterilization procedure | Ethylene oxide (EtO) | |
| Cleaning procedure | 3 % H2O2 Ethanol Soap solution | |
| Calibration | Two-point calibration with oxygen-free environment (nitrogen, sodium sulfite) and air-saturated environment | |
| Storage stability | 60 months provided the sensor material is stored in the dark at room temperature | |
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FAQs
How do I import data into excel from a text file containing measurement data?
How do I verify whether the oxygen sensor is giving correct readings (performance proof)?
How does an oxygen sensor work?
How does salinity affect the oxygen measurement?
How does temperature affect the oxygen measurement?
The Stern-Volmer-equation
What is the time of delivery?
Which substances can interfere with the optical O2, pH and CO2 measurements?