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Bare Fiber Oxygen Microsensor with a Tip Size Thinner than a Hair
Implantable Oxygen Microsensor IMP-PSt1
This miniaturized optical oxygen microsensor is designed for various customized applications. The tiny probe has a tip size < 50 µm to 140 µm while the outer diameter ranges from 140 µm to 900 µm. The microsensor tip is not mounted into any additional housing. The bare glass fiber tip can be mounted to your own housings, steel tubes and micro respirometer chambers etc. The small outer diameter even allows insertion into implantable Venflon-tubes. Moreover, the microsensor can be deployed in sealed containers to measure the oxygen content directly. The IMP-PSt1 has a measurement range of 0 – 50 % oxygen, with a limit of detection of 0.05 % O2.
- High spatial resolution (< 50 μm)
- High temporal resolution (t90 < 3 sec.)
- Integration into customized housings and set-ups
- No consumption of oxygen
- Measurement in headspace & liquids
|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 % O20 – 500 hPa
0 – 22.5 mg/L0 – 700 µmol/L
|Limit of detection||0.05 % oxygen||20 ppb|
± 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)|
|Compatibility||Aqueous solutions, ethanol, methanol|
pH 1 – 14
|Cross-sensitivity||Organic solvents, such as acetone, toluene, chloroform or methylene chloride|
|Cleaning procedure||3 % H2O2|
|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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