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Oxygen Measurements in Packaging Headspace
Needle-Type Oxygen Microsensor with Fixed Sensor Tip NFSG-PSt1
The tiny sensor tip of this oxygen microsensor is fixed inside a steel needle, so it does not protrude the needle tip. It is specially designed for packaging applications and measurements in the headspace. Fixed inside the needle the sensor can be pierced through the packaging material and the oxygen content in the headspace can be determined within seconds. The NFSG-PSt1 has a measurement range of 0 – 50 % oxygen, with a limit of detection of 0.05 % oxygen.
- High spatial resolution
- High temporal resolution (t90 < 3 sec.)
- No consumption of oxygen
- Measurement in headspace or smallest volumes
| *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
0 – 50 % O2
|Limit of detection||0.05 % oxygen|
± 0.01 % O2 at 0.21 % O2
|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.|
|Response time TF*** (t90)||< 15 sec.|
pH 1 – 14
|Cross-sensitivity||Organic solvents, such as acetone, toluene, chloroform or methylene chloride|
Ethylene oxide (EtO)
|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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