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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
Technical
| Specifications | Gaseous 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 | |
| Limit of detection | 0.05 % oxygen | |
| Resolution | ± 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. | |
| Properties | ||
| 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 | |
Related products
Resources
FAQs
How do I import data into excel from a text file containing measurement data?
How do I measure the oxygen content in small headspace packages with a needle-type oxygen microsensor?
How does an oxygen sensor work?
How does salinity affect the oxygen measurement?
How does temperature affect the oxygen measurement?
I can see that about 1 mm of the tapered sensor tip of an oxygen microsensor is coated with material. Is all of this coating sensitive to oxygen and where exactly do I measure?
Is there a recoating service for the needle-type microsensors?
The Stern-Volmer-equation
What is the time of delivery?
Which substances can interfere with the optical O2, pH and CO2 measurements?
Manuals
Brochures
Software
PreSens Oxygen Calculator version 3.1.1 - Windows 7/8/10