Watch tutorials, webinars and informative videos about PreSens optical sensor systems.
Easy and Fast Oxygen Measurements in Headspace
Needle-Type Oxygen Microsensor with Fixed Sensor Tip NFSG-PSt7
The NFSG-PSt7 is specially designed for headspace measurement in packaging or other applications where gaseous oxygen measurements in small compartments have to be conducted. The sensor tip of this microsensor is fixed inside a steel needle, so it does not protrude the needle tip. Secured this way inside the needle, the sensor can be pierced through material and the oxygen content in smallest headspace volumes can be determined. The NFSG-PSt7 has a measurement range of 0 – 100 % oxygen, with a limit of detection of 0.03 % oxygen.
- High spatial resolution
- High temporal resolution (t90 < 3 sec.)
- No consumption of oxygen
- Signal independent of flow velocity
- Measurement in headspace or smallest volumes
Technical
| Specifications* | Gaseous O2 | |
|---|---|---|
| *data for microsensor TF = flat-broken sensor tip with 230 μm diameter **after two-point calibration as described in the manual | ||
| Measurement range | 0 – 100 % O2 0 – 1000 hPa | |
| Limit of detection | 0.03 % oxygen | |
| Resolution | ± 0.01 % O2 at 1 % O2 | |
| Accuracy at + 20 °C** | ± 0.05 % O2 or ± 3 % rel. | |
| Measurement temperature range | from 0 to + 50 °C | |
| Response time (t90) | < 3 sec. | |
| Properties | ||
| No cross-sensitivity | pH 1 – 14 | |
| Cross-sensitivity | Organic solvents, such as acetone, toluene, chloroform or methylene chloride | |
| Sterilization procedure | 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 | |
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 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?
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