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Steel Probe for Oxygen Monitoring in Normal Oxygen Range
Oxygen Dipping Probe DP-PSt7
The oxygen dipping probe type PSt7 is compatible with the multi-purpose oxygen meters Microx 4 & Microx 4 trace. The fiber end with attached oxygen sensor is covered by a stainless steel fitting so the probe can be put into semi-solid samples as well as in liquids without a problem. The probe has an outer diameter of 3 mm and a standard length of 10 cm, but also other lengths are available on request.
- Excellent long-term stability
- Pressure resistant (max. 5 bar)
- Polarization-free
- No membrane cleaning and replacement necessary
- No electrolyte solution to replenish
- Long shelf life
Applications
Long-term Measurements in Soil
PreSens offers dipping probes for oxygen measurement that does not consume oxygen. Due to their small dimensions they do not disturb the flow and mass-transport and consequently display the in-situ oxygen concentration. As minisensors from PreSens are long-term stable they can be implanted in soil for many years! With this new method the process of soil aeration, which is very critical for plant productivity, can be investigated.
Dr. Heidi Heuberger, Technical University of Munich, Munich, Germany
Environmental Research: Investigation in Soil Filters
Due to the small outer dimension and mechanical robustness the oxygen dipping probe offers the possibility to measure the oxygen content in-situ in columns filled with filter sands during the flow of sewage (see picture on the left). The results show that a lack of oxygen stops the nitrification process.
Technical
| Specifications | Gaseous & Dissolved O2 | Dissolved O2 |
|---|---|---|
| *after two-point calibration as described in the manual | ||
| Measurement range | 0 – 100 % O2 0 – 1000 hPa | 0 – 45 mg/L 0 – 1400 µmol/L |
| Limit of detection | 0.03 % oxygen | 15 ppb |
| Resolution | ± 0.01 % O2 at 1 % O2 | ± 0.005 mg/L at 0.4mg/L ± 0.025 mg/L at 9.06 mg/L |
| Accuracy at + 20 °C* | ± 0.05 % O2 or ± 3 % rel. | |
| Measurement temperature range | from 0 to + 50 °C | |
| Response time (t90) | < 6 sec. | < 40 sec. |
| Properties | ||
| Compatibility | Aqueous solutions, ethanol, methanol | |
| 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 can I prepare the calibration solutions cal0 and cal100 for oxygen sensors?
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?
Manuals
Brochures
Software
PreSens Datamanager version 2.0.0.57 - Windows XP/Vista/7/8
PreSens Oxygen Calculator version 3.1.1 - Windows 7/8/10