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Robust Probe for Online Oxygen Monitoring
Oxygen Dipping Probe DP-PSt3
The oxygen dipping probe type PSt3 for measurement in normal oxygen range consists of a polymer optical fiber where one end is coated with an oxygen-sensitive foil. The end of the fiber is covered in a high grade steel tube to protect both the sensor material and the fiber. The steel tube has an outer diameter of 4 mm and a length of 10 cm. Other lengths are available on request. Due to the use of a polymer optical fiber this probe is compatible to temperatures up to + 70 °C.
- 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 0.21 % O2 | ± 0.004 mg/L at 0.091 mg/L |
| Accuracy* | ± 0.4 % O2 at 20.9 % O2 ± 0.05 % O2 at 0.2 % O2 | |
| Drift | < 0.03 % O2 within 30 days (sampling interval of 1 min. / at 0% oxygen) | |
| 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 Chlorine gas | |
| Sterilization procedure | Ethylene oxide (EtO) Gamma irradiation | |
| Cleaning procedure | 3 % H2O2 Acidic agents (HCl, H2SO4), max. 4 – 5 % | |
| 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 | |
Related products
Resources
Publications
Subsurface Oxygen Availability Controls Greenhouse Gas Emission From Wetland Ecosystems
CLiB – a novel cardiolipin-binder isolated via data-driven and in vitro screening
Lab-Scale Cultivation of Cupriavidus necator on Explosive Gas Mixtures: Carbon Dioxide Fixation into Polyhydroxybutyrate
Reduction in thermal stress of marine copepods after physiological acclimation
Photosynthesis, Respiration and Growth of Five Benthic Diatom Strains as a Function of Intermixing Processes of Coastal Peatlands with the Baltic Sea
Comparison of remediation strategies for decreasing 'reductive' characters in Shiraz wines
Methanotroph populations and CH4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change
Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water
Determination of Dissolved Oxygen in the Cryosphere: A Comprehensive Laboratory and Field Evaluation of Fiber Optic Sensors
Effects of stretch on work and efficiency of frog (Rana pipiens) muscle
ROS generation in endothelial hypoxia and reoxygenation stimulates kinase signaling and kinase-dependent neutrophil recruitment
Functional Coexpression of the Mitochondrial Alternative Oxidase and Uncoupling Protein Underlies Thermoregulation in the Thermogenic Florets of Skunk Cabbage 1[W][OA]
The impact of cemented layers and hardpans on oxygen diffusivity in mining waste heaps A field study of the Halsbrücke lead-zinc mine tailings (Germany)
Monitoring bridge scour using dissolved oxygen probes
Introducing two sensing schemes for bridge scour monitoring
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 are the response times for the oxygen sensors based on the 2 mm fiber like non-invasive oxygen sensors and oxygen probes?
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