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High Resolution Profiling of Oxygen Traces
Profiling Oxygen Microsensor PM-PSt8
The PM-PSt8 is specifically designed for profiling applications. It is the most robust microsensor version PreSens offers – with a firmer fiber construction and a splash-proof metal housing. Therefore, it is ideally suited for profiling applications or whenever minimal invasive trace oxygen measurements need to be performed in semi-solid samples, like e. g. sediments, microbial mats or biofilms. The PM-PSt8 is compatible with the Microx 4 trace and OXY-1 ST trace oxygen meters. It has a measurement range of 0 % – 10 % oxygen, with a detection limit of 0.007 % oxygen.
- High spatial resolution (< 50 μm)
- High temporal resolution (t90 < 3 sec.)
- Penetration probe for insertion into semi-solids
- Mechanical interlock for precise vertical localization inside the sample
- Splash-proof metal housing
- No electrical interference due to optical measurements
Applications
Microprofiling in Biological & Environmental Research
The different types of oxygen and pH microsensors allow e. g. measurements in smallest sample volumes or inside tissue. The micromanipulators should be applied whenever it is necessary to insert the microsensor safely into semi-solid samples and when exact localization and stabilization of the microsensor tip within the sample is required. Using the safe-insert function the microsensor tip can be securely inserted and localized at the exact position where you want to conduct your measurements.
Microsensor Measurements in Medical & Life Science Research
PreSens microsensors are ideal tools for medical and life science research, as they allow for precise on the spot measurement and microprofiling inside tissue constructs. The Manual Micromanipulator is the indispensable equipment in these applications for exact localization of the microsensor inside the sample and microprofiling in step sizes down to 10 μm. PreSens needle-type microsensors are used in many tissue engineering applications.
Microprofiling of Sediments & Biofilms
Together with the specially designed PreSens Profiling Microsensors (PM) the Automated Micromanipulator is the ideal tool for oxygen measurements in sediment and biofilm applications. With a free choice of step zones, travel velocities and wait times different layers inside the sample can be monitored and assessed in step sizes down to 10 μm. The software visualizes the online measurements, so you can follow gradients and identify boundaries immediately while the sensor is automatically moved inside the sample.
Technical
| Specifications* | Gaseous & Dissolved O2 | Dissolved O2 |
|---|---|---|
| *data for microsensors TF = flat-broken sensor tip with 230 μm diameter **after two-point calibration as described in the manual | ||
| Measurement range | 0 – 10 % O2 0 – 100 hPa | 0 – 4.5 mg/L 0 – 140 µmol/L |
| Limit of detection | 0.007 % oxygen | 3 ppb |
| Resolution | ± 0.002 % O2 at 0.008 % O2 | ± 0.7 ppb at 3 ppb |
| Accuracy at + 20 °C** | ± 3 ppb or ± 3 % rel. | |
| Measurement temperature range | from 0 to + 50 °C | |
| Response time (t90) | < 3 sec. (gas) | < 10 sec. (liquid) |
| 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 a second calibration value optimally between 2 % and 4 % oxygen | |
| Storage stability | 60 months provided the sensor material is stored in the dark at room temperature | |
Related products
Resources
FAQs
Can I change the cannula on my Profiling Microsensor?
Can I measure inside a tissue with fiber optic microsensors?
Can the Profiling Microsensor be submerged in water?
Can the Profiling Microsensor be used with the Microx TX3 (trace)?
How do I import data into excel from a text file containing measurement data?
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?
The needle tip of the microsensor is vibrating or not moving smoothly when I try to insert it in the sample with the Manual Micromanipulator. What can I do?
The Stern-Volmer-equation
What cannula / steel needle sizes are available for Profiling Microsensors?
What is the correct way for handling an oxygen or pH microsensor?
What is the difference between tapered and flat-broken microsensor tips?
What is the smallest tip size available for Profiling Microsensors?
What is the time of delivery?
Which substances can interfere with the optical O2, pH and CO2 measurements?
Manuals
Brochures
Software
PreSens Profiling Studio version 1.1.0 - Windows 7/8/10
PreSens Oxygen Calculator version 3.1.1 - Windows 7/8/10