Watch tutorials, webinars and informative videos about PreSens optical sensor systems.
Steel Probe for Monitoring Oxygen Traces in Processes
Oxygen Probe for In-Line Measurement OIM-PSt6
The OIM-PSt6 has a stainless steel fitting with standardized length and thread, so it is compatible with most bioreactors and port adapters. The optical trace oxygen sensor has a measurement range of 0 - 5 % oxygen and a detection limit of 1 ppb. It is integrated in an Optical Exchange Window, which is screwed to the top of the metal fitting and can be replaced if needed. The probe has excellent long-term stability and can be equipped with a customized fitting for e. g. sight glasses.
- Stands autoclaving, SIP (+ 130 °C, 1.5 atm) & CIP (2 % NaOH, + 80 °C)
- Polarization-free
- No membrane cleaning and replacement necessary
- No electrolyte solutions to replenish
- Pressure resistant
- Measurement in steel fermenters
- Trace oxygen measurements in brewing and beverage industries
Applications
Process Control in Biotech & Pharma
The OIMs, the oxygen probes for in-line measurement, are designed for harsh measurement conditions. These systems give high accuracy and are almost maintenance-free as they do not contain any membranes and electrolytes. The sensors are fully autoclavable and sterilizable (CIP & SIP).
In-line Oxygen Measurement in Brewing and Beverage Industry
Even low concentrations of oxygen influence shelf-life and the taste of certain beverages. Due to the extraordinary low detection limit and outstanding accuracy of PreSens trace oxygen sensors, the quality of oxygen-sensitive products such as beer, wine and soft drinks is secured.
The optical sensors have – compared to standard electrodes – a very fast response time and they are very easy to maintain.
Technical
| Specifications | Gaseous & Dissolved O2 | Dissolved O2 |
|---|---|---|
| *after two-point calibration as described in the manual | ||
| Measurement range | 0 – 5 % O2 0 – 41.4 hPa | 0 – 2 mg/L 0 – 56.9 µmol/L |
| Limit of detection | 0.002 % oxygen | 1 ppb |
| Resolution | ± 0.0007 % O2 at 0.002 % O2 | ± 0.0003 mg/L at 0.001 mg/L |
| Accuracy* | ± 1 ppb or ± 3 % of the respective concentration; whichever is higher | |
| Drift at 0 % oxygen | < 2 ppb within 30 days (sampling interval of 1 min.) | |
| Measurement temperature range | from 0 °C 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 | Steam sterilization | |
| Cleaning procedure | Cleaning in place (CIP, 2 % NaOH, + 80 °C, + 176 °F) | |
| Calibration | Two-point calibration with oxygen-free environment (nitrogen, sodium sulfite) and a second calibration value optimally between 1 % and 2 % oxygen | |
| Storage stability | 60 months provided the sensor material is stored in the dark | |
Related products
Resources
FAQs
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