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Robust Oxygen Probe for Process Control
Oxygen Probe for In-Line Measurement OIM-PSt3
The oxygen probe for in-line measurement (OIM) consists of a fitting made of stainless steel with an optical exchange cap (OEC) in which the oxygen sensor is integrated. The OEC is screwed to the top of the metal fitting, and can be exchanged. The OIM is connected to the oxygen meter via an optical fiber, has a standardized thread and length and is compatible with most bioreactors and port adapters. In addition, customized fittings for e. g. sight glasses are offered.
- 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
- Oxygen measurements in biotech & pharma
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 – 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 at 0% oxygen | < 0.03 % O2 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 Ethylene oxide (EtO) | |
| Cleaning procedure | Cleaning in place (CIP, 2 % NaOH, + 80 °C, + 176 °F) 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
FAQs
How can I prepare the calibration solutions cal0 and cal100 for oxygen sensors?
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?
How many autoclaving cycles can an optical oxygen sensor go through without affecting the sensor performance?
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