Watch tutorials, webinars and informative videos about PreSens optical sensor systems.
Easy Exchange of a Used Sensor Coating
Oxygen Exchange Window OEW-PSt3
The Oxygen Exchange Window is integrated in the FTM-PSt3. It is possible to exchange a used sensor coating by simply changing the OEW. Gases or liquids can be pumped through the cell and the oxygen content monitored. The OEW-PSt3 has a measurement range of 0 – 100 % oxygen, with a detection limit of 0.03 % oxygen.
- Easy exchange of a used sensor coating
- Online oxygen measurement in perfusion systems
- No consumption of oxygen
- Signal independent of flow velocity
- Autoclavable, SIP (+ 130 °C, 1.5 atm) & CIP (2 % NaOH, + 80 °C)
- Long-term stability
Process Control in Biotech & Pharma
The OIMs, the oxygen probes for in-line measurement, are designed for harsh conditions like high pressure or oil/water mixtures. 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.
|Specifications||Gaseous & Dissolved O2||Dissolved O2|
|*after two-point calibration as described in the manual|
|Measurement range|| |
0 – 100 % O20 – 1000 hPa
0 – 45 mg/L0 – 1400 µmol/L
|Limit of detection||0.03 % oxygen||15 ppb|
± 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.|
|Compatibility||Aqueous solutions, ethanol, methanol|
pH 1 – 14
|Cross-sensitivity||Organic solvents, such as acetone, toluene, chloroform or methylene chloride|
|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||24 months provided the sensor material is stored in the dark|
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