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Trace Oxygen Measurement in Pipes
Oxygen Sensor Integrated in Metal Flow-Through Cell FTM-M10-PSt6
In this metal flow-through cell an Oxygen Exchange Cap (OEC-M10) with PSt6 sensor (max. measurement range 0 - 10 % O2, limit of detection 0.5 ppb) is integrated via M10 thread. The FTMs are available in different sizes with 6 mm, 1/4" and 1/2" connector diameter, but they can be installed in pipes with other diameters using the respective adapters. For sensor read-out an optical fiber is connected. Fibers with protective metal spiral tube cover can be attached to the FTMs magnetically. The oxygen probe is very robust and long-term stable. It can be cleaned by CIP (Cleaning in place, + 80 °C and 2 % NaOH) and also stand steam sterilization (+ 130 °C, 1.5 atm). The OEC-M10 can easily be exchanged if necessary.
- Max. measurement range 0 - 10 % O2, limit of detection 0.5 ppb
- Different FTM sizes available
- No consumption of oxygen
- Signal independent of flow velocity
- Autoclavable, SIP (+ 130 °C, 1.5 atm) & CIP (+ 80 °C, 2 % NaOH)
Applications
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 | |||||
|---|---|---|---|---|---|---|---|
| *at 20 °C, 960 - 980 hPa; humidified gas mixture **after customized calibration ***determined changing from 20.9 % oxygen gas to nitrogen 5.0 ****determined changing from air-saturated water to a freshly prepared 1 % sodium sulfite solution | |||||||
| Measurement range* | Optimal: 0 - 5 % O2, 0 - 50 hPa Max.**: 0 - 10 % O2, 0 - 100 hPa | Optimal: 0 - 2.0 mg/L Max.**: 0 - 4.5 mg/L | |||||
| Limit of detection* | 0.001 % O2 | 0.5 ppb | |||||
| Resolution* | 0.002 % O2 ± 0.0006 % O2 0.046 % O2 ± 0.0008 % O2 0.2 % O2 ± 0.001 % O2 | 1 ppb ± 0.3 ppb 20 ppb ± 0.4 ppb 100 ppb ± 0.5 ppb | |||||
| Response time (t90) | < 10 sec.*** | < 30 sec.**** | |||||
| Properties | |||||||
| Compatibility | Aqueous solutions, ethanol, methanol | ||||||
| No cross-sensitivity | pH 1 - 14, CO2, H2S, SO2, ionic species | ||||||
| Cross-sensitivity | Organic solvents such as pure acetone, toluene, chloroform or methylene chloride Chlorine gas | ||||||
| Sterilization procedure | Steam sterilization Ethylene oxide (EtO) Gamma irradiation | ||||||
| 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 a second calibration value optimally between 1 % and 2 % oxygen | ||||||
| Storage stability | 5 years provided the sensor material is stored at room temperature in dry conditions and in the dark | ||||||
| Pressure resistance | 10 mbar up to 20 bar | ||||||
| Temperature range operation | Optimal: 0 °C to + 50 °C Max.: - 40 °C to + 90 °C | ||||||
| Temperature range storage | Optimal: room temperature (+ 20 °C ± 5 °C) Max.: 0 °C to + 70 °C | ||||||
| FTM-M10 formats | Connector diameter | 6 mm | 1/4" | 1/2" | |||
| Inner diameter | 4.7 mm | 4.8 mm | 10.4 mm | ||||
| Inner volume | 1.1 cm3 | 1.2 cm3 | 5.0 cm3 | ||||
| Material | Stainless steel 316L (body), 304 (OEC-M10) | ||||||
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