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Sensor Cap for Air Bubble Reduction on OXYPro® MR / MRM
Oxygen Exchange Cap OEC30-PSt8-YAU
A mid-range sensor (type PSt8) is integrated in a beveled steel cap that reduces air bubble formation during dissolved oxygen measurements. This sensor has a maximum measurement range of 0 - 20.9 % oxygen and a detection limit of 0.007 % O2 / 3 ppb. The cap is available in different versions: YOP for bioprocess monitoring, safe for food applications (CAF), or with a hydrophobic Teflon coating (PTFE) for measurements in aggressive environments. It can be screwed to an OXYPro® MR / MRM for easy sensor replacement. The sensor cap stands steam sterilization and cleaning in place.
- Maximum measurement range of 0 - 20.9 % O2
- Reduced air bubble formation
- Different versions: food applications, aggressive environments
- Stands SIP (recommended: + 121 °C, 30 min) & CIP (+ 80 °C, 2 % NaOH)
- Pressure resistant
Technical
| Specifications | OEC30-PSt8-YAU-YOP | OEC30-PSt8-YAU-CAF | OEC30-PSt8-YAU-PTFE |
|---|---|---|---|
| *at 20 °C, 960 - 980 hPa; humidified gas mixture ** after customized calibration ***determined changing from 10 % oxygen gas to nitrogen 5.0 ****determined changing from air-saturated water to a freshly prepared 1 % sodium sulfite solution | |||
| Measurement range* | Optimal: 0 - 10 % O2, 0 - 100 hPa, 0 - 4.5 mg/L Max.**: 0 - 20.9 % O2, 0 - 200 hPa, 0 - 9 mg/L | ||
| Limit of detection* | 0.007 % O2, 0.07 hPa, 3 ppb | ||
| Resolution* | 0.007 % O2 ± 0.002 % O2, 0.023 % O2 ± 0.005 % O2, 2.314 % O2 ± 0.007 % O2 3 ppb ± 1 ppb, 10 ppb ± 2 ppb, 1000 ppb ± 3 ppb | ||
| Response time (t90) Gaseous O2*** Dissolved O2**** | < 10 sec. < 30 sec. | < 15 sec. < 40 sec. | < 85 sec. < 100 sec. |
| Properties | |||
| Compatibility | Aqueous solutions | ||
| No cross-sensitivity to | pH 1 - 14, CO2, SO2, ionic species | ||
| Cross-sensitivity to | Chlorine gas Organic solvents such as pure acetone, toluene, chloroform or methylene chloride | ||
| Steam sterilization (recommended: + 121 °C, 30 min) | Yes | Yes | Yes |
| Cleaning in place (CIP) (+ 80 °C, 2 % NaOH) | Yes | Yes | Yes |
| Cleaning procedure | 3 % H2O2, acidic agents (HCl, H2SO4) max. 4 - 5 % Ethanol, methanol, cleaning agents at room temperature | ||
| Calibration | Two-point calibration in oxygen-free environment (e. g. nitrogen 5.0, 1 % sodium sulfite solution) and a second calibration medium between 2 and 4 % oxygen | ||
| Storage stability | 5 years provided the sensor material is stored at room temperature in dry conditions and in the dark | ||
| Pressure resistance* | - 1 bar to + 12 bar | ||
| Temperature range operation | Optimal: 0 °C to + 50 °C Max.: - 10 °C to + 90 °C | ||
| Storage conditions | Optimal: room temperature (+ 20 °C ± 5 °C) Max.: 0 °C to + 70 °C, 80 % rel. humidity | ||
| Variants | - | Safe for food applications | Hydrophobic Teflon coating |
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