We can offer you a suitable measuring cell in connection with a suitable sensor element as well as our AQUATRACE® trace moisture analyzers for almost every requirement:
- Pt-wire on glass (classic design)
- Pt-wire on ceramic
- Pt-Interdigital structure on ceramic
- different substrates, depending on the requirements of the chem. Resistance (e.g. for gases with a high fluorine content)
- close cooperation with Fraunhofer IKTS in Dresden
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measuring cell SS - Sensor with Pt-Interdigital structure |
measuring cell SS - Sensor with Pt-Winding on glass | measuring cell PVDF - Sensor with Pt-Winding on glass | measuring cell PVDF - Sensor with Pt-Winding on ceramic |
The measuring cells have been specially developed for our AQUATRACE® traces moisture analyzers.
variant of measuring cells
| AQUATRACE® measuring cell for measuring traces of moisture analyzers | |
| for gas flow 20 or 100 Nl / h |
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| (1) Version in stainless steel, sensor glass | ATM.BS.G 20/100 |
| (2) Version in stainless steel, ceramic sensor | ATM.BS.K 20/100 |
| (3) Version in PVDF, sensor glass | ATM.BP.G 20/100 |
| (4) Version in PVDF, sensor ceramic | ATM.BP.K 20/100 |
| (5) Version in stainless steel, sensor Pt-interdigital structure | ATM.BS.KoPt 20/100 (especially for HF-containing gases) |
| (6) Version in PVDF, Pt Pt interdigital structure sensor | ATM.BP.KoPt 20/100 (especially for HF-containing gases) |
| (7) Measuring cell for use in hazardous areas | like (1) - (6) + ZB |
| (8) Customer special version possible | ATM.BX.X 20/100 |
Coulometric moisture sensor - The P2O5 measuring principle
Phosphorus pentoxide (P2O5) has a great desire to absorb water in order to change into tetrametaphosphoric acid. It is an extremely hygroscopic salt. This makes it ideal for setting up a moisture-sensitive sensor. The process goes back to the KEIDEL measuring cell developed in 1956. In contrast to this, the sensitive layer of our AQUATRACE® sensor is applied on the outside, together with two electrodes. At these a decomposition voltage is present greater than 12V. This converts the metaphosphoric acid into hydrogen and oxygen and thus releases phosphorus pentoxide again. Theoretically, the P2O5 is not used up. The measuring of the resulting electrolysis current is a directly value of the moisture (Farady's law).