Electrochemical measuring electrode device for simultaneously measuring the partial pressures of two gasses
US4836907A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Nov 25, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/404
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrochemical electrode device for simultaneously measuring the partial pressures of two gasses in a medium of limited gas availability one of which is measured potentiometrically and another one of which is measured polarographically comprises an electrode body (18) constituting a reference electrode relative to a pH-electrode (19) of a potentiometric electrode system, and a anode relative to a cathode (20) of a polarographic electrode system. Furthermore, the electrode device comprises an electrolyte solution (28) enclosed between the electrode body and a membrane (30). The membrane comprises a basic membrane layer (31), preferably of polytetrafluoroethylene (PTFE) or fluoroethylenepropylene (FEP) of a thickness of about 12 .mu.m, and a covering (32), preferably a polypropylene layer of a thickness of about 15 .mu.m, which covers part of the basic membrane layer so that an uncovered area (34) is constituted in front of the pH-electrode. The uncovered area constitutes a first membrane part showing high permeability to the first gas and constitutes together with the potentiometric electrode system and the electrolyte solution a first measuring system for measuring the partial …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.