Electrochemical gas sensor
US4639306A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Sep 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for the detection and measurement of an object gas is disclosed. Such an apparatus comprises a sensing electrode having a catalytic surface, a counter electrode having a catalytic surface, an electrolyte in electrical contact with the sensing electrode and the counter electrode, a reference electrode in contact with the electrolyte and the sensing electrode, a means for supplying an electrical potential between the sensing electrode and the reference electrode and a means for measuring the current flow resulting from the reaction of the object gas with the sensing electrode by way of the sensing electrode substrate to the counter electrode substrate. The substrate, which supports the catalytic sensing electrode and counter electrode materials being electrically conductive carbon or graphite, which allows the electrons generated at the sensing electrode catalytic surface to be removed through the substrate instead of from the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.