Gas concentration detection apparatus
US11035821B2 · kind B2 · utility
1Cited by
2References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2015 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Apr 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas concentration detection apparatus is provided with a measuring gas chamber, a solid electrolyte body, a pump cell, a sensor cell, a pump cell controller and a sensor cell detection section. The pump cell controller applies an elimination voltage to the pump cell at a start-up point, before a gas concentration is detected. The water in the measuring gas chamber is decomposed and hydrogen is generated by application of the elimination voltage. Oxygen occluded in a sensor electrode of the sensor cell is removed by the hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.