Device for measuring gas concentration having dual emitter
US7034325B2 · kind B2 · utility
4Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Aug 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring the concentration of a gas contained in a cavity and for checking the operation of a catalytic element in an exhaust line in an automobile vehicle. A first emitter (E1) composed of an optical pumped micro-cavity and for which the emission spectrum is within the gas absorption band emits a first radiation that passes through the cavity. A second emitter emits a second radiation that passes through the cavity. A receptor measures the optical intensity (I) of the radiation that passed through the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.