Poison resistant combustible gas sensors and method for warning of poisoning
US7041256B2 · kind B2 · utility
15Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2001 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | May 8, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner layer coated on the electric heating element and containing a precious metal catalyst supported on a porous oxide, the precious metal catalyst catalyzing combustion of a combustible gas to be detected by the element, and an outer layer overlaying the first layer, and containing a catalytic compound capable of trapping gases which poison the precious metal catalyst, the catalytic compound being supported on a porous oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.