Catalytic gas-sensitive elements
US4457954A · kind A · utility
23Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1981 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Aug 28, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An element for detecting combustible gases comprises a catalyst material associated with an electrical resistor serving as both a heater and a thermal sensor, the catalyst material being produced by heating a deposit from an aqueous slurry of alumina, of maximum particle size 0.1 micron, containing in solution a compound of a metal of the platinum group. The deposited material may constitute a pellet (6) within which is embedded a coiled part (3) of a wire (1) constituting the resistor. The element then resembles a conventional "pellistor" in form, but has improved resistance to poisoning or inhibition of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.