Gas measurement method
US4399684A · kind A · utility
35Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Nov 27, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/124
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas measurement method for metal-oxide gas sensors. The sensors are thermally cycled by sequential heating and cooling. It has been found that a continuous, concentration-dependent, unique signature for different gases is produced during thermal cycling. Once signature patterns are developed for different concentrations, an unknown gas concentration for which a signature pattern exists may be sampled, either by amplitude or time-dependent samples, in order to identify the gas in its concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.