Gas detecting device
US4958513A · kind A · utility
9Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0067
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
When the output of a gas sensor is approximately constant, the sensor output is stored as a reference output. Evolution of a gas is detected from variations in the sensor output from the stored reference output. The sensor output which is constant is detected by establishing that the difference between a maximum and a minimum of sensor output in a predetermined section is not greater than a specified value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.