Gas detection method and gas detection apparatus
US7493795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2005 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0011
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a gas detection method and detection apparatus that provide better sensitivity and faster recovery after response than conventional gas detection methods and apparatus, by improving on these conventional methods and apparatus. The present invention is a gas detection method, in which the target gas is detected while oxygen is supplied to a sensor element 11a of a metal oxide-type gas sensor 11, wherein the target gas is detected while water vapor is supplied to the sensor element 11a, and is also a gas detection apparatus equipped with an oxygen supply means 14 for supplying oxygen to a sensor element 11a of a metal oxide-type gas sensor 11, said gas detection apparatus being provided with a water vapor supply means 15 for supplying water vapor to the sensor element 11a.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.