Gas sensor, method of manufacturing the same, and gas sensor system using the gas sensor
US6338783B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4175
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sensor which can detect the concentration of a combustible gas component in a measurement gas with high accuracy even when the oxygen concentration of the measurement gas or the element temperature changes and which has an excellent response in detecting the combustible gas component is disclosed. In a gas sensor 1, the oxygen concentration of a measurement gas is adjusted to a predetermined level within a first processing space 9 through operation of a first oxygen pump element 3. The measurement gas having an adjusted oxygen concentration is then introduced into a second processing space 10, where a combustible gas component is burned through the assistance of electrodes 16 and 17 functioning as oxidation catalyst sections. Constant voltage is applied to a combustible gas component concentration detection element 5. In this state, when the amount of oxygen changes due to the combustion of the combustible gas component, the output current of the combustible gas component concentration detection element 5 changes with change in the amount of oxygen. Therefore, information regarding the combustible gas component concentration of the original measurement gas can be obtained fro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.