Multilayered gas sensor and a related gas concentration detecting system
US6580280B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Dec 5, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/407
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An exhaust gas side electrode is provided on one surface of a solid electrolytic substrate. A reference gas side electrode is provided on an opposite surface of the solid electrolytic substrate so as to be exposed to a reference gas stored in a reference gas chamber. Each lead of the electrode is connected to a signal output terminal. This sensor satisfies a relationship B/A<0.5, wherein ‘A’ represents an overall resistance value of an electric path including the solid electrolytic substrate, the electrodes, and their leads in a sensor activated condition, while ‘B’ represents a resistance value of the leads at a room temperature. Some embodiments may be arranged such that at least one of the leads has a low resistance portion located in the vicinity of the electrodes and a high resistance portion located in the vicinity of signal output terminals. For example, at least one lead may have a smaller resistance per unit length near the electrodes as compared to the resistance per unit length at a location far from the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.