Structure of gas sensor
US6222372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Nov 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/407
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas sensor measuring a given component content in a gas is provided which has an outer and an inner metallic cover, a sensing unit, and an insulator. The sensing unit consists of a measuring electrode to be exposed to the gas to be measured and a reference electrode to be exposed to a reference gas in a reference gas chamber. The measuring electrode and the reference electrode are disposed adjacent each other through a solid electrolyte body. The inner metallic cover is installed on an end of a sensor housing. The outer metallic cover is installed on the periphery of the inner metallic cover. The insulator is mounted within the inner metallic cover and has formed therein holes through which sensor signal pickup leads pass. The insulator has an outer wall different in geometry from an inner wall of the inner metallic cover to define a portion of a reference gas passage therebetween which leads to the reference gas chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.