Sensor element
US11385199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2019 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/2252
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor element includes: an element base including: a ceramic body made of an oxygen-ion conductive solid electrolyte, and having a gas inlet at one end portion thereof; at least one internal chamber located inside the ceramic body, and communicating with the gas inlet under predetermined diffusion resistance; an electrochemical pump cell including an electrode located on an outer surface of the ceramic body, an electrode facing the internal chamber, and a solid electrolyte located therebetween; and a heater buried in the ceramic body, and a leading-end protective layer being porous, and covering a leading end surface and four side surfaces in a predetermined range of the element base on the one end portion. The leading-end protective layer has an extension extending into a widened portion included in the gas inlet, and fixed to an inner wall surface of the widened portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.