Sensor element
US11567033B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2019 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Nov 17, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/41
- 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 an inlet at one end portion thereof; at least one internal chamber located inside the ceramic body, and communicating with the gas inlet; and an electrochemical pump cell including an outer electrode, an inner electrode facing the chamber, and a solid electrolyte therebetween, and a porous leading-end protective layer covering a leading end surface and four side surfaces in a predetermined range of the element base on the one end portion, wherein the protective layer has an extension extending into the gas inlet and fixed to an inner wall surface of the ceramic body demarcating the gas inlet, and a gap communicating with the gas inlet is located in the protective layer, with demarcated by a portion of the protective layer continuous with the extension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.