Oxygen sensor
US4498968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1983 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Aug 23, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/417
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosed oxygen sensor has a plate-like oxygen pump element with electrodes, a plate-like oxygen concentration cell element with electrodes, a means to couple the two elements in parallel to each other while forming a gap between those electrodes of the two elements which face with each other, and an oxygen diffusion resistive layer deposited on that electrode of the pump element which faces said gap, whereby said pump element pumps out oxygen from said gap so as to produce such an oxygen partial pressure in the gap under the presence of said oxygen diffusion resistive layer that the oxygen concentration of a gas surrounding the oxygen sensor is detected by coaction of said two elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.