Hydrocarbon concentration sensor for use in engine exhaust gas
US4033169A · kind A · utility
26Cited by
9References
8Claims
0Family size
Assignees
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Key dates
| Filing date | Aug 7, 1975 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Aug 7, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor having an n-type oxide semiconductor layer and a p-type oxide semiconductor layer spaced from and electrically connected in series with each other and two fixed resistors connected in series with each other, wherein the two semiconductor layers and two resistors are connected to construct a four-arm bridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.