Solid state sensor
US4171341A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1977 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Oct 12, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for selectively sensing the presence of a given constituent within an atmosphere. The apparatus includes a solid state element containing alkali metal ions that react with ions of the given constituent when the two are brought together. The solid state element is housed within a shield that functions as an ion control screen when heated to a predetermined temperature in the presence of a gas or vapor of the given constituent to selectively pass ions of the given constituent into reactive contact with the solid state element housed therein. Circuit means are further provided for detecting a flow of ions through the shield and for producing a discernible signal in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.