Capacitance manometer with digital output
US4466289A · kind A · utility
10Cited by
1References
7Claims
0Family size
Inventor
Key dates
| Filing date | Mar 17, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Mar 17, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive pressure or vacuum gauge is disclosed that utilizes a transducer in which a change in capacitance between a movable conductive diaphragm and the wall of the transducer is used to sense changes in pressure or vacuum. The change in capacity is converted directly into a change in frequency of a digital signal by means of a simple resistance/capacitance oscillator in which the capacitive transducer is used as the capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.