Fluid leakage detecting apparatus
US4529974A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1982 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Jul 8, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting leakage of fluid comprises a bridge circuit composed of a heat generating resistance element connected in one arm and installed at a location where leakage of fluid may possibly occur and other resistor elements inserted in other arms, respectively, an input power supply source connected to the input of the bridge circuit and a differential amplifier connected to the output of the bridge circuit for amplifying an unbalance voltage produced by the bridge circuit, wherein the resistor elements inserted in the other arms of the bridge circuit are so dimensioned that the heat generating resistance element is maintained in a heat generating state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.