Leak detection device using hydrogen as tracer gas
US9176021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2011 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Aug 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The leak detection device using hydrogen as a tracer gas is intended to be connected to an object to be tested. The leak detection device includes a hydrogen sensor placed in a low-pressure enclosure and includes a diode, a resistor, a MOS-type transistor whose gate is covered with a palladium catalyst, a pump connected to the low-pressure enclosure, a pressure gauge configured to measure the pressure in a vacuum line formed by the low-pressure enclosure connected to the pump, and a multiway valve having a first port allowing admission of the gas flow containing the tracer gas into the vacuum line, and a second port allowing the admission of neutral gas. The method makes it possible to stabilize the pressure of the vacuum line in order to avoid fluctuations in the hydrogen measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.