Patent · US Expired

Test gas leak indicator

US5821404A · kind A · utility

12Cited by

4References

4Claims

0Family size

Assignee

Balzers und Leybold Duetschland Holding AG · DE

Inventors

Thomas Böhm · Zorneding, DE
Ulrich Döbler · Wermelskirchen, DE
Werner Grosse Bley · Bonn, DE

Key dates

Filing date	Sep 6, 1996
Grant date	Oct 13, 1998
Priority date	—
Expiry date	Sep 6, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01M3/202
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a process for operating a test gas leak indicator (1) with a gas inlet (2) and a test gas-sensitive detector (4), in which all or part of a stream of gas containing the test gas reaching the inlet (2) is taken to the detector (4) in the event of a leak; in order to improve the sensitivity of the leakage detection, it is proposed that the stream of gas be preferably periodically modulated and the signal from the test gas detector (4) be processed in synchronism with the modulation of the gas flow.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.