Patent · US Active

Test device for performing leak detection at a plurality of test sites

US8881576B2 · kind B2 · utility

8Cited by

12References

4Claims

0Family size

Assignee

INFICON AG · LI

Inventors

Vladimir Schwartz · Horlivka, UA
Boris Chernobrod · Rehovot, IL

Key dates

Filing date	Apr 9, 2010
Grant date	Nov 11, 2014
Priority date	—
Expiry date	Mar 24, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01M3/38
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The leak detection device comprises a plurality of measuring cells (10) in whose interior the absorption of a laser beam (17) is influenced by the presence of tracer gas. All of said measuring cells (10) are connected to a host unit (25) via light-conducting fibers (28,34). In the host unit (25), a laser (26) designed for modulation and a photodetector (37) are arranged. Modulation of the laser radiation is preferably performed by two-tone frequency modulation. This has the effect that the fiber length cannot significantly skew the result of the measurement.

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