Patent · US Active

Sniffing leak detector

US8171773B2 · kind B2 · utility

5Cited by

2References

7Claims

0Family size

Assignee

INFICON AG · LI

Inventors

Daniel Wetzig · Cologne, DE
Norbert Rolff · Horrem, DE

Key dates

Filing date	Sep 10, 2007
Grant date	May 8, 2012
Priority date	—
Expiry date	Oct 19, 2028

Classification

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

Abstract

To achieve a large measurement range from small up to larger leakage rates, a switchover from normal operation to gross operation occurs. In gross operation, the sucked-in gas flow is separated by different throttles, wherein the throttle that leads to the test gas sensor has a low flow rate. This manner of operation prevents a too large quantity of test gas from reaching the sensor surface and contaminating the sensor. In another alternative, in gross operation the test gas flows only across a part of the sensor surface. The other part is flushed.

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