Leak indicator comprising a sniffer probe

US7779675B2 · kind B2 · utility

Assignee

• INFICON AG · LI

Inventors

• Daniel Wetzig · Cologne, DE
• Stefan Mebus · Cologne, DE

Key dates

• Filing date: Feb 2, 2006
• Grant date: Aug 24, 2010
• Expiry date: Nov 11, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M3/205
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The leak detector includes a basic device which includes a vacuum pump, a test gas sensor, and a hand-held sniffing probe. The sniffing probe is connected with the basic device via a flexible hose line which includes capillary tubes. At least two capillary tubes are provided, which are adapted to be opened via valves. Thus different capillary cross sections can be rendered operative. The dead time between the entry of the test gas into the sniffing probe and the detection by the test gas sensor can be changed and/or selected. Thus, even the smallest detectable leak rate can be changed and/or selected. The leak detector can be adapted to different requirements by the user without the need for exchanging the hose line. Further, it is possible to equip different leak detectors of the same device family with the same hose lines.