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Moderne Lecksucher mit Vakuumtechnik
Author(s) -
Wetzig Daniel
Publication year - 2018
Publication title -
vakuum in forschung und praxis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 13
eISSN - 1522-2454
pISSN - 0947-076X
DOI - 10.1002/vipr.201800680
Subject(s) - leak , residual gas analyzer , leak detection , gas pressure , foil method , residual , gas leak , nuclear engineering , vacuum chamber , mechanical engineering , engineering , process engineering , chemistry , materials science , computer science , composite material , petroleum engineering , chromatography , mass spectrometry , organic chemistry , algorithm , environmental engineering
Summary Modern leak detectors in vacuum technology In many areas of industrial manufacturing, quantitative leak tightness measurements are required in order to analyze product quality. This article examines three approaches to vacuum leak testing, which utilize different measuring principles and completely different working pressures. The processes are divided into “non‐gas selective”, “single gas selective” and “double gas selective”. The pressure rise method does not work gas‐selectively. In so‐called foil test chambers the pressure rise measurement is used in optimized design and is particularly suitable for leak testing in the food industry. The classic test gas vacuum leak detection is a gas‐selective method. The test gas is selectively detected and the chamber is pumped independently of the type of gas. Major innovations in current device solutions are the extension of the measuring range and improved convenience in use. To achieve a detection limit of less than 10 −12 mbar·l/s, a double gas selective operation is used, residual gases from the test chamber are selectively pumped, additionally, the test gas detection is selective.