Sniffing Leak Detector Having a Nanoporous Membrane
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United States of America Patent
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Issued Date -
Mar 31, 2016
app pub date -
May 14, 2014
filing date -
May 22, 2013
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Abstract
A sniffing leak detector for sucking in and analyzing gas, including a sniffing probe for sucking in the gas, a gas-conveying pump connected to the sniffing probe, and a mass spectrometer connected to a vacuum pump for analyzing the sucked-in gas in a high vacuum. The gas flow through the sniffing probe is conducted along a membrane having gas-permeable pores. The membrane allows part of the gas to flow into the prevacuum of the vacuum pump for the mass spectrometric analysis of the gas in a high vacuum. The diameter of the pores is less than or equal to the free path of air at atmospheric pressure and room temperature in order to improve the detection limit of the sniffing leak detector.
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