Gas leakage detection apparatus
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United States of America Patent
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Mar 25, 1980
Grant Date -
N/A
app pub date -
Sep 25, 1978
filing date -
Oct 4, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas leakage detection apparatus is described comprising a mass spectrometer with which there is associated a first pumping device for creating a relative vacuum in the apparatus, a selective pumping device having a first pumping speed for air and a second pumping speed for the gas which is to be analyzed, said second pumping speed being lower than the said first pumping speed, and a throttling device connected between the selective pumping device and the first pumping device, this throttling device having an opening chosen so as to let through a flow which is very small compared with the flow produced by the selective pumping device for the air.
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