| 摘要 |
<p>A sniffing leak detector which comprises a mass spectrometer, a turbomolecular pump and a forevacuum pump. In case that the sniffing hose with the hand-operated sniffing probe becomes detached from the main device, atmospheric pressure would pass into the gas inlet conduit and disrupt the high vacuum in the mass spectrometer. In order to protect the mass spectrometer and the vacuum pump apparatus, a flow restrictor with an upstream filter is arranged in the gas inlet conduit.</p> |
