Varian
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The Varian 948 Helium Leak Detector is a helium mass spectrometer leak detector. The Varian 948 Helium Leak Detector is part of the 947, 948, and 960 leak detector family. The Varian 948 Helium Leak Detector can be configured with dry or wet pumps.[1][2]
The Varian 948 is a helium mass spectrometer leak detector that is part of a series also including the 947 and 960 models. The 948 model requires liquid nitrogen for its cold trap operation. The 948 has a weight of 510 lbs. Recommended turbo pumps for the 948 include the TV-70 and TV-70D, and recommended forepumps include the DS-202, DS-302, and DS-402.[4][1][3][2]
The Varian 948 uses a spectrometer tube and a turbomolecular pump to maintain the high vacuum required for operation. The 948 includes thermocouple gauges for pressure measurement in the main valve block and service block, and a test port for connection to the system under test. The 948 model also incorporates a liquid nitrogen cold trap to improve sensitivity by condensing background gases.[1][2]
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The following facts about the 948 Helium Leak Detector are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 948 Helium Leak Detector are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 948 Helium Leak Detector are on record.
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The control-system platform and OS era of the 948 Helium Leak Detector are not on record.
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Last updated Oct 1, 2026.
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