Knudsen cell


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Knudsen cell

[kə′nüd·sən ‚cel]
(physical chemistry)
A vessel used to measure very low vapor pressures by measuring the mass of vapor which escapes when the vessel contains a liquid in equilibrium with its vapor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
This adaptation enables application of holder with Knudsen cell. The resulting configuration is capable of detecting extra-low gas pressures in metals and alloys.
The device enables to apply following instrumental methods: heat flow differential scanning calorimetry (DSC), differential thermal analysis (DTA) and Knudsen cell combined with mass spectrometry (KC/MS).
The STA 409 / QMS (403/5) apparatus can be used for special measurement using Knudsen cell. This equipment consists of special single alumina crucible (Knudsen cell) covered by lid with small orifice.
The equilibrate sample gas phase is jetted from Knudsen cell into ionisation chamber of mass spectrometer.