Knudsen Effusion Mass Spectrometry (KEMS) is a proven vapour pressure measurement technique capable of evaluating partial vapour pressures at high temperatures. By use of the Knudsen cell, KEMS provides quantitative, kinetic and thermodynamic information about isotopes and compounds contained in the analyte by assessing the gaseous emissions. The KEMS instrument from MSI is built on the proven AutoConcept platform.
https://www.massint.co.uk/kems/knudsen-effusion-ms.php