Agilent Varian 979, 959, 938, 936 Ion Source Thoriated Iridium Filaments for Helium Leak Detectors

This is an Ion Source Thoriated Iridium Filament for the Agilent Varian 979, 959, 936, 936SP, 938-41 Portatest, Helium Leak Detectors. This Thoria long life ion source is for the newer model 979 Leak Detector, but can be used in older models 936 and 936SP, 938-41 Portatest models. For the Older 936 Cabinet Models with enhancement kits, redirect the flexible metal tube away from the spectrometer tube. For 936SP Cabinet Models, if the unit has a spectrometer cooling fan, unplug it. For models without a spectrometer cooling fan, the IRIDIUM/TUNGSTEN switch must be in the IRIDIUM position. For the 938-41 Portatest Model with serial numbers between 62E001-62E171 contact Agilent Varian. For 938-41 Portatest with serial numbers later than 62E171, the IRIDIUM/TUNGSTEN switch must be in the IRIDIUM position. This is the Ion Source Filament ONLY, leak detectors sold separately on this website.