B8199999EU Ion Source Filament Pfeiffer HLT260 / HLT550

Description

B8199999EU Ion Source Filament — Pfeiffer HLT260, HLT550, HLT560 Leak Detectors Ion source filament for the Pfeiffer HLT series — HLT260, HLT550 and HLT560 — carried under part number B8199999EU. The HLT line is a different platform from the ASM detectors and takes a different filament; ordering an ASM filament for an HLT is one of the more expensive mistakes in this catalogue. Interestingly, the same B8199999EU filament also serves the Edwards ELD500. If you run both machines, one spare covers both — worth knowing when stocking a workshop that services mixed equipment. Replace when the detector loses helium sensitivity while its vacuum readings stay normal, or when the controller reports an emission fault. Recalibrate against a calibrated leak after fitting: a filament change always shifts sensitivity.