The cathode filament assembly is a consumable component for Pfeiffer gas-tight mass spectrometer systems, such as the Prisma Plus QMG 220. These cathode units feature dual yttria-coated iridium filaments and are completely unopened and unused. The part number, BN846395-T, was recently updated to 2000035123. Installation instruction can be found in the "PrismaPlus operating instructions" found online through the owning Busch Group.

Manufactured by the trusted brand Pfeiffer, this unit is a single piece that offers high quality and reliability. The dual Y-coated iridium filament ensures optimal durability for oxidative vacuums, making it an essential accessory for precision measurements and analysis in various industries.