Agilent Technologies 5977B GC/MS

The 5977B Series MSDs are equipped with a turbomolecular (turbo) pump or a diffusion (diff) pump.
There are three types of electron ionization (EI) sources available on the 5977B Series MSD
Standard EI stainless steel (SS) source
EI Extractor (XTR) source available on the Inert+ MSD model
High efficiency source (HES)
CI Chemical Ionization source includes a reagent flow control system, a CI calibration system, and other required hardware features.