The Hiden HPR-20 EGA is a bench top mass spectrometer with QIC (quartz inert capillary) that samples from 100 mbar to 2 bar gauge and is included as standard. The HPR-20 EGA system includes an external dry scroll pump to provide for high performance combined sample bypass and UHV foreline pumping, providing fast response and effective pumping for light gases. Effective pumping for light gases enables the use of helium as the carrier gas for TGA-MS studies without compromise to sample flow and response. The benefit of using helium as a carrier gas of choice for TGA-MS studies is the reduced mass spectral interference with helium, compared to nitrogen or argon for example.