The manufacturer of the Agilent 5975 Inert Performance MSD is Agilent Technologies. The Agilent 5975 inert Performance MSD is all about reliability and improved performance. Built on the same platform as the popular Agilent 5973 series MSD the best selling GC/MS of all time the Agilent 5975 inert MSD is a big step forward in reliable performance that leverages new and smarter hardware and software technologies. There have been many improvements in the 5975 inert MSD. Some are obvious like the front glass window. Others are not so obvious, but are far more important to the overall system performance.