Product Description G1956B 1100 LC / MS systems Mass Range: 50-3000 Vacuum Pump ESI Source GMI can configure your complete LC MS system The Agilent G1956 LC/MSD Mass Spectroscopy Instrument is a highly reliable, laboratory-grade mass selective detector. This spectroscopy unit is equipped with its own license and software suitable for connecting this instrument to a computer unit. The system comes equipped with an E2M30 rotary vane dual stage mechanical vacuum pump which handles vapor quickly and operates quietly to ensure minimal noise production and a high level of productivity.