The SDM-E2 is a versatile maintenance tool for the Eagle 2 portable gas monitor. This docking station can be used as a stand-alone device for charging, calibration and bump testing, with all records automatically stored for future upload to a PC via USB flash drive. Up to ten SDM-E2 docking stations can be connected simultaneously using USB cables. The SDM-E2 is also equipped with two gas ports to connect up to two calibration gas mixtures to the multi module system.