3DM-GV7 Tactical Grade Ruggedised IMUs Microstrain by HBK 3DM-GV7 Tactical Grade Ruggedized Inertial Measurement Units (IMUs) incorporate a precision-machined aluminium enclosure and are tested to an IP68 rating. Explicitly designed to meet the demanding timing requirements of the robotics and automation industries, these IMUs operate from -40°C to +85°C. The 3DM-GV7 ruggedized IMUs feature an advanced extended Kalman filter, cutting-edge orientation algorithms, advanced time management and an event-triggering system.