An Inertial Measurement Unit (IMU) is a sensor device that measures and reports an object's specific force (acceleration), angular velocity (rotation rate), and sometimes magnetic field strength. It typically uses a combination of accelerometers, gyroscopes, and sometimes magnetometers to detect changes in an object's motion and orientation in space.
IMUs are critical in motion tracking for a wide range of applications like Construction, Robotics, Mining, Trucking and Defense applications in harsh environments.