Inertial Measurement Unit (IMU)

• A 3-axis gyro has X-, Y- and Z-axis gyros which measure rotation about each axis. A 6-axis unit adds X-, Y- and Z-axis accelerometers which measure motion, while a 9-axis one adds X-, Y- and Z-axis magnetometers/compasses which measure orientation relative to a (usually the Earth’s) magnetic field.

Ethan Childerhorse says that the Bosch imus are the best.

Vince loves the TDK imus, like the ICM-42670.