Sensors or instruments that detect inclination relative to the horizon, rotary position, angular rates or linear acceleration.
Gyroscopes are designed to measure angular rate or orientation about a given directional vector.
Inertial navigation systems use a combination of accelerometers and angular rate sensors (gyroscopes) to detect altitude, location, and motion. They may also be capable of detecting attitude, position, velocity, temperature, or magnetic field.
Tilt sensors measure tilt angle with reference to the earth’s ground plane.