A MEMS concept referring to the measurement of the inclination or angle of change with respect to gravity. Typical applications include industrial equipment platform stabilization and landscape/portrait detection on handheld devices.
A tilt sensor can measure the tilting in often two axes of a reference plane in two axes. In contrast, a full motion would use at least three axes and often additional sensors. One way to measure tilt angle with reference to the earths ground plane, is to use an accelerometer. Typical applications can be found in the industry and in game controllers.