The most common used application in industry is to automatically determining when a machine should be shut down due to an interruption.
The industrial proximity sensor can be different shapes and sizes, from the compact sensor that detects individual parts to larger sensors used to detect objects at a distance. They can also be different types, from inductive sensor for metal parts to capacitive sensor for non-metallic objects.
Since the proximity sensors are contactless, they can be operated for millions of times.