A proximity sensor is a type of sensor that can detect the proximity of an object and is widely used in industrial automation, smart devices, and other fields. There are mainly the following types: Inductive Proximity Sensor: Principle: It works by detecting changes in the electromagnetic field caused by metal objects. Features: Can only detect metal objects, fast response speed, strong resistance to environmental interference. Applications: metal detection, mechanical processing equipment, automated production lines, etc. Capacitive proximity switch (Capacitive P)