proximity sensor types
Proximity switches or Proximity sensors are types of switch/sensors which monitor an object's presence through their own no-touch method. These sensors are available in many guises, including capacitive, inductive, photoelectric and ultrasonic. Every kind of these sensors work differently but they all detect objects which come close to them over a certain distance. On industrial products proximity is used to detect the position of parts, count a number or stop down movements before they hurt someone. Each kind of switch has different technical characteristics but generally speaking they work by utilizing an electrical field, a magnetic field, light or sound waves with which to recognize objects. In other words, photoelectric sensors are used in production, robotics and automatic door systems.