Photoelectric sensors are used where safe and non-contact de-tection of the exact position of objects is required. The material of the objects to be detected is of no importance. Compared to proximity switches photoelectric sensors have a much higher sensing zone. A Photoelectric Sensor consists primarily of an Emitter for emitting light and a Receiver for receiving light. When emitted light is interrupted or reflected by the sensing object, it changes the amount of light that arrives at the Receiver. The Receiver detects this change and converts it to an electrical output.
Inductive sensorsPhotoelectric sensorsCapacitive sensorsMagnetic sensorsUltrasonic sensorsValve sensorsCylinder sensors. Process sensors / Fluid sensors. Sensors for motion control. EncodersInclination sensorsSpeed sensors. Condition monitoring. Vibration sensors. A photoelectric sensor is used to detect the presence (or absence) of an object, or for measuring the distance between a point and an object. It uses visible red light or infrared light from a transmitter and also has a photoelectric receiver.
There are three major types of photoelectric sensors: thru-beam, retroreflective, and diffused. Each sensor has its own strengths and can be used in a variety of ways. Detects all kinds of materials(can detect any object, including glass, plastic, wood, or liquid). Fast response time. It is a cheaper sensor. Diffuse photoelectric sensor detects small objects including color mark and label detection.
