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  • Operating Principles for Photoelectric Sensors
    These sensors use light sensitive elements to detect objects and are made up of an emitter (light source) and a receiver. Four types of photoelectric sensors are available. Direct Reflection (Diffused) - emitter and receiver are housed together and use the light reflected directly off the object
  • A background check for photoelectric sensors
    to focus reflections from a target and from the background on two different light receivers. The sensor decides whether there is a target present based on which receiver is getting more light. Electronic background suppression uses a similar logic about reflections but employs a continuous array
  • Sensor Sense: Seeing the light
    All photoelectric sensors use a light source to signal the presence or absence of an object. There are three basic methods of photoelectric sensing. All sensors have a light source or transmitter (TX) and a light detector or receiver (RX). Both thru-beam and retroreflective sensors are usually
  • Light Sensors
    Light sensors often use an infrared LED as a light source. Infrared LEDs have a greater intensity than LEDs that emit visible light. And when infrared photodiodes are used the sensors are relatively insensitive to ambient light. Photoelectric light sources are often modulated at a given frequency
  • Ultrasonic sensors
    monitor if levels become too low (dry-up) or too high (overflow.) can measure distance without contact. They bridge the gap between proximity and photoelectric sensing. They possess a longer sensing distance than inductive or capacitive proximity sensors and remain unaffected by target color, ambient

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