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Question
What is a Photoelectric Sensor?
Answer
A photoelectric sensor is the one to detect presence and the state of the object by the change in light.
1. What is a photoelectric sensor?
Amount of light (luminance) is converted to an electrical signal, certain standard is set to a level of the electrical signal, the output is ON or OFF whether a level of an electrical signal (amount of light entered) is high or not than the standard.
2. Classification of photoelectric sensor
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