NON CONTACT SENSOR
Photoelectric sensor
•A photoelectric sensor is a device used to detect the
distance, or presence of an object by using a light transmitter, often infra
red, and a photoelectric receiver.
Proximity sensor
•A proximity sensor is a sensor able to detect the presence of nearby objects without any
physical contact.
•Proximity sensors can have a high reliability and long functional life
because of the absence of mechanical parts and lack of physical contact between
sensor and the sensed object.
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