Ultrasonic sensors detect the position of objects with a sound-reflecting surface. They may be used at an operating distance of up to 6 meters
Photoelectric Sensors "see" light-reflecting or opaque objects at an operating distance of 5 meters and more. They can also be used with
fiber-optic cable for detection of extremely small objects.
Proximity Sensors :There are two types Inductive and Capacitive. Inductive sensors detect metallic objects at an operating distance of up to 50mm.
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Sensors
Proximity Sensors :There are two types Inductive and Capacitive. Inductive sensors detect metallic objects |