Photoelectric Sensors
Photoelectric sensors are used in many industries and applications to accurately detect objects without physical contact.
Quite simply, a photoelectric sensor is as a "limit switch-like" device, where the mechanical actuator or lever arm function is replaced by a beam of light.
Photoelectric sensors operate by sensing a change in the amount of light that is either blocked or reflected by the target object. The change in light could be the result of the presence or absence of the target, or as the result in a change of the size, shape, reflectivity or color of a target. A photoelectric sensor can be used in applications to sense targets at distances from less than 5mm (0.2in) to over 250m (820ft).
Successful sensing with a photoelectric sensor requires that the target object causes a sufficient change of light level detected by the sensor and that the user has a clear understanding of the sensing requirements.
