Sick reflex photoelectric sensors
With photoelectric reflex sensors, the emitted light beam is reflected by a reflector and then received and evaluated by the device. Polarisation filters prevent incorrect operation when reflective objects are detected. Transparent films and shrink wrap may influence the way in which the reflex photoelectric switches with polarisation filters function. Devices with reduced sensitivity solve this problem. The use of laser diodes allows greater scanning ranges while simultaneously maintaining a high resolution. Focus ranges can be set with high precision.