Retroreflective sensors consist of an emitter and a receiver aligned in the same housing. The emitter sends out light, which is then reflected back by an opposing reflector and detected by the receiver. When an object interrupts this light beam, the sensor recognizes it as a signal. This technology is effective for detecting objects that have clear contours and well-defined positions. However, small, narrow, or irregularly shaped objects may not consistently interrupt the focused light beam and, as a result, can easily be overlooked.
Post time: Oct-28-2025
