Computers and Electronics What causes a photo eye to operate? How do you align a photoelectric sensor? https://www.youtube.com/watch?v=OTYlLRwraIo What is a photo optic sensor? Photoelectric Sensors detect objects, changes in surface conditions, and other items through a variety of optical properties. A Photoelectric Sensor consists primarily of an Emitter for emitting light and a Receiver for receiving light. Related Posts:Which sensor tell your system is something open or closed?There are symptoms of a bad mass air flow sensor.What is the difference between indoor and outdoor fiber optic cable?Why is my garage door not opening or closing?