Fork Sensor
A fork sensor which is also called “Slot sensor” is based on the same basic principle of through-beam photoelectric sensors.
These types of photoelectric sensors which are U shaped, combine emitter and receiver in a single housing while the sender emits light beams to the receiver concentratedly. As soon as the light beam from the sender is interrupted by an object, the switching output will be switched.
Fork sensors are used for detecting small objects, labels and print marks, even on transparent films.