Patent ID: 6944359

Claim:
An optical fiber photoelectric sensor unit which includes a rail attachment part on a bottom surface, a display part and an operation part on a top surface, fiber inlets on a front surface, and a cord drawing-out or connector type output part on a rear surface, and which is not more than 15 mm in a longitudinal direction of a rail, said optical fiber photoelectric sensor unit comprising: two sets of light-emitting and light-receiving circuits corresponding to a first and second detection channels; a single CPU which performs detecting operations of two detection channels by time sharing; two output lines corresponding to two detection channels; four fiber inlets aligned vertically on the front surface, lower two inlets being a pair of light-emitting and light-receiving inlets corresponding to the first detection channel, and the upper two inlets being a pair of light-emitting and light-receiving inlets corresponding to the second detection channel; a first and second digital display parts which each display a string of digits in a longitudinal direction of a case and which are arranged in the longitudinal direction of the case on the top surface, wherein the first digital display part displays an amount of received light of the first detection channel, and the second digital display part displays an amount of received light of the second detection channel.