Thru-beam sensor (pair) OBE15M-18GK40A-SE2, Thru-beam sensor (pair), Thru-Beam Sensors, Short design in M18 plastic housing, Not sensitive to ambient light, Degree of protection IP67, Very high detection range, Detection of small parts or flat objects from 0.3 mm, Highly visible LEDs for Power ON and switching state, Easy to use