Thru-beam sensor, flat design, space-saving M2 mounting, 500 mm detection range, red light, dark on, PNP output, with 0.2 m fixed cable and M8 plug, 4-pin, Very flat design for direct mounting without mounting bracket, DuraBeam Laser Sensors - durable and employable like an LED, TEACH-IN, Detection of partially transparent objects by teach-in, Detection of small parts or flat objects from 0.25 mm