Opto-sensor, one-way light barrier (receiver), operating voltage 10.30 VDC, max. range 150000 mm, connector, 7/8', 3-pin, protection class IP67, ambient temperature: -40.+70 °C, modulation frequency C, requires transmitter with the same frequency, operating voltage 10.30 VDC, bi-modal switching output (NPN or PNP, depending on the connection)