Opto-sensor, one-way light barrier (receiver), operating voltage 24,250 VAC / 12,250 VDC, max. range 60,000 mm, plug, 7/8', protection class IP67, sensitivity adjustable via potentiometer, operating voltage: 12,250 VDC or 24,250 VAC, relay output, changeover contact (SPDT), light or dark switching adjustable via selector switch