OPTICAL PROXIMITY SWITCH SERIES K21 R RETROREFLECTIVE SENSOR, SN=6000 MM, PNP, LIGHT-ON/DARK-ON FUNCTION, ADJUSTABLE, SURPLUS LIGHT, M8 CONNECTOR, 10-30 V DC, IA=100 MA, WITH ADJUSTABLE SENSITIVITY, WITH M18 CASING ENTRY HORIZONTAL AND VERTICAL || 3RG74