WTB4S 3E1331 SICK Background Suppression Photoelectric Sensor block type detectable range from 4 mm to 120 mm cable 2 m connection NPN output precise positioning LED light source threaded W4S 3 series
WTB4S 3E1331 SICK Background Suppression Photoelectric Sensor block type detectable range from 4 mm to 120 mm cable 2 m connection NPN output precise positioning LED light source threaded W4S 3 series