Photoelectric Sensor,Cylindrical Style,Transmitted Beam Receiver,20 20 m Sensing Range,Light Operate Dark Operate Output,NPN Output,Threaded Barrel,18 mm Barrel,4 Pin Micro M12 Integral Quick Disconnect Connector,Without Sensitivity Adjustment,42CS Photoelectric Sensor,Cylindrical Style,Transmitted Beam Receiver,20 20 m Sensing Range,Light Operate Dark Operate Output,NPN Output,Threaded Barrel,18 mm Barrel,4 Pin Micro M12 Integral Quick Disconnect Connector,Without Sensitivity Adjustment,42CS