Baumer FHDK 14N6901/S35A Diffuse Sensor, Background Suppression (BGS), Pulsed Red LED, 40-200mm Range Tw, Teach-In Sensing Adj., 10-30VDC, Light/Dark Operate, NPN, <100mA, M8 4-Pin Connector, 43 x 14.8 x 31mm (HWD), Plastic Housing, PMMA Optics, -25 to +65°C, IP67 $414.00 Select