Baumer O300.GL-PV1T.72N Diffuse Sensor with Background Suppression (BGS), Pulsed Red Laser Diode, 11-30VDC, 30-250mm Sensing Range, qTeach, Light/Dark Operate, M8 4-Pin Connector, IP67, 32.3 x 12.9 x 23mm (HWD) $314.00 Select