Baumer UNDK 10P8914/KS35A Ultrasonic Proximity Sensor, Miniature, 12-30VDC, 10-200 Scanning Range Sd, Teach-in, PNP, NO/NC, 27 x 10.4 x 14mm Rectaungular, Plastic (ASA) Housing, M8 Flylead Connector (200mm Length), -10 to +60°C, IP67 $699.00 Select