Cylindrical Ultrasonic Sensor Case Material Plastic Diameter 18 mm Detecting Distance 508mm NPN Output Circuit Type NO Max Load 40 mA Electrical Connection 4 Pin M12 Male Connector Length 3.06 in Width 0.71 in Power Required 12 to 24V DC NEMA Rating 4X IP Rating 67 Operating Frequency 300 kHz Standards CE RoHS UL Operating Temp Range -22 Degrees to 152 Degrees F Description/Special Features Tamper Proof