Photoelectric Sensors (Background Rejection, Block Style): Type - Ultrasonic Sensor; Sensing Range - 400mm (15.75"); Voltage Range - 20-30V DC; Output Configuration - PNP, NO; Connection Type - Connector, 4-pin; Connection Size - M8x1; Construction Style - Rectangular, Threaded Base; Sensing Position - Side; Material - Polycarbonate; Enclosure Rating IEC - IEC IP67; Switching Frequency - 300 kHz; Temperature Rating - -25 to 70degC (-13 to 158degF); Nominal Dimensions - WxDxH .47x.91x1.58" (12x23x40mm)