Single Infrared Beam Sensor Technical Specification : a) Operating Voltage : 12-24V DC/AC b) Detecting Range : < 15 Meter c) Infrared Frequency : 1.9Khz d) Wave Length : 940nm e) Operating Temperature : -10c ~ +70c f) Relay Output : N.C / N.O g) Dimension : 49.2x76x21.6mm CE FC RoHS IP55