EC-50R | Edwards Signaling Reflective Beam Smoke Detector 15–160 ft Range 10.2–30 VDCDescription The Edwards Signaling EC 50R Reflective Beam Smoke Detector is a long range optical smoke detection system designed for open area protection in commercial and industrial facilities. Using a projected infrared beam and reflector, it monitors large spaces for smoke presence across distances from 15 ft to 160 ft. Operating on 10. 230 VDC, the EC 50R provides reliable detection performance with low current draw and built in alarm and trouble