System Sensor OSI-R-SS Reflected Type Beam Smoke Detector, 4-Wire

System Sensor OSI-R-SS Reflected Type Beam Smoke Detector, 4-Wire, Single-Ended, 8" Reflector and Integral Sensitivity Test, (Replaces BEAM1224) OSI-R-SS is a 4-wire conventional reflector-type linear optical beam smoke detector for use in fire alarm systems.  The beam operates primarily on the principle of light obscuration using an infrared beam. Optical beam smoke detectors are uniquely suited to protecting buildings with large open areas with high ceilings such as a warehouse or atrium. The OSI-R-SS detector is a combined transmitter/receiver unit that can be directly connected to a conventional detector circuit. This conventional, single-ended beam smoke detector is easy to install – only one side needs to be wired. Features Combined transmitter/receiver unit Wide 12° field of view Fast, easy, and intuitive beam alignment indicated by directional LED cross-hair arrows Long range coverage of 5-100 m (16-328 ft) is standard; no separate long-range kit required Highly resistant