System Sensor 5604 Mechanical Heat Detector

System Sensor 5604 is a 194°F (90°C) Fixed Temperature Mechanical Heat Detector; Single circuit type, normally open. The 5604 is part of System Sensor’s 5600 Series of Mechanical Heat Detectors. A reversible mounting bracket (included) permits both flush- and surface-mount back box installations. Mounts to: —3½-inch octagonal back box —4-inch octagonal back box —Single gang back box —4-inch square back box with a square to round plaster ring