System Sensor 5603 Mechanical Heat Detector

The System Sensor 5603 is a 135°F (57°C) Fixed Temperature Mechanical Heat Detector; Single circuit type, normally open. The 5603 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