System Sensor 5603 5600 Series 135°F Fixed-Temperature Single-Circuit Mechanical Heat Detector

The 5603 5600 Series heat detector provides fixed-temperature activation at 135°F in a single-circuit configuration. Its mechanical design offers clear exterior markings to identify the activation method and temperature rating, plus a drop-down collector that indicates when the detector has activated.

For flexible installation, the reversible mounting bracket supports flush- or surface-mount setups with single-gang and octagonal back boxes. It also accommodates a four-square back box when used with a square-to-round plaster ring. Easy-to-use terminal screws help simplify wiring.