System Sensor 52051E Fixed Temperature Analogue Addressable Heat Sensor

The System Sensor 52051E is an analogue addressable fixed-temperature thermal heat sensor engineered for commercial, industrial, and institutional fire alarm applications. Operating on System Sensor’s addressable loop protocol, the device uses a state-of-the-art low-mass thermistor sensing circuit to deliver rapid, accurate alarm signaling upon reaching a static thermal threshold of 78°C (Class BS). It is specifically designed for installation in areas with high ambient temperatures, dusty conditions, or heavy steam where optical smoke detectors or standard 58°C heat sensors would trigger nuisance false alarms—such as boiler rooms, commercial kitchens, laundries, and industrial plant rooms. The sensor features mechanical rotary decade switches for fast addressing (01–99 / 01–159 depending on protocol), twin tri-color status LEDs offering 360-degree visibility, a remote indicator driver output, and full LPCB EN 54-5 certification.