The Servoteknikk SWM-1L 57°C (37150) is a fixed temperature Heat Detector. It contains a bimetallic thermostat that closes its contacts at alarm temperature (57°C).
The design and function of the Servoteknikk SWM-1L 57 permits an unlimited number of function tests. Fire alarm is optically indicated on the detector by a LED. The indication remains on until the alarm has been reset on the central unit.