S65 A1R 57° C Rate of Rise Heat Detector

The sensing part of the detector operates by using a matched pair of thermistors to sense heat. One thermistor is exposed to the ambient temperature, the other is sealed. In normal conditions both thermistors register similar temperatures, but on the development of a fire, the temperature recorded by the exposed thermistor will increase rapidly, resulting in an imbalance of the two thermistors and causing the detector to change to the alarm state.

Also available:

S65 BR 75° C Rate of Rise Heat Detector

S65 CR 90° C Rate of Rise Heat Detector

S65 CS 90° C Fixed Temperature Heat Detector