Part Number : 55000-196
AlarmSense Standard (A1R) Heat Detector & Sounder Base Combination
Price:
£25.56 Excl. VAT
AlarmSense Standard (A1R) Heat Detector & Sounder Base Combination
The heat 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, the two 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 thermistors and causing the detector to change to the alarm state.
A rate-of-rise detector (A1R) has a fixed upper limit, but in addition, measures the rate of increase in temperature.
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