A heat detector is a sensor device that responds to changes in ambient temperature. The heat detector will monitor temperature as part of a fire alarm system, and if the detector finds that the ambient temperature rises above a predetermined threshold an alarm signal is triggered. Heat detectors can also be further broken down into two main classifications of activation, "rate-of-rise" and "fixed." The most sophisticated units are activated by both conditions.

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Merseyrentacom supply a range of Heat Detectors for flats and houses. Please use our contact page for enquiries and to obtain price lists.

Information

Rate-of-rise heat detectors

Rate-of-rise (ROR) heat detectors react to the sudden change or rise in ambient temperature from a normal baseline condition. Any sudden temperature increase that matches the predetermined alarm criteria will cause an alarm. This type of heat detector can react to a lower threshold condition than would be possible if the threshold were fixed. A typical alarm may sound when the rate of temperature rise exceeds 12° to 15°F (6.7° to 8.3°C) per minute.

Fixed temperature heat detectors

This type of detector reacts when the ambient temperature reaches a fixed point. The most common fixed temperature point is 136.4°F (58°C). Recent technological developments have enabled the perfection of detectors that activate at a temperature of 117°F (47°C), providing increased time to escape.

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