Detector type Heat
Principal sensor Thermistor
Number of sensors Multiple
Suitability Commercial
Industrial
 
 

The Series 65 range of conventional detectors incorporates well-proven sensing technologies, together with advances in materials and electronics technology.

The A1R 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.

The A1R is a rate-of-rise detector, designed to detect a fire as the temperature increases, but it also has a fixed upper limit at which the detector will go into alarm if the rate of temperature increase has been too slow to trigger the detector earlier.

Features:
• Advanced electronic technology.
• Flashing LED option.
• Magnetic test switch option.
• Can be used on security systems when used with a relay base.
• Electrically and mechanically compatible with Series 60.
• Proven detection performance.


The Series 65 range of conventional detectors incorporates well-proven sensing technologies, together with advances in materials and electronics technology.

The A1R 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.

The A1R is a rate-of-rise detector, designed to detect a fire as the temperature increases, but it also has a fixed upper limit at which the detector will go into alarm if the rate of temperature increase has been too slow to trigger the detector earlier.

Features:
• Advanced electronic technology.
• Flashing LED option.
• Magnetic test switch option.
• Can be used on security systems when used with a relay base.
• Electrically and mechanically compatible with Series 60.
• Proven detection performance.


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