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Heat Detector Model D-103 — Buy Heat Detector Model D-103, Price , Photo Heat Detector Model D-103, from Demco Industries, Sdn. Bhd. Fire heat detector on Allbiz Malaysia
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    Description
    Demco Heat Detectors D-103 employ the principle of electrother-modynamics, the science of relation between heat and electro-mechanical works. They are professionally designed to work reliably with most fire detection system with central control equipment.

    These units feature a double stage fire detection by employing two distinct methods: Rate-of-Rise and Fixed Temperature, both of which are open circuits designs designed to close an electrical circuit upon activation. The Demco Heat Detectors meet the requirement of UL521.

    ADVANTAGES
    Double sensitivity (rate of rise & fixed temperature)
    Interchangeable base
    Easy installation
    Double terminal wire connector
    LED indication
    Low power consumption
    Wide voltage variation
    Auto reset (rate-of-rise mode)
    Durable
    Interchangeable base
    MODE OF DETECTION
    • RATE-OF-RISE

    Being the first stage of detection, the Detector senses the rate-of-rise of temperature around its zone of coverage. When the rate of temper-ature increase exceeds 6 °C within 4 seconds, the Detector instantly switches from its normally open circuit to close circuit to activate the fire alarm. At the same time, the light emitting diode (LED) is illuminated indicating its active mode. It will remain active until the ambient temperature reduces substantially enough to automatically reset it back to its open circuit standby mode (dual detection mode).

    Under normal day temperature fluctuations, the Detector remains in standby mode. The current consumption while in standby mode is nil, and changes to 1.5 mA when the Detector is activated.

    • FIXED TEMPERATURE

    The Fixed Temperature method comes into action in cases of slow smoldering fire where the temperature does not increase at the rate that would trigger the Rate-of-Rise detection.

    At any time when the temperature in the zone of coverage reaches a predetermined point which is factory calibrated, a snap action mechanism switches the Detector from its standby open circuit mode to close circuit mode permanently. Once this has taken place, the unit will not reset itself and the LED indicator will stay lighted. Replacement of the set is required.



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