Fire Alarm System

  • Addressable Smoke Detector

    Optical Smoke Detector
    The Context Plus XP95 optical detector uses the same outer case as the ionisation smoke detector and is distinguished by the indicator LED which is clear in standby and red in alarm. Within the case is a printed circuit board which, on one side, has the light proof labyrinth chamber with integral gauze surrounding the optical measuring system and, on the other, the address capture, signal processing and communications electronics.

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  • Conventional Smoke Detector

    Model D-213

    DEMCO Photoelectric Smoke Detector D-213 with its new sensor design incorporates an internal pulsing LED and a photo-diode at an obtuse angle, is ideal for applications where slow-burning or smouldering fires are likely.

    The D-213 has an advanced solid-state, low-voltage, surface-mount circuitry and are designed for 2-Wire installation using the D3X001 universal base. The detector head is installed into the base with a simple twist-lock action.

    The 360-degree detector design permits smoke entry from any direction, and a unique sensing chamber that permits operation in open areas with air velocities from 0 to 300 fpm.

    A fine wire mesh extending between offset ports in the exterior and interior walls screens insects from the chamber and obstructs light from passing directly to the interior part.

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  • Fire Alarm Sounder

    Demco alarm bells are professionally designed to meet the needs of fire fighting and detection system with central control equipment.

    The simplicity of the design incorporates fewer working parts, easy installation and high level of efficiency capable for operating under most adverse conditions. Demco alarm bells are designed to meet the requirements of EN54-3:2001.

    Advantages

    • Well proven high reliability
    • Interchangeable base
    • Wide operating voltage range
    • Zero standby current
    • Low current consumption
    • Loud and clear ringing tone
    • Universal application-available in three DC voltages — 6V, 12V and 24V. AC voltages available in 110V and 240V for use with most alarm systems.

    Model D-102
    Model D-102 is very suitable for Surface or Semi-Conceal fixing which in this case the base of bell can be sunk into wall using a junction box so that the edge of the bell is only 12mm from the wall surface.

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  • Ionization Smoke Detector

    Ionization Smoke Detector
    The sensing part of the detector consists of two chambers – an open outer chamber and a semi-sealed reference chamber within. Mounted in the reference chamber is a low activity radioactive foil of Americium 241 which enables current to flow between the inner and outer chambers when the detector is powered up.

    As smoke enters the detector, it causes a reduction of the current flow in the outer chamber and hence an increase in voltage measured at the junction between the two chambers. The voltage increase is monitored by the electronic circuitry which triggers the detector into the alarm state at a preset threshold. An externally visible red LED lights up when in alarm. IP rating = IP23D

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