Automatic Detection

Break Glass Units

Used on all fire systems, these units raise the alarm manually when someone fractures the white glass or plastic.

Optical Smoke Detectors

Commonly used in most areas where a fire may occur from combustible materials such as paper, wood and textiles.

Ionisation Detectors

Not as common as optical and have historically been used for clean burning fires such as metholated spirits, petrol or paint thinners. These detectors are more sensitive to this type of fire than optical detectors.

Heat Detectors - fixed temperature

Used where a smoke detector cannot be used because of false alarm problems such as smoke, condensation or dust. This would be in areas like kitchens or boiler rooms which have fluctuations in temperatures.

Heat Detectors - rate of rise

These detectors work by sensing a sharp rising change in temperature and are not to be used in a kitchen or boiler room where the temperature can rise and fall quite rapidly. The ideal place would be a garage where fumes restrict use of smoke detectors, or a dusty environment.

Multi-sensor detectors

These are detectors with both smoke and heat elements and can be used with a number of different combinations. Either a mixture of smoke and heat is required to trigger the detectors or they may be timed to operate heat in the day and smoke at night.

CO Detectors

These detectors pick up the carbon monoxide given off from a fire at the smouldering or red ember stage of a fire. These detectors can be used where it’s impractical to use a smoke detector but a heat detector is not appropriate.

Beam Detectors

Used in buildings with high ceilings such as warehouses. They will sense smoke at higher levels than a standard detector and can save money on installation time.

Air Aspirating Detectors

Working on a similar basis to optical smoke detectors, these detectors are highly sensitive and pick up very small amounts of smoke.

Flame Detectors

Utilised in any area where a sudden flash of heat/flame may occur and the need to detect this immediately is of paramount importance.

Linear Heat Cable

This is a special cable spanning the area to be protected. Once the ambient temperature rises above a certain level the wire’s resistance value changes or short circuits and provides an alarm.

Video Fire Detection

By using standard CCTV video cameras the picture is analysed back at a main computer and certain patterns are monitored to detect the visual image of smoke and infrared radiation from heat.

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