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Fire alarm systems are required in most commercial buildings. They may include smoke detectors, heat detectors, and manual fire alarm activation devices (pull stations). All components of a fire alarm system are connected to a fire alarm control panel. Fire alarm control panels are usually found in an electrical or panel room.
A heat detector will provide a warning of a fire in these specific areas without being affected by non-fire related activities or particles. [1] This allows extra time to evacuate the building or to put out the fire, if possible. Mechanical heat detectors are independent fire warning stations that—unlike smoke detectors—can be installed in ...
Smoke detector mounted on a ceiling. A smoke detector is a device that senses smoke, typically as an indicator of fire.Smoke detectors/alarms are usually housed in plastic enclosures, typically shaped like a disk about 125 millimetres (5 in) in diameter and 25 millimetres (1 in) thick, but shape and size vary.
An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, [1] typically as an indicator of fire. [2] They are used to detect fires in buildings where standard point smoke detectors would either be uneconomical [ 3 ] or restricted for use by the height of the building.
Within the International Organization for Standardization (ISO), Technical Committee ISO/TC 21/SC 11 is responsible for the development of standards concerned with smoke and heat control systems and components. [3] In Australia and New Zealand, joint standard AS/NZS 1668.1:2015 aims to provide:
A flame detector is a sensor designed to detect and respond to the presence of a flame or fire, allowing flame detection.Responses to a detected flame depend on the installation, but can include sounding an alarm, deactivating a fuel line (such as a propane or a natural gas line), and activating a fire suppression system.
Since thermal imaging cameras can "see" through darkness or smoke, they allow firefighters to quickly find the seat of a structure fire, or see the heat signature of visually obscured victims. [9] They can be used to search for victims outdoors on a cool night, spot smoldering fires inside a wall, [10] or detect overheating electrical wiring. [4]
Linear heat detection (LHD) cable is essentially a two-core cable terminated by an end-of-line resistor (resistance varies with application). The two cores are separated by a polymer plastic, that is designed to melt at a specific temperature (commonly 68 °C for building applications [1]), and without which causes the two cores to short.
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