DETECTORS
Fire detectors are designed to detect the characteristics of fire such as the smoke, heat and radiation (flame)
A combination of different types of detectors enables more safety, heat detectors are classified in to two types known as point type and line type.
Point type detectors respond to temperature of the gases, in the vicinity of a single point.
Line type detectors respond in the vicinity of a line.
SMOKE DETECTORS
Two types - known as the ionization chamber smoke detectors and optical type smoke detectors.
The principle of ionization chamber smoke detector is “electric current flowing between electrodes in an ionization chamber is reduced when smoke particle enters the chamber”
Optical type smoke detector operates by deflecting the absorption of light by smoke particles.
FLAME DETECTORS
Which includes ultraviolet- infrared detectors !
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