What types of fire detectors are there?

Smoke-sensitive fire detector is a kind of fire detector that responds to solid particles produced by combustion or heat medium. According to the fact that smoke particles can directly or indirectly change the properties or intensity of some physical quantities, smoke detectors can be divided into ionic type, photoelectric type, laser type, capacitive semiconductor type and so on. (1) ion smoke detector is constructed and works by air ionization fire detection method, which is usually only suitable for point detectors. The detection mechanism of ion smoke detector is: when a fire happens, after smoke particles enter the ionization chamber, positive ions and negative ions in the guided part (region) are adsorbed on the smoke particles, so that the probability of neutralization of positive ions and negative ions increases', thus the concentration of smoke particles is expressed by the change of ion current, and the detection of fire parameters is realized. . . (2) According to the absorption and scattering of light by smoke particles, photoelectric smoke detectors can be divided into two types: light reduction type and light scattering type.