Flame Detectors

It responds to the UV radiation emitted by flames during combustion. The Apollo Fire 55000-027MAR has a single UV sensor with a narrow spectral response, in order to discriminate between flames and most spurious sources of radiation. It responds to stationary flames with no flicker and is designed to protect enclosed indoor areas where open fires may be expected.

IR flame detectors use one, two or three infrared sensors (single IR, dual IR or triple IR), and multi-sensor types compare IR wavelengths to tell flames from other radiation. The Hochiki DRD-E uses single IR technology, the Kidde BG-21 is a dual IR detector, and the Apollo Fire 55000-024APO is an IR3 detector whose three IR sensors respond to different IR wavelengths.

A UV-IR flame detector combines ultraviolet and infrared sensors in one detector. The Fike FIK-UV-IR-AS11 is a UV-IR detector for hydrocarbon fires, visible and non-visible, and for hydrogen fires, and its UV and IR warning levels give a 0-20mA current output warning when elevated UV or IR radiation is detected.

By the flicker or the wavelengths of the radiation it receives. The Apollo Fire 55000-020APO is sensitive to low frequency, flickering infra-red radiation emitted by flames during combustion, and detects through films of oil, dust, water and ice. The three IR sensors of the Apollo Fire 55000-024APO respond to different IR wavelengths in order to discriminate between flames and spurious sources of radiation.

It is a detector that responds to open flames, whether large flames or the flame of a cigarette lighter, according to the model. The Apollo Fire 55000-020APO is designed to protect areas where open flaming fires may be expected, the Kidde BG-21 is a point flame detector for fires involving combustion of carbonaceous materials, and the Hochiki DRD-E is designed for internal use to detect large flames. The Takex FS1000E flame sensor brings attention to the use of cigarette lighters, matches and other open flames.