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For gas appliances, a flame supervision device (FSD) – alternative name: flame failure device (FFD) – is a general term for any device designed to stop flammable gas going to the burner of a gas appliance if the flame is extinguished. This is to prevent a dangerous buildup of gas within the appliance, its chimney or the room. [1]
This linear 'sensor' is typically a few metres up to a few hundred metres in length. Open-path detectors can be contrasted with infrared point sensors . They are widely used in the petroleum and petrochemical industries, mostly to achieve very rapid gas leak detection for flammable gases at concentrations comparable to the lower flammable limit ...
Goodman Manufacturing was founded by HVAC dealer, Harold V. Goodman, in 1975 as a manufacturer of flexible air ducts and plastic blade registers. However, he turned his sights to fulfill a dream of manufacturing affordable HVAC equipment for households across the United States of America and beyond. [citation needed]
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Flame ionization detectors cannot detect inorganic substances and some highly oxygenated or functionalized species like infrared and laser technology can. In some systems, CO and CO 2 can be detected in the FID using a methanizer , which is a bed of Ni catalyst that reduces CO and CO 2 to methane, which can be in turn detected by the FID.
Fire detectors sense one or more of the products or phenomena resulting from fire, such as smoke, heat, infrared and/or ultraviolet light radiation, or gas.. In dwellings, smoke detectors are often stand-alone devices.
Flame rectification is a phenomenon in which a flame can act as an electrical rectifier. The effect is commonly described as being caused by the greater mobility of electrons relative to that of positive ions within the flame, [ 1 ] and the asymmetric nature of the electrodes used to detect the phenomenon.
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