Simple fire detector

Details Simple fire detector Simple fire detector

G - Physics

08

B

G08B 17/103 (2006.01) G01N 33/00 (2006.01) G08B 17/117 (2006.01)

Patent

CA 2058928

A fire detector that responds more rapidly than the widely used somke detectors senses increases in the concentration of carbon dioxide associated with a fire. The build-up of carbon dioxide is sensed by measuring the concomittant increase in the ab- sorption of a beam of radiation whose wavelength is located at a strong absorption band of carbon dioxide. The device is consid- erably simplified by the use of a window (48) to the sample chamber (44) that is highly permeable to carbon dioxide but which keeps out particles of dust, smoke, oil, and water. This permits the fire detector to be built of very inexpensive materials.

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