Discriminating fire sensor with thermal override capability

Details Discriminating fire sensor with thermal override capability Discriminating fire sensor with thermal override capability

G - Physics

08

B

340/155.2

G08B 17/06 (2006.01) G08B 17/12 (2006.01)

Patent

CA 1247211

DISCRIMINATING FIRE SENSOR WITH THERMAL OVERRIDE CAPABILITY ABSTRACT A fire sensor apparatus (10) of the type having a discriminating fire sensor portion (12, 14) for detecting radiation in at least different spectral bands associated with a fire and for providing an output signal in response to predetermined amounts of radiation in those spectral bands associated with a particular size and type of fire to be detected. A novel heat sensor channel (50) is provided, which provides a further output signal in response to an amount of detected heat radiation greater than that associated with the fire of the type and size to be detected. A heat override function is thereby provided to permit the generation of an output signal even when contaminants block the action of the discriminating fire sensor portion.

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