Duct smoke detector

Details Duct smoke detector Duct smoke detector

G - Physics

08

B

340/147

G08B 23/00 (2006.01) G08B 17/103 (2006.01)

Patent

CA 1272780

ABSTRACT OF THE DISCLOSURE An apparatus for sensing smoke in a duct includes a housing with inlet and outlet ports and a flow chamber which directs gas flow on a path between the ports and to and from a smoke detector. A vaned rotor on the path is visible through a window in the housing and gives a visual indication of the existence or nonexistence and direction of gas flow and thus whether or not normally flowing duct gas is being sensed.

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