Fluid flow detector for a fire alarm system

Details Fluid flow detector for a fire alarm system Fluid flow detector for a fire alarm system

G - Physics

08

B

340/138, 340/73

G08B 17/04 (2006.01) A62C 37/50 (2006.01)

Patent

CA 1069602

ABSTRACT A sprinkler flow detector is described which can detect and rapidly respond to the onset of water flow in a sprinkler system which results, for example, from the release of one or more sprinklers, The detector senses the pressure vs. time profile of the system or house side of the sprinkler system. An increase in pressure is accurately tracked without causing alarm. If, however, the pressure falls in excess of certain predetermined rates and amounts, and holds in the lower state for in excess of a second certain predetermined amount of time, the detector enters an alarm state. In a preferred embodi- ment the detector features a trouble state in which it responds to one of several monitored conditions, for example, a component failure in the detector electrical circuitry, excessive pressure in the sprinkler system, or dangerously low pressure in the sprinkler system.

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