Patent ID: 7197943

Claim:
A flow meter comprising a tubular main-body and a cover plate carrying two pressure sensing devices on one side, wherein the tubular main-body has a venturi tube structure inside having an inlet of convergent shape and an outlet of divergent shape, and a seat is formed on outer surface of the tubular main-body having two separate recessions each of which has a penetrating hole connected separately to the convergent portion and divergent portion of the tubular main-body; the cover plate is mounted on the seat to form a cover to the seat; and the two pressure sensing devices carried on the cover plate are completely and tightly packed with silicon rubber and located separately above the corresponding penetrating hole on the tubular main-body; wherein the cover plate provides a rubber filling plate with two recessions on the bottom side, and the two pressure sensing devices carried on the cover plate are located separately in the two recessions of the rubber filling plate, and each of recessions is filled with silicon rubber for packing the pressure sensing devices.