"SWIRL FLOW METER" . "u20683" . "2006.06.08" . "A velocity flow meter that is designed to convert the effects caused by vortices in a flow into the frequency of the output signal that is proportional to the volumetric flow rate." . "SWIRL FLOW METER" . "The transducer incorporates a set of fixed swirl blades in a straight pipe. These blades impart a swirling motion to the fluid, producing an unstable oscillation and precession of fluid around the axis of the tube. The frequency of oscillation is proportional to the volumetric flow rate." . . "RDS1009754" . "Qualified" . "20805200" .