Patent ID: 8091434

Claim:
A feedback type, hydrodynamic oscillator flow meter for measuring the flow of fluids such as gas, air, water and oil, flowing through a conduit, said flow meter comprising: a meter body having a passage for the flow of the fluid, said passage defining an inlet and an outlet; a nozzle provided in the passage spaced apart from said inlet; optionally at least one flow conditioner provided between the inlet of the passage and the inlet of the nozzle; a bluff body placed in the passage spaced apart from the outlet of the nozzle; at least one sensor assembly comprising a sensor body having at least two sensing segments, leads extending from said sensing segments to a metering device located outside said meter body and at least one sensor fin extending from said segments into said passage; and two feedback paths provided in the body, each of the feedback paths having a feedback inlet in the passage between the bluff body and the outlet of the passage and a feedback outlet located between the outlet of the nozzle and the bluff body, to permit feedback flow of the fluid, alternately through either of the feedback paths.