Patent ID: 8201462

Claim:
A recirculation 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 having an inlet and an outlet; a nozzle provided in the passage spaced apart from the inlet; optionally a flow conditioner provided between the inlet of the passage and the inlet of the nozzle; a sensing chamber formed in the body between the outlet of the nozzle and the outlet of the passage; a bluff body provided within said sensing chamber spaced apart from the outlet of the nozzle; an arcuate face provided to the bluff body facing the outlet of the nozzle, said arcuate face adapted to cause recirculation and diversion to the flow of fluid impinging on the arcuate face, on either side of the bluff body alternately; and 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.