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Operating Principle 
PRINCIPLE OF OPERATION
Whenever an obstacle is placed in a flowing fluid, vortices are generated alternately on both sides of the obstacle. The frequency of vortex generation is directly proportional to the velocity of the fluid and is independent of all other parameters.
Thus,
F α V — Frequency is directly proportional to velocity.
F = KV — Frequency gives inference of velocity.
Where
F = Frequency of Vortex Generation
V = Velocity of Fluid
K = Proportionality Constant
KARMAN VORTEX STREET IN PIPELINE
Flow Rate (M^{3}/Hr) = Area of Pipe in M^{2} x Velocity of Fluid in M/sec x 3600 seconds


