Patent ID: 7380439

Claim:
A flow measuring system for measuring a parameter of an aerated fluid flowing in a pipe, the measuring system comprising: a coriolis meter having at least one tube wherein fluid flows therethrough, the coriolis meter providing a frequency signal indicative of a natural frequency of a tube and/or phase signal indicative of a phase difference between a pair of tubes; a flow measuring device measures the speed of sound propagating through the fluid, the measuring device providing at least one of an SOS signal indicative of the speed of sound propagating through the fluid, a GVF signal indicative of the gas volume fraction of the fluid and a reduced frequency signal indicative of the reduced frequency of the fluid; and a processing unit determining a mass flow rate measurement indicative of the mass flow of a non-gaseous portion of the fluid in response to at least one of the SOS signal, the GVF signal, the reduced frequency signal and the phase signal, and/or determining a density measurement indicative of the density of the non-gaseous portion of the fluid in response to the SOS signal, the GVF signal, the reduced frequency signal and the frequency signal.