A kind of method and apparatus are provided, for executing the measurement of the finance of at least one feature of flow within a pipe aerated fluid, wherein device includes at least a metering device, it is used to determine the mixture strength of fluid, the velocity of sound of the liquid portion of the velocity of sound and fluid of fluid, wherein at least one metering device generates the meter data of the mixture strength in response to fluid, the velocity of sound of the liquid portion of the velocity of sound and fluid of fluid. Device further includes that a processing equipment is communicated at least one metering device, and wherein processing equipment receives meter data and handles meter data to generate the measurement of at least one finance.
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