Patent ID: 7426852

Claim:
A control system for controlling the processing of an aerated fluid comprising: a submersible meter adapted to be disposed in the aerated fluid for measuring at least one parameter of the fluid; said submersible meter including: a tube submersible within the aerated fluid having an open input end and an open output end for receiving only a portion of the aerated fluid; an array of sensors, each sensor being disposed at different axial locations along the tube and measuring at a corresponding axial location an acoustic pressure propagating axially through the aerated fluid in the tube, each sensor providing a measured signal indicative of the acoustic pressure at said corresponding axial location; a signal processor, responsive to said measured signals, which outputs at least a gas holdup of the aerated fluid, and wherein the signal processor determines the gas holdup using an array processing algorithm; and a control device receiving said gas holdup and controlling the at least one process parameter to a desired level.