Patent ID: 7866218
Filing Date: 2011-01-11
Classification: G01F,Y10T

Abstract:
1. An electromagnetic flow meter apparatus comprising: a flow conduit defining a flow path along which a fluid can flow, the flow conduit having: i) an inlet for receiving the fluid; ii) an outlet for outputting the fluid; and iii) a measuring section which extends along the flow path and which is positioned between said inlet and outlet; a coil positioned adjacent said measuring section for generating a magnetic field across the measuring section; and at least one electrode positioned adjacent said measuring section for sensing a voltage induced in the fluid flowing through the measuring section as a result of said magnetic field, which voltage varies with a flow rate of the fluid; wherein said measuring section is defined by a pressure containing vessel having first and second sections; wherein the first section is formed of a first material having a first magnetic permeability and the second section is formed of a second material having a second magnetic permeability that is different from the first permeability; and wherein said coil is located adjacent said first section of the pressure containing vessel.