Patent ID: 9429454
Filing Date: 2016-08-30
CPC Classification: G01F

Claim Text:
1. A magnetic flowmeter for measuring flow rate of a process fluid, comprising: a flow tube arranged to receive a flow of the process fluid therethrough; a first magnetic coil arranged proximate the flow tube to apply a magnetic field to the process fluid flowing through the flow tube; a pair of electrodes electrically coupled to the process fluid in the flow tube and arranged to sense a voltage induced in the process fluid related to the applied magnetic field and a flow rate of the process fluid; flow meter circuitry configured to apply an electric current to the first magnetic coil and receive the voltage sensed by the pair of electrodes; a first magnetic field spreader positioned proximate the first magnetic coil arranged to spread the magnetic field from the first magnetic coil and direct the magnetic field into the flow tube in a plane perpendicular to the flow of process fluid; and a tube exterior housing which extends around the flow tube and forms a portion of a magnetic circuit with the first magnetic coil, wherein the tube exterior housing comprises a magnetic wrapper which extends around an outer circumference of the flow tube in the plane perpendicular to flow of process fluid and is magnetically coupled to the first magnetic coil.