Abb Metering Limited

Zareh Soghomonian Salmasi

Gerard MacManus

Wu Jin

Ronald David Gregg

Craig Timothy Howarth

An electromagnetic flow meter and method of operating the same. There is provided a flow measurement duct, a magnetic circuit including pole pieces for generating a magnetic field in fluid flowing in a direction in the duct across the direction of flow, and an electrical circuit including at least one sensing electrode for measuring a voltage thereby induced in the fluid to provide an output indicative of the flow. The method comprises measuring a series of pairs of outputs of the electrical circuit, each pair of outputs comprising an output when the magnetic field is present and an output when the magnetic field is absent, and determining from the measured series of pairs of outputs whether fluid is present or absent in the duct.

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Luton, United Kingdom

Zareh Soghomonian Salmasi