Electromagnetic flowmeter having low power consumption
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United States of America Patent
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May 29, 2001
Issued Date -
N/A
app pub date -
Oct 15, 1999
filing date -
Apr 25, 1997
priority date (Note) -
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Abstract
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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