| 摘要 |
PROBLEM TO BE SOLVED: To realize an electromagnetic flowmeter by which a flow rate value can be measured easily in a short time, by a method wherein the conductivity of a fluid is measured by using electrodes used to measure an electromotive force, and an error in the flow rate value is corrected on the basis of the conductivity of the fluid. SOLUTION: The electromagnetic flowmeter is constituted in such a way that a magnetic field is generated by an excitation coil installed at the outside of a measuring pipe, and that the flow rate value of the fluid flowing inside the measuring pipe is measured by detecting the electromotive force generated across the electrodes installed inside the measuring pipe. The electromagnetic flowmeter is provided with a means by which a constant current is supplied across the electrodes, by which the conductivity of the fluid is measured and by which the error due to the conductivity in the flow rate value is corrected.
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