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- W98415654 abstract "The basic problems arising in the design of electromagnetic flowmeters are described and the ways in which these are overcome are explained. The problems include (1) spurious DC or low frequency potentials across the electrodes, (2) transformer signals associated with the need to use a changing magnetic field, (3) the difficulty in predicting sensitivity and (4) velocity profile effects. The methods of overcoming these problems include AC sine wave or square wave magnet excitation, phase sensitive detection, use of Hall probe, search soil, feedback, magnetic field shaping and the use of contactless electrodes. Ways in which future electromagnetic flowmeters may be designed to extend the range of liquids that could be metered, to improve the accuracy of measurement and to incorporate self-checking means are indicated. 22 references." @default.
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- W98415654 date "1981-01-01" @default.
- W98415654 modified "2023-09-27" @default.
- W98415654 title "Electromagnetic flowmeters: a state of the art review" @default.
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