Importance

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Abstract

In an inductive flow meter, the magnetic field generator (11), provided for generating a magnetic field within a tube (10), is connected to a alternating current voltage source via an electronic switch (13). The switch (13) is controlled in such a manner that it becomes conducting only at a zero crossing of the alternating current, respectively, and subsequently remains in the conducting state until the next zero crossing of the exciting current (i) occurs. The useful voltage received at the electrodes (16a, 16b) is integrated in an integrator (19) whereby the noise voltage, coupled into the electrode loop by self-induction, is zero because of ##EQU1##

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First Claim