Arrangement for inductive measurement of the rate of flow of a liquid

摘要

To measure the rate of flow of slowly flowing water courses or the like, an inductive passing flow meter is proposed, which has an intermittently motor-driven permanent magnet (3) for generating a periodically alternating, open magnetic field transverse to the direction of flow (17). The voltage picked off at the electrodes (15) is freed of electrochemical interfering DC voltages in successive compensation cycles, whereby even interfering voltage fractions changing nonlinearly with time are compensated. <IMAGE>