Electromagnetic flow meter with wide band preamplifier

Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties

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G01F 160

Patent

active

044585420

ABSTRACT:
An electromagnetic flow meter includes a preamplifier with extremely long time constant to achieve wide band operation. To alleviate undesirably long recovery from transients and the like, an effective dc bias is obtained by periodically resetting the bias levels. The invention is applicable outside the field of electromagnetic flow meters.

REFERENCES:
patent: 3603146 (1971-09-01), Bennett et al.
patent: 3759097 (1973-09-01), Cushing
patent: 3802263 (1974-04-01), Krechmery et al.
patent: 3839912 (1974-10-01), Schmoock et al.
patent: 3955413 (1976-05-01), Steele et al.
patent: 4306191 (1981-12-01), Bader

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