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Abstract

A flowmeter which is connectable in series with a fluid supply line and which functions to meter the rate of fluid flow through the supply line. The flowmeter incorporates a chamber into and through which fluid is passed, and an acousto-electrical transducer is located within the chamber for exposure to acoustical energy which is emitted by fluid passing through the chamber. The transducer is connected in circuit with a detector which is arranged to provide an output which follows the peak voltage of an amplified output signal generated by the transducer as a consequence of the transducer being exposed to acoustical energy of the fluid. A display device is incorporated in the flowmeter for providing a measure of the detector output, and hence of the amplitude of the transducer output, in terms of fluid flow rate.

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