FIELD: data-processing and measuring systems of oil, chemical, oil refining industries. SUBSTANCE: device has vertical metering chamber 1 with inlet and outlet pipes, two piezoelectric transducers 2,3, switching device 4, volume discharge metering unit 5, density metering unit 6, control unit 7, and two computing and recording devices 8,9. EFFECT: enlarged functional capabilities. 2 dwg
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