FIELD: measurement technology. SUBSTANCE: vortex flowmeter has streamlined body positioned across flow, two piezoelements installed antipodally behind streamlined body, two generators of ultrasonic oscillations, two phase detectors, former of difference-frequency signal in shape of D-trigger, two amplitude detectors, and adder. Frequency difference of generators makes up less than 2%. EFFECT: enhanced accuracy of measurement at low consumption of liquid. 1 dwg
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