FIELD: measuring instruments.
SUBSTANCE: the arrangement has a measuring tube in which there is a row of admission openings for securing of passing in the tube of several gas flows and a row of exhaust openings. At the ends of the tube there are at least two instruments of focusing of ultrasound radiation fulfilled in the shape of focusing lenses or reflectors of a parabolic construction and at least two instruments of transferring/receiving of ultrasound radiation each of which is located in the first focal point of corresponding instrument of focusing. In the variant of execution each instrument of transferring/receiving is located between the arrangement of focusing and the indicated first focal point. The axial direction of ultrasound rays between two instruments of focusing has similar density of energy and similar direction parallel to the axis of the tube.
EFFECT: the invention ensures increasing of precision of measuring of flows with irregular profile of speed, a simple construction.
14 cl, 8 dwg
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