The paper represents results of theoretical and experimental research in the field of constructing noncontact flowmeters of granular and powder materials in pneumatic transportation. The task of flow measurement amounts to measuring the average flow density within the controlled profile and flow velocity. The possibility of testing flow average density by microwave sensors is substantiated. To measure the velocity of materialair flow use is made of correlative-extreme method of processing

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... s from density sensors in accordance with a specially developed algorithm. Keywords: Microwave density sensors, correlative-extreme method of velocity measuring, noncontact microprocessor-based flowmeter.