Method of controlling physical characteristics of fluid medium

摘要: A method of controlling physical characteristics a fluid medium by transmitting ultrasonic vibrations to the under control through sound conducting and pipe wall at an angle α, acute or obtuse, exterior, said being determined relationship: α = arcsin Co /(√2·C) where: is velocity propagation in medium; C transverse material wall. Therewith, frequency f transmitted selected according (n · C)/(√2 d) n integer (such as 1, 2 3); d thickness Parameters vibrations, passed control, are then measured their value used determine parameter controlled. The herein proposed makes it possible increase accuracy medium.