FIELD: measurement technology. SUBSTANCE: actuating unit of gear for determination of flow rate including Pitot pressure Px line and static pressure Po line is mounted on pipe-line to meter efficiency of main pipe-lines. Three base planes are set in measurement tube connecting Po and Px lines with the help of three ultrasonic converters. Probing pulse is formed in second plane and directed simultaneously along and counter to flow partially carried off to measurement tube. Results of reading by electron unit of sequence of standard pulses formed in time interval between moment of first reemission of probing pulse conducted at moment of its first registration in third base plane and moment of third registration of probing pulse in first base plane are used to evaluate momentary flow rate. EFFECT: enhanced accuracy of determination of flow rate. 2 cl, 3 dwg
