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Title: Ultrasonic Gas Flowmeter, Gf Series
Author: Yoshiki Ito, Yasuhiro Kobori
Source: 1986 International Symposium on Fluid Flow Measurement
Year Published: 1986
Abstract: An ultrasonic gas flowmeter has been developed which provides the average velocity or the volume flow rate of gas flowing in a pipeline. The average velocity calculated from the difference of reciprocal transit times between a pair of acoustic probes allows no dependence on sound velocity in a gas as well as gas composition, pressure and temperature. The volume flow rates measured by an ultrasonic flowmeter have shown good agreement with those by a differential type one in the rates above 10 percent of flow range and better results in lower flow rates. The outlines and performance are presented in this paper.

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