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Title: Ultrasonic Meters For Liquid Measurement Characteristics Of Doppler And Transit-Time Ultrasonic Liquid Flow Meters
Author: Steve Yon
Source: 2006 International School of Hydrocarbon Measurement
Year Published: 2006
Abstract: This paper is a review of the state-of the-art, design and operational performance characteristics of Doppler and transit-time ultrasonic (UFM) liquid flow meters. Ultrasonic meters of various types have been used in our industry for over 20+ years. There are generally two different types of meter technology, transit-time and Doppler. Doppler was the first technology and was considered to be an alternative to conventional flow measurement. You could just ?stick it on the outside of the pipe and measure ? like magic. Their ?performance? however, in the end proved questionable. Accordingly, for many years the ?Doppler? and ultrasonic names did not enjoy the privilege of being considered an accurate measurement device. The continuing enhancements of Doppler technology and the development of transit time technology have dramatically changed the ability UFMs to measure accurately. Beginning in the mid 1980s transit time technology emerged and has been applied with very successful results. In January, 2005 API approved and published the first edition of Chapter 5.8 ?Manual of Petroleum Measurement Standards for Measurement of Liquid Hydrocarbons by Ultrasonic Flow Meters Using Transit Time Technology. This has officially cleared the way for Custody Transfer Ultrasonic Measurement.

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