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Title: Fundamentals Of Multipath Ultrasonic Flow Meters For Gas Measurement
Author: Martin Schlebach
Source: 2015 American School of Gas Measurement Technology
Year Published: 2015
Abstract: Ultrasonic meters have been used in gas custody transfer measurement worldwide for over 25 years with varying degrees of success. Initial atte mpts proved unstable and maintenance intensive, this was contrary to the initial expectations which foresaw a device with little or no obstruction, limitless turndown and little to no required maintenance. The advent of higher speed, more robust electronics enabled the use of digital signal processing which eliminated the need for analog threshold levels and the constant problem of peak skipping and lost timing. The improved electronics also enabled the implementation of large internal logs, advanced diagnostics, improved communications and overall stability, all of which increased user confidence in the ultrasonic technology

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