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ULTRASONIC FLOWMETERS THAT ARE INSENSITIVE TO SUSPENDED SOLIDS
Citation:
Averett, W. ULTRASONIC FLOWMETERS THAT ARE INSENSITIVE TO SUSPENDED SOLIDS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-90/225 (NTIS PB91162404), 1990.
Description:
This report describes the results of an investigation of the performance of state-of-the-art and standard portable ultrasonic Doppler flowmeters that do not require particles or bubbles in the fluid to make an accurate measurement. oth the standard and new state-of-the-art flowmeters measured flow within their claimed accuracy in tap water without any particles or bubbles added. ll testing was performed at the U.S. Environmental Protection Agency (USEPA) Test and Evaluation Facility in Cincinnati, Ohio. ll testing conformed to Scientific Apparatus Makers Association (SAMA) standards. he test results from both flowmeters are presented so that an easy comparison may be made and that the improvement in performance can be determined. he velocity range of all testing was from 0 - 21.58 ft/sec. he state-of-the-art ultrasonic flowmeter was superior in measuring lower values of flow and performed about the same as the control flowmeter over the upper range of the velocities tested. owever, these advancements in ultrasonic technology do not abrogate the normal loss of accuracy above 16.25 ft/sec in tap water. his loss seems to be a function of Reynolds Number. oth flowmeters performed within their accuracy specification over a range of 0 - 16.25 ft/sec.
