Ultrahelimeetodid kasutavad lühikese lainepikkusega ja kõrgsageduslikke mehaanilisi laineid (vibratsioone), mis suunatakse vedelikuvoogu ja selle abil mõõdetakse voomahtu.
Ultrasonic methods use short-wavelength, high-frequency mechanical waves (vibrations) that are directed into the fluid flow and used to measure the flow-rate.
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