Application Cautions for Doppler Ultrasonic Flow Meters
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Ultrasonic Flow Meters Application Cautions for Doppler Ultrasonic Flow Meters For Doppler ultrasonic flow meters, be sure that the fluid adequately reflects ultrasonic waves, because the flow meter will not operate without a reflected ultrasonic signal. Depending upon design, reflections can occur due to small bubbles of gas in the flow stream or the presence of eddies in the flow stream. If not already present in the flowing stream, generating these sources of reflection can be difficult in practice. Fortunately, some combination of bubbles of gas and/or eddies are present in most applications. |