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PopisUp to now, doppler ultrasonic flowmeters have required significant quantities of suspended particles or gas bubbles to reflect sound signals. Now, with the model FD-7000 ultrasonic flowmeter, this is no longer required. When the FD-7000 is used to measure the flow of liquids containing suspended solids or bubbles, the transducers are mounted on a straight run of pipe in the same manner as other ultrasonic meters. In applications where insufficient "reflectors" exist (a condition indicated by a low reading on the FD-7000°s flow analyzer bar graph), the transducers are relocated to a point in the piping where non-symmetrical hydraulic turbulence will be present.ideally just downstream of a 90° elbow. The FD-7000's unique digital filtering system and signal recognition circuitry transforms the reflections from this non-symmetrical, and not necessarily linear, turbulence into a useable and linear data format.