Clamp-on ultrasonic flow meters are the ideal solution in cases where the flow cannot be interrupted.
Unfortunately, ductile iron tends to attenuate the sonic energy. If such pipes are furthermore lined with cement, the attenuation becomes even stronger, thus presenting a considerable problem.
Recently, a dual channel Fluxus ADM 7407 was successfully installed in a waste water treatment plant in New Jersey, where the facility operator needed to measure the influent and effluent of the primary treatment portion of the plant.
Due to its high output voltage, Fluxus succeeded. After a series of tests, Fluxus meters were permanently installed on both lines.
The Fluxus ADM 7407 ultrasonic flowmeters are available from AMS Instrumentation & Calibration .