An ultrasonic flow meter is a volumetric flow meter that requires bubbles or particulates in a flow. These flow meters are ideal for wastewater applications or dirty liquid which is water or even applications that require a non-evasive solution. Ultrasonic flow meters commonly do not work with gas applications.
In order to remove gas from the liquid application, it is necessary to use aerations. Ultrasonic flow meters are good for applications in which low maintenance, chemical compatibility and low pressure drop are required.
Principle of Operation
The main principle of operation uses the frequency shift of an ultrasonic signal while it is reflected by liquid velocity or suspended particles in a motion. This technique of metering utilizes the physical phenomenon of a sound wave that varies frequently during it’s reflection by moving discontinuities in a flowing liquid.
The ultrasonic sound is normally transmitted into a hose pipe with flowing liquids, and discontinuities reflect the ultrasonic wave commonly with a unique frequency directly proportional to flow rate of the liquid. Latest technology needs that the liquid hold at least 100 parts per million of 100 microns suspended bubbles or particles.
Portable Ultrasonic Flow Meter
There are various portable ultrasonic flow meters available in the market providing advanced features with accurate flow velocity assessments. The assessments are commonly done in closed piping systems. Most of the portable ultrasonic flow meters are in FD610 series.
The FD610 Series employs a non-invasive clamp-on transducer placed outside of a hose pipe. Within a few seconds, the large 18 mm (0.7") LCD gives a stable flow rate indicating in meters per second or feet per second. This operates on plastic or metal containing liquids with over 100 PPM of 100 Micron.
ProFlow Dynamic, LLC Supplier of Flow Meters
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