Bürkert presents a new SAW-based flowmeter

The FLOWave flowmeter

The FLOWave flowmeter


FLOWave is a compact flowmeter for use in liquid media, consisting in an initial version of a transmitter with or without a display and a sensor with clamp process connections. The underlying Surface Acoustic Wave technology uses wave propagation for the measurement, similar to that in seismic activities. A major advantage of the patented technology is that there are absolutely no components inside the measurement tube, so the liquid is only in contact with the stainless steel tube. The inside of the tube can be manufactured with the same surface quality as the rest of the piping and is identical to any other straight pipe section with respect to hygiene, cleaning and flow conditions, this lets this system to be used for pharmaceutical, food, beverage and cosmetic applications. There is no pressure drop and no effects of fluids on sensor elements, nor can the medium be impaired by the latter. Standards for tube and process connections in material and size are observed. The sensor selection is easy as this is mainly limited to the size of the tube and the required type of process connection. The device requires no maintenance.
The measuring device can be operated without restrictions when installed in horizontal and vertical position and also works with non-flowing liquids, so that measurements are available even in the case of minimal flow rates. Disruptions from plant vibrations are not possible. Nor do magnetic and electric forces affect the measurement. Independence from the conductivity of the liquid significantly expands the areas of application.
The company stated that, in addition to the measurement of flow rate and temperature, the next step will be to expand FLOWave to measure additional parameter such as density and mass flow rate, which will then make it one of the few devices in the world that are even capable of such a broad spectrum of functions.