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Flow metering systems for part filled pipes and channels are meanwhile available on the market for many decades. The most popular ones among these systems were the Venturi systems which, however, were pushed out of the market by electronic systems back in the eighties.
Starting in the early nineties, the Doppler systems dominating the market then were supported by magnetic-inductive units for partial filling launched by renowned manufacturers. Unfortunately, such metering systems equipped with electrodes revealed shortcomings once being operated in dirty areas or in the wastewater field. As a result, for some time now many manufacturers withdraw their EMFs for part filled applications from the market. This is one of the reasons why companies such as ABB have decided not to provide such systems any longer starting in 2018.
For many years now, NIVUS provide two different measurement methods operating without electrodes as modern alternatives to EMFs in part filled applications. In contrast to an EMF such systems are absolutely zero point stable, drift-free und and the measurement dynamics in terms of minimum filling level and flow velocity are significantly higher.
The cost-efficient, ultrasound-based Type OCM Doppler system has proven for many decades and covers the full range of measurement and control tasks of common applications.
Providing the ultrasonic cross correlation technology, NIVUS for a long time now offer another appropriate measurement method which meets the highest standards. It is the solution of choice for billing purposes or whenever the discharge of extraneous water needs to be determined. Our NivuFlow 750 instrument series utilises the latest scientific hydraulic models for the most accurate determination of flow rates possible and features quick and easy commissioning procedures.