Electromagnetic flowmeters KROHNE featuring virtual reference

Electromagnetic flowmeters featuring virtual reference offer an innovative grounding method that allows the flow sensor to be installed in any pipe, without grounding rings or grounding electrodes .

✨What are the benefits? ✨
Virtual reference is an innovative grounding method that allows the flow sensor to be installed in any pipe, without grounding rings or grounding electrodes. This saves the cost of grounding rings, especially with large pipe sizes, simplifies installation and helps operators to reduce systematic failures as faulty grounding is the most common cause of error when commissioning an electromagnetic flowmeter.

✨Want to save costs and installation efforts for the meters also in custody transfer applications? ✨
This is now possible with these devices from the OPTIFLUX series: OPTIFLUX 1300 | OPTIFLUX 2300 | OPTIFLUX 4300 | OPTIFLUX 5300 | OPTIFLUX 6300
 

In certain applications, the conventional grounding methods of EMFs pose problems, e.g. in lines with cathodic corrosion protection or in galvanisation plants voltage is also present between the electrodes and the earth. When using aggressive media in the application, the grounding rings for conventional grounding must usually be manufactured from expensive special material (Tantalum, Titanium, Nickel, etc.) which amounts to extremely high costs when dealing with large pipe sizes.

With the virtual reference, the EMF sensor can be installed in any type of pipeline without grounding rings or electrodes. The converter's input amplifier records the potentials of the measuring electrodes and a sophisticated method is used to create a voltage which corresponds to the potential of the ungrounded liquid. This voltage is used as the reference potential for signal processing. Thus, there are no interfering potential differences between the reference potential and the voltage on the measurement electrodes.

            Virtual grounding is very cost-effective when using EMFs with larger diameters

The elimination of grounding rings and the simpler installation of the EMFs results in lower costs and help operators reduce systematic failures as faulty grounding is the most common cause of error when commissioning an EMF. There is no risk of electrolytic destruction when there are potential differences in the system. No stray currents flow over the product or grounding lines.