Spraying is a process for coating surfaces with paints and varnishes. In general, the paint is atomized and applied with compressed air using a paint spray gun or paint nozzles. This method is often used but has the disadvantage that the loss of paint through the spray mist passing components is relatively high.

Electrostatic wet painting is a remedy. This is particularly useful for complicated applications, as coating takes place on all sides. Here, the charged paint droplets are applied on the workpiece under the influence of electrical transport and attraction forces. Main applications are ESTA paintings for highly conductive paints and coatings.

For this purpose, we offer a combination of our TRICOR Coriolis Mass Flow Meters with an optical RS485 signal converting devices for electrostatic applications. Using a Modbus protocol via fiber optical communication allows the transfer of measurements (actual mass/volume flow rate, process density and process temperature, totalizer) and meter diagnosis values to a PLC with transfer rates of up to 10 Hz.

This allows high-precision measurement of flow ranges from 3 up to 65,000 kg/h for system pressure ranges up to 345 bar. A further benefit over conventional measuring techniques is that the flow meter contains no moving parts and thus requires considerably less maintenance than mechanical meters. Due to its media-independent measuring principle, it offers the additional advantage that it can be used for water as well as solvent lacquers with and without fillers.