Promag W has a “0 x DN full bore” option for a close-knit pipeline network or obstacles in pipes. The mag meter provides maximum measuring performance without tube restriction, and thus without pressure loss, according to the manufacturer. The Promag W 300/400/500 flowmeters in the line are suitable for installation in tight spaces such as compact systems or skids because they do not need any inlet or outlet runs. The Promag W (0 x DN full bore) can handle swirls that frequently occur downstream of obstacles such as pipe bends and insertion devices, and even those downstream of unknown obstacles such as buildup on the pipe wall, protruding seals or different inside diameters. Multiple measuring electrodes detect flow. Together with the refined signal analysis, reliable measurement results are realized in swirl conditions.