The document details the Proline Promag L 400 electromagnetic flow measuring system, designed for economical bidirectional measurement of liquids with a minimum conductivity of 3.5 mS/cm, suitable for water and wastewater applications. It features robust specifications including a range of nominal diameters, various liner materials with drinking water approvals, and capabilities like simultaneous flow and conductivity measurement, with simple installation and commissioning processes. The device is characterized by its pressure and temperature immune measuring principle, making it reliable and efficient in various operational environments.