The document describes the Proline Promag W 400 electromagnetic flow measuring system, which offers precise bidirectional measurement of liquids in water and wastewater applications with a minimum conductivity of 3-5 ms/cm. It is immune to pressure and temperature influences, with features such as a durable transmitter housing, a graphical display, and multiple communication outputs. Additionally, it promotes efficient installation, commissioning, and operation, designed specifically for demanding water and wastewater management tasks.