There is a problem of low approximation of measuring complexes in aluminium industry, used for definition of metals and electrolyte levels on proceeding electrolyzers. Obligatory demands to portative measuring complex have been determined on the base of analysis and comparison of present methods. The measuring complex was developed, experienced and industrially implemented; it allows to improve essentially approximation and repeatability of measuring of metal and electrolyte levels on electrolyzers with self-baking anode.