This article presents the model and operation of a microcomputer system, Dobroudja, designed for measurement, processing, and recording of data by different electrical methods: resistivity, induced polarization, potential, gradient, etc. The system automatically commutates and moves various configurations which differ in size and type along the profile. The system has four modes of operation, each one with three modes of measuring the parameters studied which are automatically possible. The results of the measurements are processed and recorded in digital and graphic form. The article also presents data on electromechanical commutators intended for electrical profiling and sounding. Each commutator uses a definite number of electrodes grounded along the profile at an equal distance and makes configurations of different sizes. The described commutators are compatible with all existing and currently used resistivity meters.