Excess body fat, or obesity often cause significant harm to health. The development of a mechanism for evaluation of body fat more dynamic expedite the process of measurement. The goal of this work is the creation of a clinical analysis equipment capable of determining the percentage of fat in patients so rapidly, accurately, without the need for calibration after installation. A mechanical system has been developed by us in order to achieve acquire data over the whole human body. We conducted case study of a single evaluation a result compatible with the visual inspection performed by experts.