The Voltage Effect on Electrical Parameters of the Skin - ECG Electrodes Interface -

We measure nonlinear electrical properties of the skin-electrodes interface (i.e. voltage dependent bioimpedance), with voltages less than 2V for a sharper discrimination of the physical processes shaping skin-electrode electrical behavior as a main factor for designing new devices. A rectangular signal is applied through usual ECG electrodes on epithelial tissue with voltages starting from 0.2 V and a frequency of 500 Hz. The purpose is to determine the optimum value of electrical voltages in order to determine the electrical parameters of the tissue: parallel resistance (Rp), series resistance (Rs) and parallel capacity (Cp).