Conductivity Machine

The electronic properties of a system can be defined in terms of its ability to store and transfer charge (i.e. its capacitance and conductance). The use of electrochemical impedance spectroscopy (EIS) records the response of the system to a small applied perturbation (i.e. AC signal), over a pre-determined frequency range. The applied AC voltage and the resultant AC current are measured and the impedance calculated (Z* = V / I). The technique is non-destructive and is particularly sensitive to small changes in the system.