Transient Method of Measuring Very Low Conductivities without Contacting Electrodes
Daniel Chatain, P. Gautier, C. Lacabanne · Review of Scientific Instruments · 1970
An experimental procedure is proposed, which amounts to Fourier transforming the frequency depending torque in the Ogawa's torsion pendulum method. This reduces by a factor of the order 100 the fairly long times needed for measuring the very low conductivities of insulating materials.