Abstract: A means and method for determination of the pore structure of porous materials using electrical conductance. A sample of porous material is saturated with electrolytic solution and positioned into a container. Temperature and conductance of the sample are monitored as temperature is varied. The temperature is varied so as to create phase transitions in at least a portion of the electrolytic solution existing in the sample. The control means can be utilized to control the sequence of temperature changes and to receive and record the temperature and conductance readings. Alternative means for accomplishing the method of the invention are disclosed, including a specific means for positioning a sample, attaching electrodes to its opposite sides, and attaching a temperature sensing device to the sample, and at the same time isolating and insulating all electrical connections.