Abstract
We applied the theory of a psychrometer to develop a humidity monitoring system by using porous ceramics as a sensing element. The effects of porosities and pore size distributions on water transfer were investigated theoretically and experimentally. Several types of cylindrical porous ceramics were used. In addition, we compared the moisture transfer coefficients / permeability coefficients. The results showed that capillary water transfer were higher in the conditions that porosity was laeger and pore size distribution was wider. The water transfer by pressure difference were higher in the conditions that mode diameter was laeger.
