Abstract: A probe for sensing the moisture content in a porous medium such as soil. The probe includes an array of a multiplicity of conductors and resistors formed on a substrate, with contact pins or electrodes connected to one end of each resistor, typically extending outwardly from the substrate. The resistor array is preferably divided into at least two groups, providing a separate output for each group. An appropriate voltage source and indicator means are connected to the resistor array in a circuit to provide indication of soil moisture. The transfer characteristic of the apparatus is such that the probe has improved sensitivity in the area of primary interest, that is at, between 80 and 100% of saturation.