Patent ID: 6507200
Filing Date: 2003-01-14
Classification: G01N

Abstract:
A moisture sensor for sensing the moisture in layers, said moisture sensor including a conductor arrangement comprising two parallel electrical cables, a measuring apparatus for determining dielectric coefficients connected to said conductor arrangement, each cable including two spaced conductors connected in a three-conductor circuit, in which the conductors of said two cables disposed adjacent each other are at the same potential the space between the two inner conductors of said cables being selected so as to provide for a certain impedance of said conductor arrangement, said electrical conductors of each cable being surrounded by an insulating material layer of a predetermined thickness and carrying at one side, which is remote from the layer whose dielectric coefficient is to be measured, a metal shielding layer, the space between said inner conductors, the thickness of the insulating material and said metal shielding layer determining the measurement field of the moisture sensor in the layer in which the moisture is to be sensed.