Measuring device for measuring the humidity of materials, particularly textiles

A measuring device for measuring the humidity of materials, particularly textiles, comprising an evaluation circuit EC having electrical terminals (8, 9) connectable to an electric load, and an oscillatory circuit (5), and comprising:

• a primary electrical circuit (1) comprising a first ferromagnetic element (3) having a first electric coil (4) wrapped around, said first coil being electrically powered by said oscillatory circuit (5);
• a secondary electrical circuit (2) comprising a second ferromagnetic element (6), contactlessly facing the first ferromagnetic element, having a second electric coil (7) wrapped around, said second coil (7) being in electrical communication with said evaluation circuit EC, at least one of said first and second ferromagnetic elements (3, 6) being rotatable with respect to the other;
• switching means (10), provided in said evaluation circuit EC, for intermittently short-circuiting the second coil (7) a number of times dependent on the electrical resistance of the electric load connected to the electrical terminals (8, 9);
• output means (11) for outputting signals in response to the short-circuiting frequency of the switching means (10).