Patent ID: 8410796

Claim:
A calibrating device for use with an apparatus ( 2 ) effective for determining the moisture content of products, including wood, the apparatus ( 2 ) having a transmitting antenna and a second receiving antenna which are electrically connected to each other and a measuring zone which is located between the transmitting antenna and the second receiving antenna and wherein a product whose moisture content is to be determined can be positioned between the transmitting antenna and the second receiving antenna, the calibrating device comprising: a first receiving antenna ( 3 ) which is shaped so that it can be inserted in and removed from the measuring zone of the apparatus ( 2 ) to be calibrated; an electric terminal ( 4 ) which is configured so that, in operation, it can be electrically connected to the apparatus ( 2 ) or to another item; and an adjustable impedance ( 5 ), electrically connected, via one or more electric conductors, between the first antenna ( 3 ) and the electric terminal ( 4 ), the impedance ( 5 ) being adjustable such that the calibrating device can effectively simulate the dielectric properties of a plurality of products having different moisture contents when the calibrating device is inserted in the measuring zone of the apparatus.