Patent ID: 7627959

Claim:
An improved dryer for the removal of moisture or solvents from a product, comprising a rotating drying compartment consisting of a centrifugal drum, said improvement consisting of at least one window ( 3 ) and wherein the centrifugal drum is closeable by a restrictor plate ( 2 ) axially displaceable for opening and closing the drying compartment, in operable relationship with an NIR probe ( 4 ) for carrying out a moisture measurement of the product contained in the closed drying compartment, the NIR probe ( 4 ) located less than 2 mm outside the drying compartment held by a fitting ( 5 ) connected to a housing surrounding the restrictor plate ( 2 ), the fitting ( 5 ) comprising means for the axial displacement of the NIR probe ( 4 ) and further comprising an optical system oriented toward the product through the at least one window ( 3 ) and a means for flushing itself and the at least one window with a gas.