Color-monitoring assembly for a roasting material, roaster assembly and method for roasting the roasting material

A color monitoring arrangement for a roasting product, the color monitoring arrangement comprising:

• a light sender comprising at least one light source, the light sender being configured to emit a light beam provided by one of the at least one light source to illuminate the roasting product;
• a light receiver;
• a light guide arrangement comprising a first light guide which is configured to forward the light beam, and a second light guide which is configured to forward a reflected light reflected by the roasting product to the light receiver;
• an optical device which is configured to apply the light beam to the roasting product and to apply the reflected light into the light guide arrangement;
• an evaluation unit which is controllably connected to the light guide arrangement for defining at least one color value for the roasting product, the at least one color value being determined by determining a quotient of respective reflection measurements of a light intensity of the light beam to a light intensity of the reflected light, for each of at least two light wavelengths;
• and
• a measuring probe comprising a first opening at a first end, a second opening at a second end, and a flush air connection which is configured to connect to a flush air armature, wherein,
• the first end is opposite to the second end, and
• the flush air connection is arranged between the first opening and the second opening on a radial outer portion of the measuring probe,
• wherein,
• the light guide arrangement is guided into the first opening at the first end into the measuring probe, and
• the optical device is arranged at the second opening at the second end of the measuring probe.