Sliver cross-section measuring device

Ribbon cross section measuring device (1; 11) on or for a drafting device (4) having spinning machine, in particular a carding or drafting, with a sensor (20; 220, 230), whose output signals are a measure for the band cross section (at least one fiber band FB, FB ' ) constitute, characterized by a compensation device (40; 41) for correcting the output signals of the sensor (20; 220, 230), which due to temperature, the output signals of the sensor (20; influencing 220) extensions of components of the tape cross-section measuring device (1; 11) is compensated ,