DRK908H yarn evenness light source box (blackboard method) is used to evaluate the evenness of yarn evenness and the total number of neps. Standards compliant: GB/T9996.2 and other standards. Features: 1. The sample table is processed with imported special profiles, the material is light and the surface is smooth; 2. The reflector inside the instrument is processed by electrostatic spraying; 3. Easy to install and replace the lamp; technical parameter: 1. Light source: white fluorescent tube, 40w, illuminance 400lx (2 tubes); 2. The illumination angle of the light source: 21.2°; 3. Blackboard size: 250mm×220mm×2mm; 4. Grading table: 2 stations; 5. Power supply: AC220V, 50Hz, 80W; 6. Weight: 10kg;