... SpecificationsWhiteness meter except solution or liquid samples, others all can test, such as: powder, board, paper, paste, sheet, clay,etc ... principle of photoelectric effect & D65 light source (R457) and with 0/d or d/0 as a illumination condition. Meanwhile ... --- ---Size & Weight405X325X330mm & 6.5kg Digital Whiteness Meter (0-100%,LED display, touch panel, test paper, rice, flour, powder, paste)