... /TDS Meter, etc.Application:This instrument based on the principle of photoelectric effect & D65 light source (R457) and with 0 ... samples, this instrument can be widely measured the whiteness value of any substances. Such as: powder, board, paper, paste, sheet, ... --- ---Size & Weight405X325X330mm & 6.5kg Digital Whiteness Meter (0-100%,LED display, touch panel, test paper, rice, flour, powder, paste)