... Abbe Refractometer, PH/DDS/TDS Meter, etc.Application:This instrument based on the principle of photoelectric effect & D65 light ... condition. Meanwhile, except solution or liquid samples, this instrument can be widely measured the whiteness value of any substances ... ---Size & Weight405X325X330mm & 6.5kg Digital Whiteness Meter (0-100%,LED display, touch panel, test paper, rice, flour, powder, paste)