... can measure the whiteness of flour, starch and rice flour to attain the goal of controlling ... Main Products: Atomic Absorption Spectrometer (AAS), Fluorescence Spectrophotometer, Bio-Spectrophotometer, UV Vis Spectrophotometer, Visible Spectrophotometer, Flame Photometer, Whiteness Meter, Turbidity Meter, Colorimeter, ... of photoelectric effect & D65 light source (R457) and with 0/d or d/0 as a ...