... Main Products: Atomic Absorption Spectrometer (AAS), Fluorescence Spectrophotometer, Bio-Spectrophotometer, UV Vis Spectrophotometer, Visible Spectrophotometer, Flame Photometer, Whiteness Meter, Turbidity Meter ... and scratches, free for clean and durable;² High brightness LED lights, with long service life;² Extremely large storage capacity can ... ;1.3000-1.7000nD; External USB and RS232;LED lights;)