Wide wavelength range, satisfying requirement of various fields. Fully automated design, realizing the simplest measurement & satisfying the requirement of pharmacopoeia, Maximum of 9 wavelengths & 7 samples can be measured at one time. Automatic change-over between W lamp & D2 lamp, optimized optics and large scale integrated circuits design, light source and receiver, Automatic 10mm 8-cell holder, RS-232 interface.