Optic system adopts new type of interface filters which is featured by heat-resistant, moist-resistant, longevity of service, little center wavelength excursion, high optical signal-noise ratio etc. The main control system adopts industrial ARM and new type of high precision £-AD transfer, with high measurement precision and reliable. English operation interface, real-time reaction curve display and enlarge. Barcode reader connection is available and the flip open shell is more convenientor maintenance.