Low Stray Light The stray light of UV-580PC is below 0.05%T. The monochomator is totally sealed and the optical surfaces are protected with a silicon dioxide membrane. The excellent optical system and electric circuit design ensures the very low stray light.     Can Upgrade To Scanning Modle The instrument can be controlled by Wensar scanning software UV-Professional developed based on Windows® through the USB port. The software expands the function to Quantitative, Kinetics,Multiwavelength and Wavelength Scanning.