The DU Series 600 is a microprocessor controlled spectrophotometer intended for use in quantitative and qualitative biological research and industrial procedures that require spectrophotomic measurements in the UV-visible region of the electromagnetic spectrum. The DU Series 600 operates in the wavelength range of 190 to 1100 nm. The Beckman Coulter DU-640 is a UV-VIS spectrophotometer with wavelength range of 190 - 1100 nm. You can find plenty of surplus and used DU-640’s available for sale on LabX. View the ads below!