Beckman Coulter DU 640B

This Beckman Coulter DU 640B is a used UV-Visible spectrophotometer from the popular DU 640 family, a series widely adopted across research, clinical, and industrial laboratories for its analytical precision and flexible feature set. The instrument has been previously operated and is offered here in tested working condition, giving buyers a chance to acquire a capable optical measurement system at an attractive price point. It features a scanning capability that allows users to examine absorbance across a range of wavelengths rather than at a single fixed point. The DU 640B is commonly used for nucleic acid and protein quantification, kinetics assays, and multi-component analysis, and its onboard software allows for customizable methods that can be stored and recalled for routine testing. Its larger sample compartment and accessory options made it a flexible platform in its day, supporting cuvette holders, sippers, and other accessories that extend its usefulness across different types of laboratory work. Many labs valued the DU 640B for bridging the gap between simple single-wavelength photometers and full-featured scanning spectrophotometers. Buyers looking for a versatile, proven spectrophotometer will find this used DU 640B a solid addition to a molecular biology, chemistry, or quality control lab. It offers a good balance of capability and affordability for facilities that need scanning functionality without investing in a brand-new high-end system.