Bio-Rad Model 550

This pre-owned Bio-Rad Model 550 microplate reader is a proven workhorse for absorbance-based assays and remains a popular choice on the resale market due to its simplicity and durability. It reads standard 96-well microplates and offers multiple wavelength filters for a variety of ELISA and colorimetric assay protocols. The unit has been inspected and is functioning properly for continued laboratory service. Designed with ease of use in mind, the Model 550 features a straightforward interface that allows technicians to quickly set up and run assays without extensive training. Its filter-based optical system provides consistent and repeatable readings, and the reader is compatible with Bio-Rad Microplate Manager software for data analysis and reporting. This makes it a practical option for laboratories that need dependable performance without the complexity of high end instrumentation. Laboratories running routine immunoassays, protein assays, or general colorimetric testing will find this reader to be a solid addition to their equipment lineup. Its compact footprint and reliable performance make it ideal for teaching labs, small clinical laboratories, and research facilities operating on a budget.