Bio-Rad Model 550 Microplate Reader

This used Bio-Rad Model 550 Microplate Reader is a well-established absorbance reader recognized for its durability and simplicity in laboratories running ELISA and other colorimetric microplate assays. It has been checked out for proper operation and is ready to return to service in a lab environment. The Model 550 uses interference filters to provide reliable single and dual wavelength readings across standard 96-well plates, supporting common applications such as immunoassays, enzyme kinetics, and protein determination. Its rugged construction and simple keypad operation make it an easy instrument to train new staff on, and it pairs with Microplate Manager software for streamlined data handling when connected to a PC. This reader is well suited to clinical labs, research facilities, and teaching institutions that need a dependable absorbance platform without the cost of newer multimode systems. As a used instrument it continues to be a popular choice among labs seeking proven performance and straightforward maintenance at an accessible price point.