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An ELISA instrument is a piece of lab equipment used to perform and analyze Enzyme-Linked Immunosorbent Assays (ELISAs), which detect and quantify specific biological molecules in a sample. The two main components are the ELISA plate reader and the ELISA plate washer. A plate reader measures the color change that occurs in each well of a microplate to determine the concentration of the target substance, while a plate washer automates the washing steps of the assay to ensure accuracy