A Microplate Reader is a laboratory instrument used to measure the optical properties of samples in microplates, typically 96, 384, or 1536 wells. It can detect various signals, such as fluorescence, absorbance, and luminescence, making it essential for applications in fields like biochemistry, molecular biology, and drug discovery. These devices allow researchers to analyze multiple samples simultaneously, increasing efficiency and throughput. Microplate Readers are commonly used in assays, such as enzyme-linked immunosorbent assays (ELISA) and cell viability tests, providing valuable data for experiments involving proteins, nucleic acids, and other biomolecules.