A microcentrifuge is a small laboratory device used to spin samples at high speeds. It helps separate substances based on their density, making it useful for tasks like isolating DNA, RNA, or proteins. Microcentrifuges typically hold small tubes, often called microtubes, which can contain volumes ranging from 0.2 to 2 milliliters. These devices are essential in many scientific fields, including molecular biology, biochemistry, and clinical diagnostics. By creating a strong centrifugal force, microcentrifuges allow researchers to quickly and efficiently separate components in a mixture, facilitating various experiments and analyses.