A microcentrifuge is a small laboratory device used to spin samples at high speeds, creating a strong centrifugal force. This force separates components in a liquid, such as cells, proteins, or nucleic acids, by density. Microcentrifuges typically hold small tubes, often ranging from 0.2 to 2.0 milliliters in volume. These devices are essential in molecular biology and biochemistry for tasks like DNA extraction and sample preparation. They are compact and easy to use, making them a staple in many research and clinical laboratories. Microcentrifuges can also be found in educational settings for teaching purposes.