A mini centrifuge is a laboratory instrument used for spinning small volumes of samples at high speeds to separate components based on their density. It typically consists of a motor, rotor, and control system enclosed in a compact casing. Mini centrifuges are commonly used in molecular biology, biochemistry, microbiology, and other fields for tasks such as DNA/RNA extraction, protein purification, cell separation, and quick spin-downs of samples in microcentrifuge tubes.