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High-speed (usually up to 28,000 rpm) tabletop centrifuges designed to separate small sample volumes, typically from 0.25 to 2.2 mL. These centrifuges are typically compact, stationary structures and consist of an electric motor, a shaft, and speed and time controls; they also include a rotor on which one fixed head is mounted. Most high-speed models have refrigerating capabilities; they include a compressor and other associated devices needed to keep the rotor chamber cool and/or to facilitate performance of temperature-sensitive procedures. Microsample high-speed tabletop centrifuges are used to collect microorganisms, cells, and precipitates from small samples (e.g., pediatric patient samples); they can also sediment viruses and cellular organelles.
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