Centrifuges make use of the centrifugal force that acts on mixtures during rotational movement to separate the constituents. A pre-requirement here is a sufficient difference in density between those constituents. Laboratory centrifuges are sedimentation centrifuges and may take the form of benchtop or floor-standing models. They are used in many fields, such as chemistry, physics, pharmacy, biology, biotechnology and, not least, medicine. Their power is needed in industry for production purposes, in research facilities for scientific applications and in medical laboratories for investigation purposes or to derive blood constituents.