5180R Refrigerated Centrifuge, Eppendorf, New York, USA
Sorvall Evolution RC Super Speed Centrifuge, Thermo, USA
Superspin R V/FM, Refrigerated Centrifuge, Plastocraft, India
RM12C and RM24C Centrifuges, Remi India

A centrifuge is a device driven by an electric motor for separating particles like cells, sub cellular components, proteins from a solution according to their size, shape, density, viscosity of the medium and rotor speed. The methodology involved is the density difference between the particles and the medium in which they are suspended. In 1864, Antonin Prandtl invented the dairy centrifuge to separate cream from milk. Later in 1879, Gustaf de Laval demonstrated the first continuous centrifugal separator. We use the centrifuges very often for DNA, RNA and proteins isolations, competent cell preparation, plasmid DNA purification etc.
Bench Top Centrifuge

There are different types of centrifuge available based on the maximum speed of sedimentation, presence or absence of vacuum, temperature control, volume of sample, capacity of centrifugation tubes, type or rotor etc., Centrifuge can be used for centrifuging the sample in tubes of volumes ranging from 0.5ml to 1000 ml, 96 well plates and glass slides.
  The rotors may be fixed angle rotor, or swinging bucket rotor. Fixed angle rotor is the most commonly used one and it has shorter run time. The rotor speed can be in rpm, rcf, or gravitational force. We have centrifuges which can run at a speed of 26,000 revolutions per minute.