A centrifuge is a device used for separating particles from a solution according to density. The centrifuge spins the samples around an axis in order to produce centrifugal force, thus increasing the magnitude of the gravitational field. The radial force generated by the spinning rotor is expressed relative to the earth's gravitational force and is therefore known as relative centrifugal force (RCF), or the g force.

Rotors from different manufacturers can have different standards; therefore, it is better to use relative centrifugal force (RCF) to measure the centrifugation force, instead of revolutions per minute (rpm).

A machine that sits on a workbench or table. Inside the machine, there are slots that can hold test tubes. The slots are evenly spaced in a circle around a central point, where the rotation occurs.

It is important to ensure that loads are evenly balanced before running the centrifuge.