In choosing a tabletop centrifuge enabling to perform stable centrifugal operation, the 5420 is the best choice. It is not neccessory for the 5420 to take care of a carbon brush because this model ecuipped with brush-less motor. Further more, the 5420 is controlled by a micro-processor to achieve a stable centrifugal performance.

If it is necessary to interchange rotors frequently, the 5420 model is a suitable choice. Accepting a tool-less rotor, the 5420 is a time saving unit which cut down on experiment time. With the tool-less rotor, a standard hexagonal wrench key is not required, because the rotor features a special hand-fastener bolt on its top. This makes changing the rotors easy and simple.
      
In choosing a tabletop centrifuge that accepts a variety of test tube sizes, the 5420 is the ideal choice. The 5420 permits spinning from 80 x 2mL to 4 x 250mL with the ST-720M swinging bucket rotor. In addition, the 5420 and the ST-410M swinging bucket rotor accepts sealing caps, permitting biohazard-proof usage.