In choosing a refrigerated centrifuge that accepts a variety of test tube sizes, the 5911 is the best choice. The 5911 permits spinning from 80 x 2 mL to 4 x 250 mL with the ST-720M swinging bucket rotor. In addition, the ST-410M swinging bucket rotor accepts sealing caps, permitting biohazard-proof usage.

In choosing a refrigerated centrifuge that is able to meet general-purpose applications requiring cooling, the 5911 is ideal. By exploiting its cooling capability, the 5911 can handle samples that are easily deactivated at normal temperature, thus saving valuable samples. Under the condition of ambient temperature of 25 °C, the 5911 can maintain samples at temperatures as low as 4 °C with a wide variety of rotors at maximum spinning.

If it is necessary to interchange rotors frequently, the 5911 model is a suitable choice. Accepting a tool-less rotor, the 5911 is a time saving unit which cuts 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.