The Sorvall RC-3B is an improved version of the venerable RC-3. A
balanced motor ensures quiet running operation with a full speed range, and promotes long life for brushes and bearings. The gyro-action drive so popular in the RC-3 was improved by adding a square spindle drive shaft which locks the rotor in place and allows the rotor lid to be easily removed.
The RC-3B utilizes the following safety features;"automatic shut-off of the centrifuge motor for "over-speed" protection and for the refrigeration motor to prevent damage from
overheating;"electrical circuit breaker on the main power and control panel circuit; operating controls which may be changed, intentionally or accidentally, without causing harm to the centrifuge;
"a door interlock which prevents opening the chamber door while the rotor is in motion and/or starting the rotor drive while the door is open.