The large Large High-Speed Centrifuge is controlled by a microprocessor and has a maximum capacity of 4 x 1000 ml. The unit is fitted with 2 vertical rotors, 2 swing our rotors and 14 angle rotors and the overall speed ranges from 500- 22,000 rpm in indicated in increments of 100 rpm. The timer of the Large High-Speed Centrifuge displays readings in 1 and 180 minute increments and there is a HOLD feature for longer runs. Other features of this refrigerated Large High-Speed Centrifuge include a brushless induction drive, 8 deceleration and acceleration ramps, maintenance free, stainless steel chamber, large color display, motorized lid locking system, automatic lid opening and emergency lid lock release system and over speed detection.