Microprocessor-Controlled High-Speed Centrifuge with Swing-Bucket Rotor

What is the Microprocessor-Controlled High-Speed Centrifuge with Swing-Bucket Rotor?

This high-speed centrifuge pairs a microprocessor controller with swing-bucket rotors running to about 10,000 to 15,000 rpm for gradient work and gentle separation of large volumes. It suits blood fractionation, cell isolation and large-tube gradient preparation requiring flat pellets and low shear.

Overview

Swing-bucket operation gives tubes a horizontal orientation during the spin, which produces a flat pellet interface and preserves density gradients. On this variant the drive is tuned for torque at lower speeds, with swing-bucket rotors carrying 4 x 250 mL bottles or 6 x 50 mL conical tubes at up to 10,000 to 15,000 rpm and 15,000 to 20,000 x g. The microprocessor controls 10 or more acceleration and deceleration profiles, including coast-to-stop modes that avoid disrupting gradients. Refrigeration down to -10 C and a rotor temperature sensor maintain sample integrity. Buckets can be fitted with aerosol-tight caps, and adapters accept a variety of tube sizes. The trade-off is lower maximum RCF than fixed-angle rotors but superior gradient resolution and easier pellet recovery.

How does it work?

High-speed centrifuges use a high-torque induction or brushless drive, typically with a flexible shaft or direct coupling, to spin rotors made of aluminum alloy, titanium or carbon fiber. Centrifugal force scales with the square of angular velocity, so a 20,000 rpm rotor of 10 cm radius produces about 44,800 x g. Fixed-angle rotors shorten the sedimentation path and give fast pellets. Swing-bucket rotors allow gentle separation and gradients at lower speeds. Because friction with air heats the rotor significantly at these speeds, most units are refrigerated, with compressors holding 4 C and sensors monitoring rotor temperature. Armored chambers, rotor recognition, overspeed and imbalance protection, and lid interlocks contain energy in the event of a rotor failure.

What are the key features?

• Swing-bucket rotor carries 4 x 250 mL bottles or 6 x 50 mL tubes
• Coast-to-stop and slow-brake profiles preserve density gradients
• Refrigeration to -10 C with rotor temperature sensing
• Aerosol-tight bucket caps contain infectious material during spin
• Adapters accommodate tubes from 5 mL to 250 mL

What are the technical specifications?

A typical microprocessor-controlled high-speed centrifuge with swing-bucket rotor configuration offers maximum speed of 10,000–15,000 rpm, maximum RCF of 15,000–20,000 x g, rotor type of Swing-bucket, maximum capacity of 4 x 250 mL or 6 x 50 mL, temperature range of -10 to 40 °C and acceleration/braking profiles of 10 or more, including coast. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Microprocessor-Controlled High-Speed Centrifuge with Swing-Bucket Rotor is used in density-gradient separations, blood and cell fractionation, large-tube pelleting with flat pellet and virus concentrate preparation at moderate speed. Across the wider High-Speed Centrifuges class, laboratories also deploy it for bacterial and yeast cell harvest, protein precipitate recovery and organelle and membrane fractionation.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-020, IEC 61326-1, ISO 9001, ISO 3734 and GB 4793.1. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Floor-standing units weigh 150 to 400 kg and require a level, reinforced floor and dedicated power, often 220 V single phase at 16 A. Rotor care is critical: log run hours, derate aluminum rotors per the maker's schedule, and never exceed rated speed with lightly filled tubes that are not rated for the RCF. Clean with neutral pH detergents, lubricate threads and O-rings, and inspect for corrosion. Schedule annual preventive maintenance including tachometer and temperature verification. Comply with IEC 61010-2-020 and, for regulated work, document IQ/OQ and calibration records.

How do I select the right Microprocessor-Controlled High-Speed Centrifuge with Swing-Bucket Rotor?

Select the swing-bucket variant for gradients, plate handling or protocols demanding easy pellet resuspension. It cannot match fixed-angle RCF, so pick fixed-angle when maximum speed or rapid pelleting is the priority. In the RFQ, specify tube sizes, bucket capacity, adapters, RCF, braking profiles, cooling range and aerosol-tight lid requirements.

How does it compare with other High-Speed Centrifuges variants?

Begin with the pelleting requirement: bacteria and yeast typically pellet at 6,000 to 10,000 x g, while organelles, protein precipitates and membranes need 20,000 to 50,000 x g. Match capacity to batch size, from 6 x 50 mL to 6 x 500 mL or 4 x 1 L. Decide whether a floor or large benchtop unit fits the lab. Refrigeration is almost always required. Choose rotor materials by lifetime and corrosion resistance, since aluminum is economical but carbon fiber and titanium offer higher speed and better chemical tolerance. Evaluate programmable ramps, rotor life logging, aerosol-tight lids, and whether a swing-bucket option is needed for gradients or large-volume clarification.