Benchtop Ultracentrifuge

What is the Benchtop Ultracentrifuge?

A benchtop ultracentrifuge reaches 90,000 to 150,000 rpm and up to 1,000,000 x g with small fixed-angle and vertical rotors holding 0.2 to 4 mL tubes. It suits labs with limited space that run small-volume gradients, ribosome and protein pelleting and exosome isolation.

Overview

Benchtop ultracentrifuges achieve extreme speeds by using very small rotors, typically 4 to 8 tubes of 0.2 to 4 mL, in a compact chamber. Maximum speeds range from 90,000 to 150,000 rpm, reaching 500,000 to over 1,000,000 x g at rotor radius under 5 cm. A direct-drive motor with air or magnetic suspension and a small oil-free vacuum pump bring the chamber to under 1 Pa within 1 to 2 minutes, and runs take minutes to hours. Benchtop size of about 55 x 65 x 45 cm and a weight of 80 to 150 kg allow placement on a sturdy bench. Rotor sets include fixed-angle, swing-bucket and near-vertical designs for small volumes. Because capacity is limited to a few milliliters, the format suits analytical, screening and small-prep work rather than bulk purification.

How does it work?

An ultracentrifuge drives a titanium or carbon fiber rotor through a high-frequency induction or brushless motor, typically with a magnetically suspended or oil-lubricated flexible shaft. The chamber is evacuated below 0.1 Pa (1 micron Hg) by a rotary vane and diffusion or turbomolecular pump, eliminating air friction that would otherwise overheat the rotor. Refrigeration controls rotor temperature via infrared sensing, usually between 0 and 40 C. Particles sediment according to Stokes' law, with sedimentation coefficients measured in Svedberg units, in preparative runs, or are separated by buoyant density in cesium chloride, sucrose or iodixanol gradients in isopycnic runs. Rotors are identified automatically, and the control system tracks run hours and cycles to derate them. A heavy armor ring contains rotor fragments in the event of failure.

What are the key features?

• Reaches 90,000 to 150,000 rpm and over 1,000,000 x g with small rotors
• Compact 55 x 65 cm footprint sits on a sturdy laboratory bench
• Oil-free vacuum pump reaches chamber vacuum in 1 to 2 minutes
• Fixed-angle, swing-bucket and near-vertical rotors for 0.2 to 4 mL tubes
• Touchscreen with programmable runs, rotor recognition and cycle counters

What are the technical specifications?

A typical benchtop ultracentrifuge configuration offers maximum speed of 90,000–150,000 rpm, maximum RCF of up to approx. 1,000,000 x g, tube capacity of 4–8 x 0.2–4 mL, temperature range of 0 to 40 °C, time to vacuum of 1–2 min and vacuum pump of Oil-free diaphragm or scroll. 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 Benchtop Ultracentrifuge is used in small-volume density gradients, ribosome and protein pelleting, exosome and extracellular vesicle isolation and nanoparticle and lipid vesicle work. Across the wider Ultracentrifuges class, laboratories also deploy it for virus and viral vector purification, exosome and extracellular vesicle isolation and lipoprotein fractionation.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-020, IEC 61326-1, ISO 9001, EN 12469 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 200 to 450 kg and often require a dedicated 220 V or 380 V circuit and a level, vibration-free floor. Rotor management is critical: log every run, derate titanium and aluminum rotors per the maker's schedule, and retire rotors at the stated lifetime. Use only tubes and adapters certified for the rotor, and fill them as specified. Vacuum pumps need periodic oil changes, and seals require inspection. Clean rotors with neutral detergent and never use chloride or strong alkali on aluminum. Annual preventive maintenance should include speed, temperature and vacuum checks. Install and operate in line with IEC 61010-2-020 and local pressure-vessel and biosafety rules.

How do I select the right Benchtop Ultracentrifuge?

Choose the benchtop unit for limited space, small volumes up to about 30 mL per run, and fast turnaround. It cannot replace floor-standing siblings for large batches or zonal work. In the RFQ, specify rotors, tube sizes, maximum RCF, runtime expectations and bench loading.

How does it compare with other Ultracentrifuges variants?

Specify the maximum RCF needed: 100,000 to 150,000 x g suits most gradient and pelleting work, while ribosomes, small viruses and proteins need 300,000 to 600,000 x g or analytical capability. Choose rotor geometry to match the task, with swing-bucket rotors for gradients, fixed-angle rotors for pelleting, vertical or near-vertical rotors for fast gradients and zonal or continuous-flow rotors for large volumes. Consider tube materials and sealing, because ultracentrifuge tubes require heat-sealed or cap-assembled closures. Evaluate run documentation, rotor life tracking, temperature range, vacuum time, noise, and installation needs including weight, power and cooling water. For multi-user facilities, autoclavable rotors and biosafety containment options matter.