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Thermo Scientific™ Sorvall™ WX Floor Ultra Centrifuges

This product has been discontinued.

Manufacturer:  Thermo Scientific™ 46901

 View more versions of this product

Catalog No. 50-870-522

Please call Customer Service at 1-800-234-7437 or send an email to help@thermofisher.com for assistance.



The Thermo Scientific™ Sorvall™ WX floor model ultracentrifuge series has been discontinued. For your ultracentrifugation needs, please see our new Thermo Scientific Sorvall WX+ ultracentrifuge series.

Key Features

  • The intuitive user interface consists of an interactive color touch-screen and a positive feedback keypad for quick protocol setup and storage
  • For routine spins, simply enter speed, time and temperature parameters
  • Real-time control means the sample is ready when you are—schedule delayed start/stop times
  • Program memory saves time by storing up to 20 programs into memory along with User ID and comments

Outstanding Control with UltraSecur

  • Embedded software enables better control of multi-user access, greater convenience and improved safety
  • User lockout feature prevents unauthorized access
  • Rotor life management tracks rotor usage and alerts when rotors need to be serviced or replaced

Excellent Space Savings and Efficiency

  • Runs quietly for use anywhere in the lab
  • Less than 20A load reduces power consumption and eliminates burden on HVACs
  • 3″ lower deck height for easier rotor loading/unloading; door opens with just a push
  • Smaller footprint utilizes minimal floor space
  • Imbalance-Tolerant Drive saves time with visual tube balance

Easier Sample Loading for Safer Separations

  • Unique StepSaver™ rotors use cartridges to streamline sample loading and unloading steps, minimizing sample loss
  • Thermo Scientific™ SureSpin™ rotors prevent swinging buckets from being loaded improperly, avoiding sample loss, run shut-downs and rotor failures

Simulate New Protocols and Ensure Regulatory Compliance

  • Windows™-based Compass run simulation software allows development of separation protocols on laptop or PC
  • Set run parameters and convert run values
  • Calculate k-factors, pelleting times, de-rating speeds, molecular masses, s-value conversions, and crystallization times
  • Simulate particle sedimentation and diffusion for complex rate-zonal separations

Ordering Information:

Optional accessories include rotors, software, printers, user lockout device, and HEPA filter kit. WX Series accepts ultra rotors from most major manufacturers. Rotors are sold separately.


NEMA plug 6-30P and IEC60309 CEE plug 32A-6h 2P+PE

Recommended for:

  • Biochemistry
  • Cell biology
  • Lysate clarification
  • Molecular biology
  • Nanoparticle separations
  • Nucleic acid purification
  • Proteomics
  • Virus concentration


90,000 rpm
10/11, brake off 10/11, brake off
±10 rpm
39.4/33.4 in. height to top of deck
27.2 in.
53 dBA
31.1 in.
Sorvall WX90 Ultracentrifuge
6 x 250 mL
39.4/33.4 (height to top of deck) x 31.1 x 27.2 in. (100/85 (height to top of deck) x 79 x 69 cm)
20, each with step runs
0°C to 40°C
10°C to 35°C
Floor Model Centrifuge
208/240 V 50/60 Hz
16/20 A
<1 kWh
100/85 cm height to top of deck
69 cm
Solid-state thermoelectric (CFC free)
79 cm
CE and cCSAus certified
881.8 lb. (400 kg)
cCSAus, CE
Product Certifications