Premium ULT freezer

Peace of mind protection for precious samples.
Your focus should be your discoveries. Our focus is keeping them safe. Our TSX ultra-low freezers (ULT) provide prime protection of your most precious samples, even in the most taxing conditions. They meet the highest sustainability, temperature management and reliability standards for -80°, -70°, and -60°C storage. Powered by V-drive adaptive control technology, these state-of-the-art, upright freezers provide energy savings of up to 70% without compromising sample protection. They're quiet and enable lower HVAC costs with very low heat ouput.

  • ENERGY STAR® Certified
  • US EPA SNAP and EU F-Gas compliant refrigerants
  • Significant energy savings without compromising sample protection
  • Available in four upright sizes
  • Whisper-quiet operation
  • Meets ultra-tight temperature uniformity requirements
  • Touchscreen puts information at your fingertips

Use our ULT selection guide, browse through our portfolio below, or ask one of our experts to help tailor a solution specific to your needs.

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Choose your TSX ULT freezer by capacity and footprint

Make the most of your lab space with a choice of sizes that can hold from up to 400 (2-inch) boxes in a footprint of 7.42 sq. ft. all the way up to 700 (2-inch) boxes in a 11.86 sq. ft. footprint.

 400 Boxes*500 Boxes600 Boxes700 Boxes
 400 box TSX ULT freezer500 box TSX ULT freezer600 box TSX ULT freezer700 box TSX ULT freezer
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Capacity19.4 cu. ft. (549 liters)24.1 cu. ft. (682 liters)28.8 cu. ft. (816 liters)33.5 cu. ft. (949 liters)
2mL Vial Capacity40,00050,00060,00070,000
28.3 x 23.1 x 51.2 in
71.9 x 58.8 x 130.1cm
28.3 x 28.8 x 51.2 in
71.9 x 73.0 x 130.1cm
28.3 x 34.4 x 51.2 in
71.9 x 87.3 x 130.1cm
28.3 x 40.0 x 51.2 in
71.9 x 101.6 x 130.1cm
37.6 x 28.3 x 78 in
95.5 x 71.9 x 198.1cm
37.6 x 34.0 x 78 in
95.5 x 86.4 x 198.1cm
37.6 x 39.6 x 78 in
95.5 x 100.6 x 198.1cm
37.6 x 45.2 x 78 in
95.5 x 114.8 x 198.1cm
Shipping Weight665 lbs. (302kg)721 lbs. (327kg)790 lbs. (358kg)894 lbs. (406kg)

*Box capacity is in terms of 2-inch (5cm) high boxes.

Configure your ultra-low storage solution

Find an ultra-low temperature freezer by walking through a series of selections based on your lab space requirements. A representative will contact you soon with a recommendation.

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What is V-drive technology?

Unlike standard, single-speed compressors that cycle on and off, our V-drive technology runs at variable speeds to adjust cooling performance to the conditions inside and outside of the freezer. It allows the freezer to adjust to factors such as start-up and door openings when a higher compressor speed is needed. When conditions are normal or stable, the drive runs at a lower speed while still protecting your samples.

Adaptive control of the V-drive quickly and efficiently restores set point even during multiple door openings in a busy lab.

V-drive technology chart
Variable Speed Compressors (V-Drive) change speed in response to activity instead of cycling on and off like standard, single-speed compressors.

3D Demo: Explore TSX Ultra Low Temperature Freezers

A software tool for exploring the internal and external benefits of the Ultra Low Freezers. Hot spots throughout the tool feature data, researcher opinions, and technical specifications. Mouse operation enables rotation, zoom, and measurement.

ULT Brochure

Stability and reliability, without sacrifice.

With temperature security, quick recovery, and reliable validation, Thermo Scientific Ultra-Low Temperature (ULT) freezers are designed to deliver confidence — all while reducing your energy footprint.

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Which plug type do I need?

 Standard Plug TypeVoltageHz
NEMA 5-15115–12060
NEMA 5-20115–12060
NEMA 6-15208–23060
Continental EU

Alternative plugs and cords are available to meet your special needs. Learn more ›

Cryogenic storage

Matrix storage (Barcoded tubes)

Cryo extra sample prep
Matrix Tubes

Standard storage tubes

Racks, boxes and accessories

Externally threaded universal tubes
Freezer racks and boxes

How-to freezer videos