Thermo Scientific -80°C lab freezers, also known as ultra-low freezers (ULT), are designed first and foremost to protect samples. They're also designed to maximize storage capacity by offering a range of upright and chest models to accommodate a variety of laboratory footprint requirements. Additional features include energy-savings models that meet today's sustainability demands. Choose from our premium TSX, advanced or standard performance platforms.

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Which kind of ULT freezer best fits your needs?


Standard performance ultra-low freezers

Advanced ultra-low freezers

Premium (TSX) ultra-low freezers

  ”standard ULT freezer ”advanced ULT freezer ”premium ULT freezer
  Everyday dependability with a simplified operation in upright or chest models. Maximize storage capacity with advanced performance and sustainability features. Designed to meet the highest sustainability, temperature management and reliability standards.
Daily energy consumption  as low as 12.0 kWh/day as low as 9.1 kWh/day as low as 7.9 kWh/day
Door opening recovery as low as 19 min as low as 11 min as low as 17 min
Heat rejection (HVAC load) Medium Low Lowest
Sound Normal Quiet Most quiet
Cooling technology 2-stage cascade compressor 2-stage cascade compressor 2-stage variable speed compressors 
Powered by V-Drive
System refrigerants HFC1 Natural HC2 Natural HC2
Upright freezer storage capacity 240–600 boxes3 300–600 boxes3 400–700 boxes3
User interface Microprocessor control Touchscreen Touchscreen
Certifications UL, cUL, CE, RoHS, xFDA4 UL, cUL, CE, RoHS UL, cUL, CE, RoHS
Outer doors Single and Double Single Single
U.S. EPA SNAP compliant  
EU F-Gas compliant  
Chest freezers    
Soft grip handle    
Thin wall high density storage  
On-board event/temp. recording  
Remote monitoring compatible
Access/user setting controls
USB port for data download  
Setpoint security
Access key/card control options  
  Explore standard performance ULTs Explore advanced ULTs Explore premium TSX ULTs
  1. Hydrofluorocarbon (HFC) refrigerants: legacy refrigerants, higher global warming potential (GWP)
  2. Natural hydrocarbon (HC) refrigerants: Environmentally friendly, low global warming potential (GWP), SNAP approved.
  3. 2-inch (5cm) high boxes
  4. xFDA certification in various countries. Example: FDA Class 1-US, CFDA-China


Featured mechanical cryogenic storage chest freezers

Mechanical cryogenic chest freezers for long-term biological sample storage

Thermo Scientific mechanical cryogenic chest freezers are designed for long-term biological sample storage (-140°–150°C) without LN2 as a cooling medium. With this chest freezer configuration 100% of the interior space of the freezer is usable for sample storage.


Monitor your sample storage conditions 24/7

In the event of a power or mechanical issue, you need to be notified right away. Our wireless monitoring systems are designed for 24/7 monitoring of your ultra-low freezer's performance along with reporting, remote alarm notification and continuous data collection.

View our wireless monitoring solutions ›

Cryogenic storage

Matrix storage (Barcoded tubes)

Standard storage tubes

Racks, boxes and accessories

How-to freezer videos