Ultra-Low Temperature Freezers

Cold, hard confidence for your samples.

For more than 70 years, Thermo Scientific Ultra-Low Temperature Freezers have been protecting and preserving some of the world’s most valuable biological samples. Our portfolio of -80° and -40° cold storage products are built to deliver uncompromising reliability and dependability because we know your samples are priceless and irreplaceable. But our obsession with freezer performance doesn’t end with reliability, it starts there.


Through deep experience and collaboration with customers at leading labs around the world, our ULT freezers incorporate advancements in energy efficiency, sustainability, storage space optimization and ergonomics that make them as easy to use as they are dependable. 

Protect your samples with ULT chest freezers

A greener alternative wiith outstanding performance

ISO Class 5.5
TSX and TDE Series ultra-low freezers have been independently tested and designated by Underwriters Laboratories (UL), in accordance with ISO 14644-14:2016, to meet the International Organization for Standardization (ISO) Class 5.5.

Ultra-capable for ultra-confidence in sample storage

Guidance for cold storage temperature mapping

Although there are many ways to map temperatures in a freezer, a few basic practices can help mapping practitioners avoid common problems. This white paper provides guidance for properly setting up mapping tests for laboratory freezers.

Intelligent temperature control and monitoring

An intuitive user interface and easy-to-read information center at eye-level deliver accurate temperature monitoring data in the lab, while Device Link enables remote monitoring anywhere in the world.  An integrated USB port offers more convenient data download for tracking and analysis. 

Setting the standard for cold storage performance

With the fastest door opening recovery (DOR) in the industry, Thermo Scientific TSX ULT freezers ensure that your samples spend more time at optimal storage temperature, even in the most challenging lab environments. 

Energy efficient and sustainable

Thermo Scientific ULT freezers deliver high performance without sacrifice.  Choose from models that are Energy Star Certified, use natural refrigerants, lower cost to operate and manufactured in zero waste to landfill facilities for much smaller carbon footprint. 

Ergonomic design

Quiet operation, intuitive, easy to read controls, ergonomic handles, well balanced doors and other thoughtful design features make Thermo Scientific ULT freezers the right choice for your lab, well beyond the usual performance measures. 

Optimized sample storage configuration

Standardized rack, tray and box storage accessories optimize the amount of samples you can store in a square foot of space, while enabling better organization and ease of use.