Our Next Generation ULT Freezer, the SU780XLE is Now Available

The new SU780XLE upright ULT freezer pictured with the Stirling Ultracold operations team in our Athens, OH manufacturing facility.
The new SU780XLE upright ULT freezer pictured with the Stirling Ultracold operations team in our Athens, OH manufacturing facility.

The entire Stirling Ultracold team is very pleased to announce the official release of our next generation ultra-low temperature freezer. Now available for order, the new SU780XLE is successor to our award-winning SU780UE upright model, which has become the industry benchmark for ULT energy efficiency since its introduction in 2013.

So why did we decide to bring the new “XLE” to market when our current model was already the established leader in sustainability, energy savings and performance? While we were very proud to have introduced the most significant ULT innovation in decades, the advanced Stirling engine, our new ULT model exemplifies the spirit of continuous improvement that has helped us change the industry mindset in a relatively short time. When we realized that we had learned to make a great freezer even better . . . That’s when we decided to introduce the new XLE!

The SU780XLE not only uses 70-75% less electric power than standard compressor-based ULT freezers, but it takes cooling performance integrity and system reliability to a whole new level.  This will allow our users to keep their valuable samples safer than ever, while at the same time spending even less on energy and lifecycle cost.

The new SU780XLE ultra-low freezer features the following:

  • +/- 1°C temperature variation over time at steady state
  • 1/3 additional sample storage per square unit of floor space
  • New ergonomically designed handle and cabinet
  • 100% natural refrigerant cooling system
  • Industry’s widest temperature set-point range: -20° to -86°C
  • 100% adaptive control, enabling the industry’s fastest temperature pull-down and door opening recovery
  • Universal voltage input, plugs into any outlet

Our freezers have already proven that cooling performance doesn’t have to be compromised to save energy. That’s important because it means that organizations can reduce environmental impact and cost, while using the very best tools to find a cure for cancer. The introduction of the new XLE ultra-low freezer continues our industry leadership in system reliability, sample integrity, sustainability and lower total cost of ownership.

Find out more about our new SU780XLE upright model.

The Stirling Engine Celebrates Its Bicentennial

Stirling Engine inventor, Robert Stirling
Stirling Engine inventor, Robert Stirling

The matchless cooling technology at the heart of thousands of our ULT freezers today, has a unique “garage story” that traces its roots back to the invention of the Stirling engine in 1816. First conceived by a Scottish minister named Robert Stirling, the original reciprocating piston heat engine was designed to improve fuel efficiency over more common steam engines of the time. Although our version of the Stirling engine uses advanced electronics, linear motion control and gas bearings that Robert Stirling could never have dreamed of, his amazingly efficient design concept is at the core of our freezers today. That’s why the recent bicentennial celebration of Dr. Stirling’s discovery is personally meaningful to me and for all of us at Stirling Ultracold.

A model of an Stirling engine can be seen at Galston Parish Church, where Robert Stirling ministered for 54 years.
A model of an Stirling engine can be seen at Galston Parish Church, where Robert Stirling ministered for 54 years.

Since its creation, the Stirling engine design has seen a number of advancements, including an early application of our patented technology on the Space Shuttle and the RHESSI satellite, where the engine has been cooling instruments for over 14 years in a geocentric orbit. In 2009, Global Cooling’s founder David Berchowitz led an effort to harness the significant cooling performance and energy advantages of the free-piston Stirling technology for ultra-low temperature storage applications. Initially, the portable Shuttle ULT was introduced, followed by the undercounter SU105U and the SU780U upright ULT freezer in 2013.

The Galston Parish Church has an active congregation in Scotland today.
The Galston Parish Church has an active congregation in Scotland today.

Since the beginning, our use of the Stirling engine has been unique in the ultra-low temperature market. We’ve been able to provide the research community with more efficient, reliable alternative to decades-old cascade compressor technology–thanks to Robert Stirling’s invention.

Celebrating this invention, Northumbria University (Newcastle, UK) recently hosted the 17th International Stirling Engine Conference and Exhibition. Stirling Ultracold founder, David Berchowitz, and I attended the event, which marked the invention’s bicentennial anniversary. As the global leader in the commercialization of the Stirling engine, we were pleased to share our story with conference attendees. I spoke about our experiences in the ULT freezer industry and how we’ve changed the way organizations think about buying freezers.

Stirling Ultracold’s Neill Lane (left) and David Berchowitz (right) at the Robert Stirling monument in Galson Scotland.
Stirling Ultracold’s Neill Lane (left) and David Berchowitz (right) at the Robert Stirling monument in Galson Scotland.

While in the UK, we also had the chance to visit the church where Robert Stirling ministered for more than 50 years, Galston Parish. Stirling’s invention is held in such high regard at the parish, there are engine displays inside the church, along with a prominent Robert Stirling monument in the local cemetery.

As the Stirling engine passes its 200-year benchmark, I believe we’ll continue to see improvements and new applications for this inherently-efficient engine. We owe a lot to Robert Stirling and, having recently commemorated his achievement, I feel a sense of pride as we continue his story. For a more in depth account of the Stirling engine’s history and its use in our freezers, you can visit our History web page.