780 Litre Upright Ultra-Low Temperature (ULT) Freezer

Introducing the Stirling Ultracold, the epitome of reliability and energy efficiency in upright ultra-low temperature (ULT) freezers. When compared to other compressor-based ULT units, the Stirling Ultracold stands out as the superior choice.

Embrace a more sustainable approach to ULT storage without compromising on reliability and performance. By choosing a Stirling unit you can experience lower operational costs, maximize your laboratory space due to the compact design and with the Stirling engine technology, engineered to outlast compressors, it will insure the utmost reliability and the long-term safety of your samples.

  • ± 1°C Steady-state temperature variation over time
  • Faster initial pull-down, ambient to -80°C, <6.5 hours
  • Fastest door opening temperature recovery, 35 minutes to -80°C (when tested using the ENERGY STAR® Final Test Method door opening procedure
  • Connectivity available to BMS/BAS or 3rd-party monitoring system
  • Real-time temperature display
  • Largest storage capacity per sq. ft. of floor space
  • Plugs into any outlet
  • 70-75% less energy than standard compressor-based systems
  • Steady State Energy Use 6.67 kWh/day at -75°C (Weighted Average)
Technical Specification

Volume (Litres): 780
Operating Temperature (°C): ‐20 to ‐86
External Dimensions; W x D x H (mm):  915 x 870 x 1994
Internal Dimensions; W x D x H (mm):  740 x 705 x 1542
Weight (Kg): 284
Insulation: High performance vacuum insulated panels and polyurethane foam using Ecomate®
environmentally friendly, SNAP‐compliant blowing agent
Doors: Outer 1 / Inner 3
Shelving: x2 (adjustable)
Compartments: 600 x 2” Boxes (Optional 700 Box system available)
Noise (dBA): < 45
Ambient Operating Temperature (°C): +5 to +35
Cooling Engine: Helium charged free‐piston Stirling engine with continuous modulation
Heat Transport System: Gravity driven thermosiphon
Refrigerant: R‐170 (Ethane) 90 grams
Evaporator: Cold wall (inner liner)
Heat Rejection: Finned heat exchanger with forced air cooling

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Product Code Description List Price Offer Price
STIRSU780XLE 780 Litre Upright Ultra-Low Temperature Freezer (ULT)
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