Stirling Ultracold Portable/Benchtop Ultra-Low Temp Freezer (-86°C) | 120V
The Stirling Ultracold ULT25NEU is the world’s only portable -86°C ultra-low temperature freezer, offering unmatched mobility, energy efficiency, and performance. With a 25-liter (0.9 cu. ft.) storage volume and ability to hold up to 18 standard 2” boxes, this compact benchtop freezer is ideal for sample transport, personal biological specimen storage, or pharmaceutical cold chain applications. Rugged, reliable, and powered by green Stirling engine technology, it's built for both lab and field use.
Key Features:
- Temperature Range: -86°C to -20°C (adjustable in 1°C increments)
- Temperature Uniformity: ± 0.75°C (top to bottom)
- Storage Capacity: 25L | 0.9 cu. ft. | Holds 18 standard 2" boxes
- Rugged Portable Design: Weighs just 46 lbs (21 kg), built-in handles, compact footprint
- Eco-Friendly Cooling: Uses R-170 refrigerant and Stirling engine—no compressor, CFC-free insulation
- Preset Temperature Modes: -86°C (default), -40°C, -20°C
- Moisture & Weather Resistant Controls for field durability
- Includes: (2) baskets, internal sub-lid, integrated alarms, and pass-through port (¼")
- Optional Mobile DC Power Supply: Enables field use (sold separately)
- Certified: CE Compliant
Technical Specifications
| Storage Volume | 25 L (0.9 cu. ft.) |
| Box Capacity | (18) 2", (12) 3", or (4) 4" boxes |
| Temperature Range | -86°C to -20°C |
| Power | 120V / 60Hz / 280W (3.6A) |
| Interior Dimensions (L x W x H) | 13.1 x 8.7 x 13.4 in (332 x 221 x 340 mm) |
| Exterior Dimensions (L x W x H) | 27.3 x 13.8 x 18.1 in (692.5 x 350 x 460 mm) |
| Net Weight | 46 lbs (21 kg) |
| Shipping Weight | 58 lbs (26.3 kg) |
| Ambient Operating Temp | +5°C to +35°C |
| Refrigerant | R-170 (Ethane) |
| Noise Level | Low – designed for lab or mobile use |
| Certification | CE |
Included Items
- Stirling Ultracold ULT25NEU Freezer
- North American Power Supply – 6 ft. cord, NEMA 6-15R (120V)
- (2) Storage Baskets
- Operator’s Manual
- 1-Year Parts & Labor Warranty
Optional Accessories (Sold Separately)
- Mobile DC Power Supply (10’ cable) – for field use
- Plastic Utility Bin
- Temperature Mapping Validation
- Certificate of Calibration
- Remote Alarm Contact Kit
- Alternate Voltage Models (e.g., 240V)
Note: DC power supply is not included and must be ordered separately for portable applications.