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ULTRA-25N portable ultra-low temperature refrigerator
We have been searching for a green and environmentally friendly ultra-low temperature control device until the emergence of Stirling Ultracold product
Product details

We have been searching for a green and environmentally friendly ultra-low temperature control device until the emergence of Stirling Ultracold products. The company currently only has three products, 780L, 105L, and 25L, but these three products are enough to make humans feelproud. At present, the global climate is warming, and world politicians are arguing about it, but no one is sitting downAssess the impact of this technology on the world. If global refrigerationThe technology has been upgraded to Stirling free piston technology, which may slow down the processThe melting of Antarctic glaciers. The birth of Stirling technology has already reached 200many yearsofhistory. Our predecessors have been exploring the possibility of commercializing this technology in industry. Until January 2013, Stirling technology stepped down from the high cooling altar of aerospace, military, electronics, and energy, focusing on the SU780UE ultra-low temperature refrigerator for biopharmaceuticals, clinical vaccines, and life sciences. It has undergone rigorous testing andAfter user evaluation, truly enter the market. two thousand and thirteenMay of the yearThis product has been awarded the International Society for Biological and Environmental Protection(ISBER’s)The "Best New Product of the Year" award is presented to recognize Stirling Ultracold's outstanding contributions to environmental protection and energy conservation.This award is given to only one product each year.
Global Cooling, as the manufacturer of this ultra-low temperature refrigerator, is on par with Sunpower and Twinbird, the world's pioneers in this field. The reliability of its technology has been tested in the market for over 30 years. We have been emphasizing the benefits of the product for users, so what are the advantages of this ultra-low temperature refrigerator?
1、 Energy saving. This is the biggest feature and also the future development trend of the industry. I once published an article on the public WeChat account of Hengze Technology titled 'Sterling Free Piston Technology - Leading the Future of Low Temperature Refrigeration Technology', which provided a detailed explanation of the energy-saving features of this product. The free piston technology itself does not require liquid nitrogen, compressor refrigeration, or Peltier refrigeration. As long as helium gas is compressed and expanded, energy exchange can be achieved. We quote the inventor of this technology, Robelt Stirling, in 1816:
“All my improvements for diminishing the consumption of fuel, consist of the differing forms or modification of a new method, contrivance, or mechanical arrangements for heating and cooling liquids, airs or gases, and other bodies, by the use of which contrivance heat is abstracted from one portion of such liquids, airs or gases, and other bodies, and communicated with another portion with very little loss, so that in all cases where a constant succession of heated liquids or other bodies is required, the quantity of fuel necessary to maintain or supply it is by this contrivance greatly diminished”. Robert Stirling
Translated into English, the general idea is as follows:
All my improvements, including various forms, modifications to new methods and structures, or mechanical constructions that rely on gas, liquid, and other substances for heat exchange, are aimed at reducing fuel consumption. Through this structure, heat is extracted from liquids, air, and gases, and the heat loss for heat exchange with other media is very small. Therefore, the energy supply required for continuous heat exchange in any situation is greatly reduced.
It is this core technology that achieves very low energy consumption.Bioinformatics expert at Einstein College of Medicine in New York, USA
Cruikshank said that comparing the energy consumption of Stirling refrigerators with traditional stacked freezers, it was found that the former can save 50% to 60% of energy.
2、 Durable. The free piston Stirling cooler adopts advanced technologies such as linear motor drive, plate spring support, gap sealing, and pure pneumatic expansion. It has the advantages of compact structure, light weight, oil-free, few moving parts, high reliability, low noise, low vibration, not easy to wear, long service life, and convenient and adjustable cooling capacity. Obviously, using gas compression, non-contact gas bearings and seals, there is almost no wear and tear, and the service life is naturally long. Research data shows that the average time before failure of the refrigeration unit reaches 80000 hours. Therefore, Stirling Ultracold promises a 2-year warranty for components and a 7-year warranty for engines.
For more product information and technical support, please contact Shanghai Hengze. The technical parameters are as follows:

Specifications Model Number:Stirling UltracoldULT-25N
Application, Rating and Electric Data
Application Storage of general (non-flammable) laboratory materials
Storage Volume 25 liters (0.9 cu.ft.)
Storage Capacity 18 standard 2' boxes in drawer racks, optional, available separately
Temperature Range 86 to -20ºC @ 32ºC (90ºF) ambient, adjustable to 1ºC increments
Electric Power 120V or 240V, AC; 60Hz or 50Hz; or 12V DC from mobile source
Maximum Power (Current) 280 watts (3.6 amps @120V, 1.8 amps @240V)
Auto-Voltage Capability 88V to 264V, 50 or 60 Hz
Electric Supply Rating 15 amp or greater grounded circuit
Power Plugs Supplied NEMA 5-15P plug requires standard NEMA 5-15R receptacle (120V); Length: 2261 mm (89 in.), or
NEMA 6-15P plug requires standard NEMA 6-15R receptacle (240V); Length: 2997 mm (118 in.). Specify when ordering
Certification/Agency Listing CE
Noise Typical of laboratory equipment
Indoor/Outdoor Use Indoor use only
Application Environment Non-corrosive, non-flammable, non-explosive
Ambient Operating Temperature +5ºC to +35ºC (41ºF to 95ºF)
Useful Life 12 years, nominal
  Refrigeration System
Cooling Engine Humm ™ helium charged free-piston Stirling engine with continuous modulation
Heat Transport System Gravity driven thermosiphon operates on acooling medium of 0.4 oz to 0.9 oz (10 to 25
grams) depending on medium used
Refrigerant R-508B nonflammable CFC/HCFC-Free
Evaporator Cold wall (inner liner)
Heat Rejection Finned heat exchanger with forced air cooling
Air inlet: Above freezer door below mechanical compartment
Air outlet: Right side of top cover, upward
Defrost Method Manual
  Controller
Controller Type Microprocessor with touchscreen input and display
Security Lockable door
Optional PIN requirement built in
Warm and Cold Alarms Setpoint ± 10°C
Control Sensor One RTDs (PT100 Class B)
Event Log All alarms, door openings
Dry Contacts optional
  Performance Data,-80ºC Setpoint at Ambient 25ºC ± 2ºC, Empty Cabinet
Pull-Down from Ambient 2.2 hours
Recovery from 2 Minute
Door Opening
20 minutes to -80°C
Warm-Up Profile 30mins to -60ºC
70mins to -40ºC
130mins to -20ºC
Steady State Energy Use < 2.8='' kwh/day='' at='' -80°c='' setpoint=''>
Heat Dissipation 403 BTU/h (load to HVAC)
  Dimensions and Construction
Interior (L x W x D) 332 x 221 x 340 mm | (13.1 x 8.7 x 13.4 in.)
Exterior (L x W x D) 692.5 x 350 x 460 mm | (27.3 x 13.8 x 18.1 in.)
Net Weight, Empty 21 kg (46 lbs.), nominal 21 kg (46 lbs.), nominal
Shipping Dimensions(L x W x D) 787.4 x 482.6 x 584.2 mm | (31 x 19 x 23 in.)
Shipping Weight 26.3 kg (58 lbs.), nominal
Insulation High performance vacuum insulated panels and polyurethane foam
Options Plastic Utility Bin, AC Power Supply, Mobile,Power DC Cord, Sub-Lid, Certificate of Calibration,
Temperature Mapping Validation,

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