Labotemp Portable Ultra Low Temperature Freezer -86°C ULF-25 is a high-performance Stirling Freezer engineered for the safe storage and transportation of temperature-sensitive biological samples, vaccines, pharmaceuticals, reagents, and research materials. Featuring a 25 L storage capacity, an adjustable temperature range from +25°C to -86°C, and ±1°C temperature stability, it delivers dependable ultra-low temperature preservation for laboratories, clinical facilities, pharmaceutical cold chains, and field research. High-performance vacuum insulated panels combined with polyurethane foam insulation minimize heat loss, while the PT100 temperature sensor ensures precise monitoring and stable storage conditions. Designed for maximum flexibility, the ULF-25 operates on both 100–240 V AC and 12/24 V DC power, making it ideal for mobile laboratories, emergency response, and cold chain transportation.
Advanced Stirling Cooling Technology
The ULF-25 utilizes a free-piston Stirling Freezer system that cools by cyclically compressing and expanding helium gas within a sealed mechanism, eliminating the need for conventional compressor technology. With fewer moving components, Stirling cooling offers lower vibration, quieter operation, greater reliability, and reduced maintenance than traditional compressor-based freezers. The system rapidly reaches -86°C, maintains stable temperatures within ±1°C, and consumes an average of only 70 W during steady operation, providing excellent energy efficiency without compromising performance. Using environmentally friendly refrigerant, intelligent temperature monitoring, and integrated high/low temperature alarms, the ULF-25 delivers sustainable, long-term ultra-low temperature storage for demanding laboratory and cold chain applications.
Why Choose Labotemp Portable Ultra Low Temperature Freezer ULF-25?
✓ Advanced Stirling Freezer: Compressor-free cooling for quiet, low-maintenance, and energy-efficient operation.
✓ Portable Cold Chain Solution: 25 L capacity with AC/DC power compatibility for laboratory, transport, and field applications.
✓ Reliable & Eco-Friendly Design: Vacuum insulation, PT100 sensor, and intelligent alarms ensure safe, efficient, and dependable performance.
| Temperature Range | +18°C to –86°C |
|---|---|
| Volume | 25 L |
| Power Supply | 100V AC–240V AC, 50/60Hz; 12V DC–24V DC |
| Maximum Power / Current | 100 W (0.5A @220V, 4.6A @24V) |
| Refrigerant | Helium (He) |
| Heat Transport System | Gravity-driven thermosiphon |
| Cooling Engine | Free Piston Stirling Cooler |
| Temperature Control Accuracy | Target temperature ±2°C |
| Performance (25°C ambient, empty) | ~3.5 hours from 25°C to –80°C |
| Steady-State Power Consumption | 75 W |
| Insulation | High-performance vacuum insulated panels + polyurethane foam |
| Noise Level | <55 dB |
| Control Sensor | RTD (PT100 Class B), precision ±0.3 |
| Alarm | High/low temperature alarm (setpoint ±10°C) |
| Security | Lockable lid |
| Defrost Method | Manual |
| Environmental Conditions | Non-corrosive, non-flammable, non-explosive; altitude ≤2000 m |
| Interior Dimensions (L×W×D) | 300×250×300 mm |
| Exterior Dimensions (L×W×D) | 616×392×455 mm |
| Net Weight | 21 kg |
| Shipping Dimensions (L×W×D) | 710×480×530 mm |
| Shipping Weight | 26 kg |
Clinical & Hospital Laboratories: Provides reliable ultra-low temperature storage for biological specimens, diagnostic samples, plasma, serum, and other temperature-sensitive clinical materials.
Pharmaceutical & Biotechnology: Maintains the integrity of vaccines, pharmaceutical products, reagents, enzymes, and biologics during laboratory storage and cold chain transportation.
Research & Academic Institutions: Supports long-term preservation of DNA, RNA, proteins, cell cultures, microbial strains, and valuable research samples for life science and biomedical studies.
Mobile Laboratories & Field Research: Portable AC/DC operation makes it ideal for on-site sample collection, environmental monitoring, veterinary diagnostics, and remote scientific expeditions.
Cold Chain Logistics: Ensures secure transport and temporary storage of temperature-sensitive materials during distribution, emergency response, and vaccine delivery programs.
Public Health & Emergency Response: Suitable for rapid deployment in outbreak investigations, disaster relief operations, and mobile healthcare units requiring dependable ultra-low temperature preservation.
