Ultra-Low Temperature Freezer — Stirling Engine | -86°C | 22L | 12V/24V/110V/220V Universal | PID Precision Control
Product Overview
Professional-grade ultra-low temperature freezer powered by advanced Stirling engine technology. Designed for medical, health, chemical, and scientific research applications requiring reliable low-temperature freezing, storage, and testing. Featuring wider temperature range, lower power consumption, and lighter weight than traditional compressor freezers — with true 22L effective capacity and multi-voltage compatibility for laboratory and field use.
Key Advantages — Stirling Engine vs. Traditional Compressor
 
 
Feature Stirling Engine Traditional Compressor
Temperature Range +18°C to -86°C Limited low-end range
Power Consumption 70W steady state (at -86°C, 25°C ambient) Significantly higher
Weight 59 lbs / 27 kg (portable by one person) Heavy, requires dolly
Size Compact 78×41×51cm Larger footprint
Efficiency Higher thermodynamic efficiency Lower efficiency
Temperature Stability ±1°C precision Wider fluctuations
Stirling Engine Principle: A heat engine operated by cyclic compression and expansion of gas between different temperatures, resulting in net conversion of heat energy to mechanical work — no refrigerants, no vibration, ultra-long service life.
Key Features
Ultra-Wide Temperature Range • Adjustable from +18°C down to -86°C (64.4°F to -124.6°F) • Customizable to -87°C upon request • Traditional compressors cannot achieve this range (+18°C to -45°C typical limit)
Universal Voltage Compatibility • 12V / 24V / 110V / 220V — all usable without modification • AC power supply or battery power — ideal for field research, mobile labs, backup storage • One unit adapts to any global electrical standard
PID Precision Temperature Control • High-precision probe monitors temperature in real time • Dynamic cooling output: Compressor reduces cold output as set temperature approaches — no overshoot • Temperature difference controlled within ±1°C • Program balances cooling speed with control accuracy — not just fast cooling, but stable holding
Rapid Cooling Performance (at 25°C ambient) • 1.5 hours to -45°C • 2.5 hours to -60°C • 3.5 hours to -80°C • Minimum: -86°C
Superior Insulation System • High-performance vacuum insulated panels + polyurethane foam • 304 stainless steel inner chamber — corrosion-resistant, easy to sanitize • Safety buckle lid with self-locking function ensures airtight seal
Compact and Portable • Net weight: 59 lbs / 27 kg — easily moved by one adult • External dimensions: 78 × 41 × 51cm (30.7 × 16.1 × 20.3 in) • Internal dimensions: 33 × 22 × 34cm (13.1 × 8.7 × 13.4 in) • True effective capacity: 22L (equivalent to other brands' marketed 25L)
Intelligent Safety Alarms • Overtemperature alarm activates automatically when set temperature is reached • Triggers if temperature exceeds set point ±10°C • Thermometer probe included for independent temperature verification • Alarm disabled during initial cooldown — no false alerts on startup
Technical Specifications
 
 
Specification Details
Cooling Engine Free-piston Stirling Engine
Temperature Range +18°C to -86°C (customizable to -87°C)
Temperature Stability ±1°C
Voltage Options 12V / 24V / 110V / 220V (universal)
Power Supply AC mains or battery
Steady State Power 70W average (at -86°C, 25°C ambient)
Effective Capacity 22L
External Dimensions 78 × 41 × 51cm (30.7 × 16.1 × 20.3 in)
Internal Dimensions 33 × 22 × 34cm (13.1 × 8.7 × 13.4 in)
Net Weight 27 kg / 59 lbs
Chamber Material 304 Stainless Steel
Insulation Vacuum insulated panels + polyurethane foam
Defrost Manual
Packaging Wooden box
Critical Operating Instructions
Before First Use • Let unit stand for 4 hours after unboxing before powering on — allows refrigerant/gas to settle • Read instruction manual carefully before operation
Installation Requirements • Minimum 50cm clearance around fan vents and heat dissipation components • Ensure unobstructed airflow for optimal cooling efficiency
Loading Protocol (Due to compact 22L volume) • Wait until internal temperature stabilizes at set point before loading items • Add items in small amounts, multiple times — maintains faster temperature recovery • Avoid loading large batches at once — triggers overtemperature alarm
Alarm Logic • Initial cooldown: Overtemperature alarm is disabled during startup • At set temperature: Alarm automatically enables • Trigger condition: Temperature exceeds set point ±10°C • False alarm prevention: Follow small-batch loading protocol
Troubleshooting • Overtemperature alarm or error codes may display during normal use • Refer to instruction manual for code definitions • Contact Amazon seller support at any time for assistance
Application Fields
• Medical and clinical specimen preservation • Pharmaceutical cold chain storage • Chemical reagent low-temperature testing • Scientific research sample freezing • Biological material long-term storage • Field research mobile laboratories • Vaccine transport and backup storage
Package Contents
• 1 × LABFENG Ultra-Low Temperature Freezer (Stirling Engine) • 1 × Thermometer Probe • 1 × Power Cord (multi-voltage compatible) • 1 × User Manual
Shipping Information
• Packaging: Wooden box for international transit protection • Estimated packaged weight: ~35-40 kg • Ships via freight carrier
Pro Tips for Best Results
Pre-cool empty chamber to target temperature before loading valuable samples. Use thermal mass (cold packs) to stabilize temperature during door openings. For battery operation, ensure adequate amp-hour capacity — 70W at 12V draws approximately 5.8A continuously.
Order Today
Next-generation Stirling cooling technology for laboratories demanding portable, precise, ultra-low temperature storage. Inquire now for voltage configuration and delivery options.

 Handling Time: Shipping is usually made in 1-5 business days after payments cleared. Orders are processed from Monday-Friday; Not on the weekends & public holidays，If the machine you order includes voltage or mold, please note the voltage or size you need when ordering so that we can arrange delivery for you！

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1 year warranty for the machines, not for the consumables. We stand  behind our products all the item, so even if your warranty period  has expired, you can still seek for service or technical support  from us with low cost.

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Business Hour: Monday To Friday: 9:00 AM to 6:00 PM (Beijing China time)

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On May 26, 2026 at 02:27:06 PDT, seller added the following information:

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