Portable Laboratory Stirling Freezer LDF-22

Labotemp Portable Laboratory Stirling Freezer

Portable Laboratory Stirling Freezer LDF-22

Name: Portable Laboratory Stirling Freezer LDF-22
Brand: Labotemp
SKU: LDF-22
Price: 3608.00 USD
Availability: InStock
Rating: 4.9 (671 reviews)

Labotemp Portable Laboratory Stirling Freezer LDF-22 is a compact portable freezer engineered for reliable ultra-low temperature storage and transport of biological samples, vaccines, pharmaceuticals, reagents, and research materials. Featuring a 25 L storage capacity, adjustable temperature range from +25°C to -60°C, and ±1°C temperature stability, it provides dependable cold storage for laboratory, clinical, pharmaceutical, and field applications. The high-performance vacuum insulation panels and polyurethane foam insulation minimize heat loss while improving energy efficiency, and the integrated PT100 temperature sensor ensures accurate temperature monitoring. Compatible with both 100–240 V AC and 12/24 V DC vehicle power, the LDF-21 is an ideal solution for mobile laboratories, cold chain transportation, emergency response, and remote scientific operations.

Advanced Stirling Cooling Technology

The LDF-22 is powered by a free-piston Stirling cooling engine, an advanced compressor-free refrigeration system that cools by repeatedly compressing and expanding helium gas within a sealed cycle. This design minimizes moving parts, resulting in lower vibration, quieter operation, and reduced maintenance compared to conventional compressor-based freezers. The Stirling engine delivers rapid pull-down to -60°C, maintains ±1°C temperature stability, and consumes an average of only 40 W during steady operation, making it highly energy efficient. Combined with environmentally friendly refrigerant, high-performance vacuum insulation, and intelligent temperature monitoring, the LDF-22 provides reliable, sustainable, and long-term ultra-low temperature storage for laboratory and cold chain applications.

Why Choose Labotemp Portable Laboratory Stirling Freezer LDF-22?

✓ Stirling Cooling Engine: Compressor-free technology for quiet, efficient, and reliable ultra-low temperature cooling.
✓ Portable Cold Chain Design: 25 L capacity with AC/DC power compatibility for laboratory and field applications.
✓ Energy-Efficient Operation: High-performance vacuum insulation and eco-friendly R-170 refrigerant reduce power consumption while maintaining dependable cooling.

$3608

Datasheet

General Specifications
Product Type : Portable Ultra Low Temperature Freezer Product Type	Portable Ultra Low Temperature Freezer
Storage Volume : 25 L Storage Volume	25 L
Temperature Range : +18°C to -60°C Temperature Range	+18°C to -60°C
Cooling Technology : Free Piston Stirling Cooler Cooling Technology	Free Piston Stirling Cooler
Refrigerant : Helium (He) Refrigerant	Helium (He)
Heat Transport System : Gravity-Driven Thermosiphon Heat Transport System	Gravity-Driven Thermosiphon
Operating Environment : 5°C to 35°C, ≤80% RH, Altitude ≤2000 m Operating Environment	5°C to 35°C, ≤80% RH, Altitude ≤2000 m
Internal Dimensions (L × W × D) : 300 × 250 × 300 mm Internal Dimensions (L × W × D)	300 × 250 × 300 mm
External Dimensions (L × W × D) : 616 × 392 × 455 mm External Dimensions (L × W × D)	616 × 392 × 455 mm
Net Weight : 17.5 kg Net Weight	17.5 kg
Cooling Performance & Temperature Control
Cooling Performance : 25°C to -60°C in approximately 2.5 hours Cooling Performance	25°C to -60°C in approximately 2.5 hours
Temperature Control Accuracy : Target Temperature ±1°C Temperature Control Accuracy	Target Temperature ±1°C
Temperature Sensor : One RTD (PT100 Class B), Precision ±0.3 Temperature Sensor	One RTD (PT100 Class B), Precision ±0.3
Steady-State Energy Consumption : 40 W Steady-State Energy Consumption	40 W
Noise Level : <55 dB Noise Level	<55 dB
Warm & Cold Alarm : Setpoint ±10°C Warm & Cold Alarm	Setpoint ±10°C
Defrost Method : Manual Defrost Method	Manual
Electrical & Construction
Power Supply : 100–240 V AC, 50/60 Hz; 12–24 V DC Power Supply	100–240 V AC, 50/60 Hz; 12–24 V DC
Maximum Power Consumption : 100 W (0.5 A @ 220 V, 4.6 A @ 24 V) Maximum Power Consumption	100 W (0.5 A @ 220 V, 4.6 A @ 24 V)
Insulation : High-Performance Vacuum Insulated Panels with Polyurethane Foam Insulation	High-Performance Vacuum Insulated Panels with Polyurethane Foam
Security : Lockable Lid Security	Lockable Lid
Packaging Information
Shipping Dimensions (L × W × D) : 710 × 480 × 530 mm Shipping Dimensions (L × W × D)	710 × 480 × 530 mm
Shipping Weight : 21 kg Shipping Weight	21 kg

Stirling Cooling ➤ Stirling Cooling
Military-grade Free Piston Stirling cooling technology delivers highly efficient and compressor-free ultra-low temperature refrigeration. ➤ Military-grade Free Piston Stirling cooling technology delivers highly efficient and compressor-free ultra-low temperature refrigeration.
Provides dependable storage and transportation of biological samples, pharmaceuticals, vaccines, and other temperature-sensitive materials. ➤ Provides dependable storage and transportation of biological samples, pharmaceuticals, vaccines, and other temperature-sensitive materials.
Reaches temperatures as low as -60°C, making it suitable for demanding cold-chain applications. ➤ Reaches temperatures as low as -60°C, making it suitable for demanding cold-chain applications.
Compact and lightweight construction enables convenient transport between laboratories, healthcare facilities, and field locations. ➤ Compact and lightweight construction enables convenient transport between laboratories, healthcare facilities, and field locations.
Rapid cooling performance minimizes sample exposure time and preserves sample integrity. ➤ Rapid cooling performance minimizes sample exposure time and preserves sample integrity.
Maintains a stable internal environment for reliable long-term storage of valuable specimens. ➤ Maintains a stable internal environment for reliable long-term storage of valuable specimens.
Compatible with both AC mains power and DC vehicle power, allowing seamless laboratory and mobile operation. ➤ Compatible with both AC mains power and DC vehicle power, allowing seamless laboratory and mobile operation.
Uses 100% natural helium refrigerant, offering an environmentally friendly cooling solution. ➤ Uses 100% natural helium refrigerant, offering an environmentally friendly cooling solution.
High-performance vacuum insulation technology minimizes heat transfer and enhances energy efficiency. ➤ High-performance vacuum insulation technology minimizes heat transfer and enhances energy efficiency.
Low-noise operation ensures minimal disturbance in laboratory and clinical environments. ➤ Low-noise operation ensures minimal disturbance in laboratory and clinical environments.
Precision temperature control provides consistent storage conditions for sensitive materials. ➤ Precision temperature control provides consistent storage conditions for sensitive materials.
Lockable lid and integrated alarm system enhance sample safety during storage and transportation. ➤ Lockable lid and integrated alarm system enhance sample safety during storage and transportation.
Maintenance-friendly Stirling cooling engine features a simple structure with a long operational life. ➤ Maintenance-friendly Stirling cooling engine features a simple structure with a long operational life.
Ideal for pharmaceutical cold-chain logistics, biotechnology laboratories, clinical research, blood banks, vaccine distribution, and environmental sample transportation. ➤ Ideal for pharmaceutical cold-chain logistics, biotechnology laboratories, clinical research, blood banks, vaccine distribution, and environmental sample transportation.
Designed for reliable performance in laboratory, industrial, and field applications requiring portable ultra-low temperature storage. ➤ Designed for reliable performance in laboratory, industrial, and field applications requiring portable ultra-low temperature storage.

Biological Sample Storage:Provides reliable ultra-low temperature preservation of biological specimens, tissues, and research samples Biological Sample Storage
Provides reliable ultra-low temperature preservation of biological specimens, tissues, and research samples
Pharmaceutical Cold Chain:Ensures safe storage and transportation of pharmaceuticals, vaccines, biologics, and temperature-sensitive medicines Pharmaceutical Cold Chain
Ensures safe storage and transportation of pharmaceuticals, vaccines, biologics, and temperature-sensitive medicines
Clinical Laboratories:Maintains the integrity of clinical specimens during storage and transport for diagnostic and research applications Clinical Laboratories
Maintains the integrity of clinical specimens during storage and transport for diagnostic and research applications
Biotechnology Research:Supports the preservation of DNA, RNA, proteins, enzymes, cell cultures, and other sensitive biomaterials Biotechnology Research
Supports the preservation of DNA, RNA, proteins, enzymes, cell cultures, and other sensitive biomaterials
Blood Banks:Facilitates the temporary storage and transportation of plasma, blood components, and laboratory reagents under controlled conditions Blood Banks
Facilitates the temporary storage and transportation of plasma, blood components, and laboratory reagents under controlled conditions
Medical & Healthcare Facilities:Provides dependable cold storage for patient samples, diagnostic materials, and critical medical supplies Medical & Healthcare Facilities
Provides dependable cold storage for patient samples, diagnostic materials, and critical medical supplies
Research Institutes & Universities:Ideal for laboratory experiments requiring stable ultra-low temperature conditions for valuable research specimens Research Institutes & Universities
Ideal for laboratory experiments requiring stable ultra-low temperature conditions for valuable research specimens
Field Research & Environmental Monitoring:Enables secure preservation of environmental, agricultural, and ecological samples collected from remote locations Field Research & Environmental Monitoring
Enables secure preservation of environmental, agricultural, and ecological samples collected from remote locations
Industrial Temperature Testing:Suitable for industrial low-temperature simulation and testing of materials requiring controlled ultra-low temperature environments Industrial Temperature Testing
Suitable for industrial low-temperature simulation and testing of materials requiring controlled ultra-low temperature environments
Portable Cold Chain Logistics:Designed for mobile transportation of temperature-sensitive products while maintaining an uninterrupted cold chain Portable Cold Chain Logistics
Designed for mobile transportation of temperature-sensitive products while maintaining an uninterrupted cold chain
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