Meling Biomedical DW-HL50 -40°C to -86°C Undercounter Ultra-Low Temperature Freezer, 1.77 cu. ft. (50 L)

The Meling Biomedical DW-HL50 is a compact 1.77 cu. ft. (50 L) ultra-low temperature freezer designed for long-term storage of temperature-sensitive biological materials between -40°C and -86°C. Its undercounter cabinet combines a stainless-steel interior, insulated inner door, microprocessor temperature control, mixed-refrigerant refrigeration system, local USB temperature logging, comprehensive alarm protection, and secure solid-door construction. The compact configuration is suitable for laboratories, research facilities, biobanks, clinical environments, and other professional facilities requiring dedicated ultra-low temperature storage close to the point of use.

Certifications

• UL certified for applicable United States safety requirements
• cUL certified for applicable Canadian safety requirements
• CE marked for conformity with applicable European requirements

The microprocessor controller provides continuous digital temperature monitoring with readings displayed in 0.1°C increments. A direct-cooling, mixed-refrigerant refrigeration system supports operation down to -86°C, while manual defrost, substantial cabinet insulation, and an insulated inner door help reduce heat entry and maintain ultra-low temperature conditions during routine storage.

Meling Biomedical Brand Heritage

Meling Biomedical is backed by Zhongke Meiling, a specialist life-science and cold-chain manufacturer founded in 2002 through Changhong Meiling and the Chinese Academy of Sciences. The company is recognized as a National High-Tech Enterprise and is documented as the first manufacturer in China to produce ultra-low temperature freezers, pioneering high-efficiency mixed-refrigerant technology for biomedical cold storage. With products and services supplied to more than 140 countries and regions, Meling Biomedical brings the technical foundation of an established Chinese premium cold-storage brand to laboratories, pharmacies, hospitals, biobanks, pharmaceutical facilities, vaccine-storage programs, and research institutions worldwide.

Key Features

• 1.77 cu. ft. (50 L) ultra-low temperature storage capacity
• Adjustable operating range from -40°C to -86°C
• Compact undercounter configuration
• Microprocessor temperature controller
• Digital display with 0.1°C temperature increments
• Direct-cooling refrigeration system
• Mixed-refrigerant system
• Manual defrost
• Single-compressor refrigeration design
• Stainless-steel interior
• One stainless-steel storage shelf
• Insulated inner door for additional thermal protection
• Solid insulated exterior door
• Ergonomic door handle
• Secure mechanical door lock
• Built-in USB temperature data logger
• Local storage for up to 100,000 temperature records
• RS485 communication interface
• Remote alarm contact
• Backup battery for continued local monitoring and alarm operation
• Optional CO2 backup system for additional sample protection
• 25 mm access port for an independent probe or compatible monitoring equipment
• Circuit breaker for electrical protection
• Four heavy-duty casters for positioning and relocation

Temperature Performance

Manufacturer internal testing reports:

• Pull-down time to -80°C of approximately 1.63 hours
• Temperature recovery time of approximately 0.24 hours after the door has been opened for one minute
• Cabinet insulation measuring up to approximately 110 mm, depending on the cabinet surface

These figures are based on manufacturer internal testing with the freezer set to -80°C and operated at an ambient temperature of 25°C. Actual performance may vary depending on cabinet loading, ambient conditions, installation, ventilation, initial product temperature, power supply, and door-opening frequency.

Comprehensive Alarm Protection

The integrated alarm system provides visual and audible notification for conditions including:

• High cabinet temperature
• Low cabinet temperature
• High ambient temperature
• High condenser temperature
• Power failure
• Low backup-battery level
• Temperature-sensor error
• Backup-battery power-detection failure
• Door-ajar condition
• Local data-communication failure

These alarms help personnel identify temperature excursions, electrical interruptions, open-door conditions, refrigeration-system conditions, and monitoring faults promptly.

Local Temperature Data Management

The built-in data logger records cabinet temperature locally at ten-minute intervals and can retain up to 100,000 temperature records. Authorized users can export stored records directly through the USB port for documentation, audits, quality-control procedures, and local recordkeeping.

The RS485 interface and remote alarm contact can connect the freezer to compatible on-site alarm panels, monitoring equipment, or building-management systems without requiring an internet connection.

Privacy-Focused Offline Operation

Internet connectivity, cloud communication, and external manufacturer-server data collection are disabled to support institutional privacy, cybersecurity, and data-governance requirements.

Temperature records remain stored locally within the freezer and can be accessed or exported directly through the built-in USB data logger. RS485 communication and remote alarm-contact functionality remain available for compatible on-site systems.

Designed for Space-Conscious Facilities

The DW-HL50 provides true -86°C storage capability in a compact cabinet measuring approximately 757 mm high. Its undercounter format allows laboratories to place dedicated ultra-low temperature storage near workstations, testing areas, or frequently accessed sample collections without installing a full-height ULT freezer.

The insulated inner door helps reduce heat entry when the exterior door is opened, while the stainless-steel interior, secure lock, local data logger, backup battery, comprehensive alarms, mixed-refrigerant refrigeration system, and optional CO2 backup system support professional long-term sample-storage workflows.

Main Specifications

• Model: DW-HL50
• Product type: Undercounter ultra-low temperature freezer
• Capacity: 1.77 cu. ft. (50 L)
• Temperature range: -40°C to -86°C
• Cooling performance: -86°C
• Recommended ambient temperature: 16°C to 32°C
• Climate class: N
• Controller: Microprocessor
• Display: Digital temperature display
• Display resolution: 0.1°C increments
• Cooling method: Direct cooling
• Defrost method: Manual
• Compressor: One
• Refrigerant: Mixed refrigerant
• Insulation thickness: Approximately 76 mm at the door and approximately 110 to 111 mm at the side walls and rear
• Exterior material: Cold-rolled steel
• Interior material: Stainless steel
• Storage configuration: One stainless-steel shelf
• Inner-door configuration: Insulated inner door
• Access port: One, 25 mm in diameter
• Mobility: Four heavy-duty casters
• Data-recording interval: Every 10 minutes
• Data-storage capacity: Up to 100,000 records
• Data export: USB
• Communication interfaces: RS485 and remote alarm contact
• Backup battery: Included
• CO2 backup system: Optional
• Internal dimensions, W x D x H: 305 x 425 x 430 mm
• External dimensions, W x D x H: 951 x 700 x 757 mm
• Packaged dimensions, W x D x H: 1,045 x 770 x 932 mm
• Net weight, 110 V version: 96 kg
• Gross weight, 110 V version: 116 kg
• North American electrical supply: 110 V, 60 Hz
• Rated current at 110 V: 10 A