Meling Biomedical DW-FL450 −20°C to −40°C Dual-Compartment Upright Ultra-Low Temperature Freezer 450 L

The Meling Biomedical DW-FL450 is a 450 L upright ultra-low temperature freezer designed for controlled storage of temperature-sensitive materials between −20°C and −40°C. Its dual-compartment cabinet provides two separately accessible storage sections containing twelve removable ABS drawers, helping facilities organize inventory while limiting unnecessary exposure of the entire cabinet during routine access. The freezer combines microprocessor temperature control, a dual-compressor refrigeration system, integrated local temperature recording, comprehensive alarm protection, and secure solid-door construction for professional laboratory, research, clinical, and institutional environments.

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 clear digital temperature monitoring with adjustments displayed in 0.1°C increments. Direct cooling and manual defrost support controlled low-temperature operation without the periodic cabinet-warming cycles associated with automatic-defrost systems. Two compressors support the dual-compartment refrigeration design, while R290 hydrocarbon refrigerant is used throughout the system.

Key Features

• 450 L storage capacity

• Dual-compartment upright cabinet with two separately accessible storage sections

• Twelve removable ABS drawers, with six drawers in each compartment

• Two-compressor refrigeration system

• Adjustable operating range from −20°C to −40°C

• Microprocessor temperature controller

• Digital temperature display

• Temperature adjustments in 0.1°C increments

• Direct-cooling refrigeration system

• Manual defrost

• R290 hydrocarbon refrigerant

• Two solid foam-insulated doors

• Key-operated safety locks for controlled access

• Spray-coated aluminum interior

• Optional stainless-steel interior configuration

• 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

• Two 25 mm access ports for independent probes or compatible monitoring equipment

• Circuit breaker for electrical protection

• Four casters, including two braking casters, for positioning and stabilization

Temperature Performance

Manufacturer internal testing reports:

• Upper-compartment temperature uniformity of approximately 2.0°C

• Lower-compartment temperature uniformity of approximately 1.7°C

• Pull-down time to −40°C of approximately 2.1 hours

• Temperature recovery time of approximately 0.7 hours after a door has been opened for one minute

These figures are based on manufacturer internal testing with the freezer set to −40°C and operated at an ambient temperature of 22°C. Actual performance may vary depending on cabinet loading, ambient conditions, installation, ventilation, initial product temperature, 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

• Power failure

• Low backup-battery level

• Temperature-sensor error

• Door-ajar condition

• Data-logger failure

• Local data-communication failure

These alarms help personnel identify temperature excursions, electrical interruptions, open-door conditions, and monitoring-system 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 monitoring equipment, alarm panels, 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 High-Volume Storage

The DW-FL450’s two-door, dual-compartment configuration allows personnel to access one storage section without opening the other. Twelve individual drawers support separation by department, project, material type, sample category, or storage period while reducing exposure of materials that are not being accessed.

The combination of dual-compartment organization, solid insulated doors, safety locks, local data logging, backup monitoring, and comprehensive alarms makes the freezer suitable for professional facilities requiring secure, organized, and documented −40°C storage.

Main Specifications

• Model: DW-FL450

• Product type: Dual-compartment upright ultra-low temperature freezer

• Capacity: 450 L

• Temperature range: −20°C to −40°C

• Cooling performance: −40°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

• Compressors: Two

• Refrigerant: R290

• Insulation thickness: 76 mm at the doors; 80 mm at the side walls and back

• Exterior material: Pre-coated metal

• Interior material: Spray-coated aluminum; stainless steel optional

• Storage configuration: Twelve ABS drawers

• Upper compartment: Six drawers

• Lower compartment: Six drawers

• Door configuration: Two solid foam-insulated doors

• Access ports: Two, each 25 mm in diameter

• Mobility: Four casters, including two braking 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

• Internal dimensions per compartment, W × D × H: 650 × 570 × 627 mm

• External dimensions, W × D × H: 856 × 789 × 1,960 mm

• Packaged dimensions, W × D × H: 960 × 870 × 2,144 mm

• Net weight: 144 kg

• Gross weight: 172 kg

• North American electrical supply: 110 V, 60 Hz

• Rated current at 110 V: 5.26 A