Meling Biomedical DW-XL668 -15°C to -30°C Front-Ventilated Upright Biomedical Freezer, 23.6 cu. ft. (668 L)

The Meling Biomedical DW-XL668 is a high-capacity 23.6 cu. ft. (668 L) upright biomedical freezer designed for controlled storage of temperature-sensitive materials between -15°C and -30°C. Its front-breathing ventilation design is tailored for the North American market, helping the freezer maintain refrigeration performance in professional facilities where rear or side clearance may be limited. The freezer is suitable for laboratories, pharmacies, hospitals, clinics, research facilities, biobanks, and pharmaceutical environments requiring organized frozen storage for enzymes, biologics, plasma, medicines, and other temperature-sensitive materials.

Certifications

• UL certified for applicable United States safety requirements
• cUL certified for applicable Canadian safety requirements

The microprocessor controller provides clear digital temperature monitoring through a digital LED display with 0.1°C display accuracy. Direct cooling and manual defrost support controlled low-temperature storage, while R290 hydrocarbon refrigerant, 80 mm cabinet insulation, TPE double door sealing, and a heated vacuum relief port help support stable and efficient freezer performance.

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

• 23.6 cu. ft. (668 L) storage capacity
• Adjustable operating range from -15°C to -30°C
• Upright biomedical freezer configuration
• Front-breathing ventilation tailored for North American installations
• Designed to support installation where side or rear clearance may be limited
• 860 mm, approximately 33.8 inches, pass-through cabinet dimension for easier movement through standard facility access points
• 180° maximum door opening angle for convenient loading and unloading
• Microprocessor temperature controller
• Digital LED display with 0.1°C display accuracy
• Built-in data logger with automatic or manual query, record, and download functions
• USB data export
• Data recording every 10 minutes
• Up to 12 months of locally stored temperature records
• Direct-cooling refrigeration system
• Manual defrost
• R290 hydrocarbon refrigerant, 150 g
• Energy consumption tested under Energy Star laboratory-grade freezer conditions
• TPE double door seal
• Heated vacuum relief port for easier door reopening
• Overhanging LED interior light
• Ergonomic handle design
• Four adjustable wire shelves
• Shelf maximum loading capacity of 45 kg
• Sprayed aluminum plate interior
• Carbon steel coated plate exterior
• 23 mm access port for an independent probe or compatible monitoring equipment
• Remote alarm contact
• RS485 communication interface
• Backup battery support for over 48 hours
• Four heavy-duty casters with two leveling feet and two brakes
• Optional inkless chart recorder
• Optional freezing box
• Optional 304 stainless-steel side-access freezing racks
• Optional rack configuration for up to 16 racks and 400 freezer boxes

Temperature Performance

Manufacturer testing reports:

• Temperature uniformity of approximately 2.0°C
• Pull-down time to -30°C of approximately 1.89 hours
• Peak variance of approximately 3.4°C

The brochure states that testing was performed under Energy Star laboratory-grade freezer standards. Actual performance may vary depending on cabinet loading, ambient conditions, installation, ventilation, initial product temperature, door-opening frequency, and power supply conditions.

Front-Breathing Design for North American Installations

The DW-XL668 uses a front-breathing ventilation layout, with airflow managed through the lower front ventilation area. This design is tailored for the North American market, where laboratories, pharmacies, hospitals, and research facilities often place equipment within built-in casework, equipment rows, or narrow utility spaces.

By reducing dependence on side or rear ventilation clearance, the front-ventilated design helps facilities plan installations more easily while supporting the refrigeration performance required for professional biomedical freezer storage.

Comprehensive Alarm Protection

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

• High cabinet temperature
• Low cabinet temperature
• High ambient temperature
• Power failure
• Low backup-battery level
• Temperature-sensor error
• Main-board communication error
• High condenser temperature
• Door-ajar condition
• Data-logger failure
• Data-logger alarm condition

These alarms help personnel identify temperature excursions, electrical interruptions, open-door conditions, condenser-related 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 12 months of records. Authorized users can query, record, and download stored temperature data for documentation, audits, quality-control procedures, and local recordkeeping.

The RS485 communication 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 data logger. RS485 communication and remote alarm-contact functionality remain available for compatible on-site systems.

Designed for Organized High-Capacity Storage

The DW-XL668 provides 23.6 cu. ft. (668 L) of frozen storage in a single-door upright cabinet. Four adjustable shelves support flexible storage of biomedical materials, while optional stainless-steel side-access racks and freezer boxes allow the cabinet to be configured for high-density sample storage.

The combination of large capacity, front-breathing ventilation, local data logging, backup battery support, remote alarm contact, RS485 interface, heated vacuum relief, alarm protection, and UL/cUL certification makes the DW-XL668 suitable for professional facilities that require secure, documented, and space-conscious frozen storage.

Main Specifications

• Model: DW-XL668
• Product type: Front-ventilated upright biomedical freezer
• Capacity: 23.6 cu. ft. (668 L)
• Temperature range: -15°C to -30°C
• Recommended ambient temperature: 16°C to 32°C
• Climate class: N
• Controller: Microprocessor
• Display: Digital LED display
• Display accuracy: 0.1°C
• Noise level: 51.7 dB(A)
• Compressor: One
• Cooling method: Direct cooling
• Defrost method: Manual
• Refrigerant: R290, 150 g
• Insulation thickness: 80 mm at the door, left and right sides, and back
• Exterior material: Carbon steel coated plate
• Interior material: Sprayed aluminum plate
• Shelves: Four adjustable wire shelves
• Shelf maximum loading capacity: 45 kg
• Access port: One, 23 mm in diameter
• Mobility: Four casters with two leveling feet and two brakes
• Data-recording interval: Every 10 minutes
• Local record retention: Up to 12 months
• Data export: USB
• Communication interfaces: RS485 and remote alarm contact
• Backup battery: Included, over 48 hours
• Optional chart recorder: Inkless chart recorder
• Optional storage accessories: Freezing box and freezing rack
• Specified rack model: ZKL304-552B-CT
• Specified rack dimensions: 140 x 685 x 293 mm
• Specified freezer box dimensions: 133 x 133 x 53 mm
• Specified rack capacity: 16 racks
• Specified box capacity: Up to 400 boxes
• Internal dimensions, W x D x H: 700 x 715 x 1,296 mm
• External dimensions, W x D x H: 883 x 890 x 1,936 mm
• Packaged dimensions, W x D x H: 938 x 1,018 x 2,086 mm
• Net weight: 154 kg
• Gross weight: 193 kg
• North American electrical supply: 110 V, 60 Hz
• Rated current at 110 V: 3.68 A
• International electrical supply: 220 to 240 V, 50/60 Hz
• Rated current at 220 to 240 V: 3.0 A