Meling Biomedical DW-FL90 −20°C to −40°C Undercounter Ultra-Low Temperature Freezer 90 L

The Meling Biomedical DW-FL90 is a compact 90 L ultra-low temperature freezer designed for controlled storage of temperature-sensitive materials between −20°C and −40°C. Its undercounter cabinet combines three removable ABS drawers, microprocessor temperature control, integrated local data logging, comprehensive alarm protection, and a secure solid-door design. The compact footprint is well suited to laboratories, research facilities, clinics, pharmacies, and other professional environments where floor space is limited.

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 cabinet-warming cycles associated with automatic defrost systems. The freezer uses R290 hydrocarbon refrigerant and is designed to operate in ambient temperatures from 16°C to 32°C.

Key Features

• 90 L / 3.18 cu. ft. storage capacity

• Undercounter cabinet design

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

• Microprocessor temperature controller

• Digital display with 0.1°C temperature increments

• Three removable ABS storage drawers

• Direct-cooling refrigeration system

• Manual defrost

• R290 hydrocarbon refrigerant

• Solid foam-insulated door

• Key-operated safety lock

• 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

• 23 mm access port for an independent probe or monitoring equipment

• Circuit breaker for electrical protection

• Two casters and two levelling feet for positioning and stabilization

Temperature Performance

Manufacturer internal testing reports:

• Temperature uniformity of approximately 1.5°C

• Pull-down time to −40°C of approximately 1.13 hours

• Temperature recovery time of approximately 0.3 hours after the 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, installation, ventilation, ambient conditions, 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, open-door conditions, power interruptions, 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 Space-Conscious Facilities

The DW-FL90 provides −40°C storage capability in a compact cabinet that can fit beneath many standard laboratory counters and work surfaces. Three internal ABS drawers help organize materials by project, department, sample type, or storage period while reducing exposure of the remaining contents during routine access.

Its combination of secure storage, local temperature documentation, backup monitoring, alarm protection, and compact dimensions makes it suitable for facilities requiring dedicated low-temperature storage without installing a full-height freezer.

Main Specifications

• Model: DW-FL90

• Product type: Undercounter ultra-low temperature freezer

• Capacity: 90 L / 3.18 cu. ft.

• 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

• Compressor: One

• Refrigerant: R290

• Exterior material: Pre-coated metal

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

• Storage configuration: Three ABS drawers

• First drawer dimensions, W × D × H: 494 × 260 × 181 mm

• Second and third drawer dimensions, W × D × H: 494 × 419 × 165 mm

• Door type: Solid foam-insulated door

• Access port: One, 23 mm in diameter

• Mobility: Two casters and two levelling feet

• 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, W × D × H: 500 × 485 × 532 mm

• External dimensions, W × D × H: 660 × 645 × 815 mm

• Packaged dimensions, W × D × H: 722 × 697 × 890 mm

• Net weight: 54 kg

• Gross weight: 67 kg

• North American electrical supply: 110 V, 60 Hz

• Rated current at 110 V: 4.19 A