Meling Biomedical DW-HL530 −40°C to −86°C Dual-Cooling Upright Ultra-Low Temperature Freezer 530 L

The Meling Biomedical DW-HL530 is a 530 L upright ultra-low temperature freezer engineered for long-term storage of temperature-sensitive biological materials between −40°C and −86°C. Its dual-cooling architecture uses two independent inverter-driven refrigeration systems to provide an additional level of sample protection. The freezer also incorporates a 10-inch intelligent touchscreen, stainless-steel interior, vacuum-insulated cabinet construction, local temperature data logging, biometric access control, and comprehensive alarm protection for research laboratories, biobanks, hospitals, pharmaceutical facilities, and other professional environments.

Certifications

• Class II medical-device CE certified, with conformity to applicable IEC/EN 61010 electrical safety requirements
• UL certified for applicable United States safety requirements
• cUL certified for applicable Canadian safety requirements

The microprocessor controller and 10-inch HD intelligent touchscreen provide clear access to cabinet temperature, operating status, alarm conditions, and stored records. Two independent inverter compressors adjust refrigeration output according to demand, while direct cooling, hydrocarbon refrigerants, vacuum-insulated panels, and substantial cabinet insulation support controlled operation down to −86°C.

Key Features

• 530 L / 18.7 cu. ft. storage capacity

• Adjustable operating range from −40°C to −86°C

• Dual independent refrigeration systems

• Two inverter-driven compressors

• Redundant cooling architecture for enhanced protection of high-value materials

• 10-inch HD intelligent touchscreen

• Microprocessor temperature controller

• Direct-cooling refrigeration

• Manual defrost

• Hydrocarbon refrigerants

• Vacuum-insulated panel construction

• Stainless-steel interior

• Three stainless-steel shelves

• Insulated inner doors to reduce heat entry during routine access

• Ergonomic door handle

• Card and fingerprint access control

• Heated vacuum-relief port to assist with door reopening

• Built-in USB temperature data logger

• Temperature recording every five minutes

• Local record retention for up to ten years

• 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 heavy-duty casters and two leveling feet

Dual-System Sample Protection

The DW-HL530 is built around two independent refrigeration systems. The manufacturer states that if one system becomes unavailable, the remaining refrigeration system can continue maintaining ultra-low cabinet conditions at approximately −80°C under specified operating conditions.

This redundant design is intended to provide additional response time and sample protection compared with a conventional single-system freezer. Independent facility monitoring and an established emergency-transfer plan should still be maintained for irreplaceable or high-value materials.

Temperature Performance

Manufacturer internal testing reports:

• Temperature recovery of approximately 24.5 minutes after the door has been opened for one minute

• Pull-down time to −80°C of approximately 185 minutes

• Daily energy consumption of approximately 7.3 kWh

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, voltage, initial product temperature, door-opening frequency, and individual unit configuration.

Comprehensive Alarm Protection

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

• High cabinet temperature

• Low cabinet temperature

• High ambient temperature

• Temperature-sensor failure

• Power failure

• Low backup-battery level

• Ambient-temperature sensor failure

• Backup-battery power-check failure

• Local data-communication failure

• Door-opening timeout

• A/B refrigeration-system fault

• High refrigeration-system pressure

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

Local Temperature Data Management

The integrated data logger records cabinet temperature locally at five-minute intervals and supports retention of up to ten years of historical records. Authorized users can export stored information directly through the USB port for audits, quality-control procedures, documentation, 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 and alarm records remain stored locally within the freezer and can be accessed or exported through the integrated USB data logger. RS485 communication and remote alarm-contact functionality remain available for compatible on-site systems.

Designed for High-Volume, High-Value Storage

The DW-HL530 accommodates a specified configuration of up to sixteen freezer racks and approximately 400 standard storage boxes. Its three-shelf stainless-steel interior and insulated inner-door arrangement divide the cabinet into organized storage zones while reducing exposure of materials that are not being accessed.

The combination of dual independent cooling systems, touchscreen control, biometric access, local temperature documentation, vacuum insulation, comprehensive alarms, and secure cabinet construction makes the freezer suitable for professional facilities managing valuable or difficult-to-replace biological collections.

Main Specifications

• Model: DW-HL530

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

• Capacity: 530 L / 18.7 cu. ft.

• 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: 10-inch HD intelligent touchscreen

• Compressors: Two inverter-driven compressors

• Refrigeration systems: Two independent systems

• Cooling method: Direct cooling

• Defrost method: Manual

• Refrigerant: Hydrocarbon refrigerants

• Insulation: Vacuum-insulated panels with supplementary cabinet insulation

• Insulation thickness: Approximately 117 mm at the door and 130 mm at the side walls and rear

• Exterior material: Cold-rolled steel

• Interior material: Stainless steel

• Shelves: Three stainless-steel shelves

• Inner-door configuration: Insulated inner doors

• Access control: Card and fingerprint access

• Access ports: Two, each 25 mm in diameter

• Mobility: Four casters and two leveling feet

• Data-recording interval: Every five minutes

• Local record retention: Up to ten years

• Data export: USB

• Communication interfaces: RS485 and remote alarm contact

• Backup battery: Included

• Specified rack model: ZKL304-552B-CT

• Specified rack capacity: 16 racks

• Specified box capacity: Up to 400 boxes

• Internal dimensions, W × D × H: 585 × 696 × 1,266 mm

• External dimensions, W × D × H: 930 × 1,041 × 1,947 mm

• Packaged dimensions, W × D × H: 1,005 × 1,160 × 2,132 mm

• Net weight: 276 kg

• Gross weight with paper packaging: 332 kg

• Gross weight with wooden packaging: 365 kg

• Electrical supply: 110–230 V, 50/60 Hz

• Rated current: 13.42 A