A vertical ultra-low temperature freezer in an undercounter format, engineered specifically for personal and benchtop-adjacent storage in clinical, medical, scientific research, quarantine, and space-constrained laboratory environments. At a maximum height of 810 mm — fitting under standard laboratory benches —, with a stackable design, high-performance HC refrigeration system, 5.5 kWh/24 h energy consumption in the DW-86L100J model, and CE and UL certifications, the series combines personal-use convenience with full ULT storage performance at −86°C.

The hydrocarbon (HC) refrigeration system is optimized for maximum energy efficiency in a compact format, achieving just 5.5 kWh/24 h on the 100 L model — the efficiency benchmark for undercounter ULT freezers. The adjustable temperature range is −40°C to −86°C, with a pull-down time from ambient to −80°C of 310 minutes and a natural warm-up time from −80°C to −50°C of 120 minutes at 25°C ambient. Temperature uniformity is ±4°C. The low-GWP HC refrigerant eliminates high-GWP fluorinated compounds.

The microprocessor controller with LED display shows cabinet temperature, ambient temperature, and input voltage in real time at 0.1°C precision. Two standard temperature porthole access points allow independent internal temperature monitoring without opening the door. The dual independent insulated inner doors on the DW-86L100J minimize cold loss during main door opening, protecting stored specimens. The ergonomic handle enables easy single-hand door opening — a key feature for frequent bench routine use.

Security is provided by an exclusive key lock and a complete audio-visual alarm system: high temperature, low temperature, sensor fault, power failure, low battery, and door ajar. The standard USB port stores over 15 years of operational data for traceability and regulatory compliance. The unit also includes RS485 interface and a 5V power port as standard. Four casters and two foot locks provide easy mobility and secure leveling.

Technical Specifications

Key Features

• 810 mm cabinet height — fits under standard laboratory benches without modification

• Stackable design to maximize vertical space utilization

• Just 5.5 kWh/24 h energy consumption (DW-86L100J) — efficiency benchmark for undercounter ULT freezers

• Low-GWP HC refrigerant: zero high-GWP fluorinated compounds

• Dual independent insulated inner doors (DW-86L100J) to minimize cold loss per access

• Two standard temperature portholes for independent internal monitoring without door opening

• Ergonomic handle for easy one-hand opening

• LED display at 0.1°C precision showing temperature, ambient temperature, and voltage

• USB port with >15-year operational data storage capacity

• Standard RS485 interface and 5V power port

• 4 casters + 2 foot locks for easy mobility and leveling

• Complete audio-visual alarm system: 6 types including low battery and door ajar

• CE and UL certified on both models

Applications

The DW-86L51J and DW-86L100J are designed for researchers, technicians, and clinicians requiring personal ULT storage at −86°C adjacent to their workbench — without depending on large shared floor-standing freezers in distant corridors or storage rooms. They are especially suited for clinical, medical, scientific research, hemotherapy, quarantine, bioengineering, industrial chemistry, and electronics laboratories operating in compact spaces with standard-height workbenches.

The stackable design and dual CE/UL certification also make the models appropriate for institutions seeking to expand ULT storage capacity through vertical stacking or multiple distributed bench units, while maintaining regulatory compliance for both the European and North American markets.