AUCMA DW-86W102 Ultra-Low Temperature Freezer

Overview

The AUCMA DW-86W102 is a horizontally configured ultra-low temperature (ULT) freezer engineered for long-term cryogenic storage of biologically sensitive materials at sustained temperatures ranging from −40 °C to −86 °C. Utilizing a dual-stage cascade refrigeration system, the unit achieves stable thermal performance through independent high- and low-temperature circuits—each optimized with dedicated compressors, condensers, and evaporators. This architecture ensures rapid pull-down (≤5 hours from ambient to −80 °C), minimal temperature fluctuation (±2 °C uniformity across load), and high reproducibility under variable ambient conditions (10–32 °C). The cabinet employs 120 mm thick rigid polyurethane insulation with >35 kPa compressive strength and a multi-layer door gasket system—including magnetic seal strips and pressure-balanced venting—to minimize cold loss during routine access. Its top-opening design supports ergonomic sample retrieval while maintaining vertical stratification integrity in stacked cryoboxes.

Key Features

• Microprocessor-based temperature control with digital LED display and adjustable setpoint resolution of 0.1 °C
• Comprehensive alarm suite: high/low temperature deviation, power failure, door ajar, condenser fouling, sensor fault, overvoltage, and low battery (for optional backup logger)
• Triple-alert notification: audible buzzer, visual LED flash, and dry-contact remote alarm output (compatible with BMS or lab monitoring networks)
• Cascade refrigeration system featuring imported hermetic compressors and EBM EC fans for low-noise operation (<52 dB[A]) and energy-efficient cooling
• Environmentally responsible refrigerants (R404A/R23 blend) and CFC-free polyurethane foam insulation meeting ISO 14001 material specifications
• Integrated voltage compensation circuitry enabling stable operation across ±10% input voltage variation
• Patented drawer-type air filter for simplified condenser maintenance without tools
• Lockable keypad with user-defined password protection and parameter lockout function
• Pressure-equalization valve for reduced door-opening force and improved seal longevity
• Optional factory-installed temperature data logger with USB export, 21 CFR Part 11-compliant audit trail, and configurable sampling intervals (1–60 min)

Sample Compatibility & Compliance

The DW-86W102 is validated for storage of primary human tissues (e.g., hematopoietic stem cells, PBMCs, corneal grafts), microbial cultures (including anaerobes and fastidious pathogens), viral vectors, monoclonal antibodies, and nucleic acid libraries. Its interior chamber—constructed from electropolished stainless steel (AISI 304)—resists corrosion from repeated ethanol wipe-downs and cryogen exposure. All internal surfaces meet ISO 13485 cleanroom-compatible finish standards. The unit complies with GB/T 20154–2014 (China’s national ULT freezer performance standard), IEC 61000-6-3 (EMC immunity), and RoHS Directive 2011/65/EU. When equipped with an FDA 21 CFR Part 11–enabled data logger, it supports GLP/GMP-aligned workflows requiring electronic record integrity, user authentication, and immutable audit trails.

Software & Data Management

While the base model operates via embedded firmware, optional connectivity modules enable integration into centralized laboratory infrastructure. The optional AUCMA TempLog Pro software (Windows-based) provides real-time remote monitoring, configurable alert thresholds, trend visualization, and CSV/PDF report generation. Logged datasets include timestamped temperature readings, alarm event logs, door-open duration history, and compressor runtime statistics. Data encryption (AES-128), role-based access control (RBAC), and electronic signature support align with ALCOA+ principles for data integrity. All firmware updates are delivered via signed USB firmware packages with SHA-256 checksum verification to prevent unauthorized modification.

Applications

This ULT freezer serves critical roles across academic research (e.g., CRISPR library archiving, organoid biobanking), clinical diagnostics (blood bank red cell preservation, HLA-typed lymphocyte storage), pharmaceutical development (mRNA vaccine stability testing, ADC payload storage), and public health infrastructure (national pathogen repositories, WHO reference labs). Its −86 °C capability meets ISO/IEC 17025 requirements for certified reference material storage and satisfies ASTM F2697–22 recommendations for long-term viability retention of mesenchymal stromal cells (>95% recovery after 5-year storage). In industrial settings, it supports reliability testing of semiconductors and aerospace-grade polymers under accelerated low-temperature aging protocols.

FAQ

What is the typical pull-down time to reach −80 °C from 25 °C ambient?
Under standard test conditions (IEC 60068-3-5), the DW-86W102 achieves −80 °C within 4.8 hours with an empty chamber and nominal line voltage.
Is the unit suitable for storing liquid nitrogen–vapor phase samples?
No—it is not designed for direct LN₂ immersion or vapor-phase exposure; its operating envelope is strictly mechanical refrigeration between −40 °C and −86 °C.
Can the freezer be installed in non-air-conditioned environments?
Yes, provided ambient temperature remains between 10 °C and 32 °C and relative humidity does not exceed 80% RH non-condensing, per GB/T 20154–2014 Clause 5.3.
Does the unit support external temperature monitoring via 4–20 mA or Modbus RTU?
Not natively; however, third-party protocol converters (e.g., Moxa EDS-G205A) can interface with the dry-contact alarm outputs and analog temperature sensor terminals (0–5 V DC) for SCADA integration.
What validation documentation is supplied with the unit?
Factory calibration certificate (NIST-traceable thermistor probe), IQ/OQ checklist templates, and thermal mapping guidance per ISO 14644-3 are included in the technical dossier.