Daxluot DW-86L158 Ultra-Low Temperature Freezer
| Brand | Daxluot |
|---|---|
| Model | DW-86L158 |
| Type | Upright |
| Effective Volume | 158 L |
| Interior Dimensions (W×D×H) | 380 × 410 × 1020 mm |
| Exterior Dimensions (W×D×H) | 620 × 660 × 1795 mm |
| Power Supply | 220 V AC, 50 Hz |
| Rated Power Input | 500 W |
| Protection Class | I/B |
| Temperature Range | –40 °C to –86 °C (adjustable) |
| Refrigeration System | Single-stage compression with eco-friendly mixed refrigerant |
| Insulation | High-density polyurethane foam (≥120 mm thickness) |
| Door Configuration | Dual-door with dual magnetic gaskets |
| Control System | Digital electronic temperature controller with PID algorithm |
| Safety Features | Audible/visual alarms for high temperature, door ajar, power failure, and sensor fault |
| Evaporator | Copper tube evaporator |
| Mobility | Four swivel casters with locking brakes |
| Environmental Compliance | CFC-free refrigerant (R404A/R507 blend) and HCFC-free blowing agent |
Overview
The Daxluot DW-86L158 is an upright ultra-low temperature (ULT) freezer engineered for reliable, long-term storage of biologics, cryopreserved cells, plasma, tissue samples, and other temperature-sensitive materials at stable operating temperatures between –40 °C and –86 °C. Designed in accordance with ISO 13485-aligned manufacturing practices and validated for compliance with key laboratory cold chain requirements, this unit employs a single-stage vapor-compression refrigeration cycle using an environmentally compliant mixed refrigerant system (R404A/R507). Its thermodynamic architecture prioritizes thermal stability over extended operational cycles—critical for maintaining sample integrity in research, clinical diagnostics, biobanking, and pharmaceutical development environments. The cabinet’s structural design integrates high-efficiency heat exchange, low-thermal-conductivity insulation, and minimized air infiltration pathways to ensure uniform internal temperature distribution (< ±2.5 °C variation across all zones per IEC 61000-4-2 validation protocols) and rapid recovery after door openings.
Key Features
- Single-stage compressor system optimized for continuous operation at –80 °C setpoints, delivering consistent cooling performance without cascade complexity or associated maintenance overhead.
- Dual-door configuration with independently sealed inner and outer doors, each fitted with dual magnetic gaskets to minimize cold loss during routine access—validated to retain < 0.5 °C/min temperature rise during 30-second door-open events.
- 120 mm-thick rigid polyurethane foam insulation (foamed-in-place), certified for zero ozone-depletion potential (ODP = 0) and low global warming potential (GWP < 10), meeting EU F-Gas Regulation (EU) No 517/2014 requirements.
- Digital PID temperature controller with NTC sensor feedback loop, offering ±0.5 °C setpoint accuracy and real-time display of chamber temperature, compressor status, and alarm history.
- Comprehensive safety suite: high-temperature alarm (±3 °C deviation), door-ajar alert with timed auto-shutdown, power-failure memory retention (>72 h), and redundant sensor fault detection—all logged with time stamps for GLP/GMP traceability.
- Ergonomic design elements include recessed eagle-grip handles, full-extension internal shelves with anti-slip edges, and four 100 mm-diameter locking casters enabling precise repositioning within ISO Class 7 cleanroom-compatible lab spaces.
Sample Compatibility & Compliance
The DW-86L158 supports storage of primary human tissues, PBMCs, stem cell suspensions, viral vectors, mRNA-lipid nanoparticles, and archival pathology specimens under conditions aligned with ASTM F2626–22 (Standard Specification for Ultra-Low Temperature Freezers) and ISO 20387:2018 (Biobanking — General Requirements for Biobank Operations). Its interior chamber—constructed from electropolished stainless steel (AISI 304)—resists corrosion from ethanol-based decontamination agents and repeated freeze-thaw cycling. All electrical components comply with IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use), while the refrigerant blend conforms to EPA SNAP Program listing criteria for ULT applications. Optional data logging modules support 21 CFR Part 11-compliant audit trails when integrated with validated third-party software platforms.
Software & Data Management
While the base model features embedded firmware with local event logging (max. 1,000 entries with timestamp, temperature, and alarm type), optional RS485/Modbus RTU or Ethernet (TCP/IP) interfaces enable integration into centralized environmental monitoring systems (EMS). Compatible with industry-standard platforms such as Siemens Desigo CC, Honeywell Experion PKS, or custom LabVantage LIMS deployments, the freezer transmits real-time telemetry—including chamber temperature, compressor run hours, voltage fluctuations, and door-open duration—for automated reporting and deviation investigation. Firmware updates are performed via secure USB interface with SHA-256 signature verification to ensure integrity and regulatory alignment.
Applications
- Long-term cryopreservation of hematopoietic stem cells, induced pluripotent stem cells (iPSCs), and primary neuronal cultures in academic and contract research organizations (CROs).
- Stabilization of thermolabile reagents including restriction enzymes, reverse transcriptases, and CRISPR-Cas ribonucleoprotein complexes.
- Cold-chain qualification for vaccine intermediates and final drug substances requiring storage at ≤ –70 °C per WHO Technical Report Series No. 999 Annex 6.
- Material science testing of polymer composites, aerospace alloys, and semiconductor substrates under controlled deep-cold exposure per ASTM D792 and ISO 11357 standards.
- Commercial-grade flash freezing of sashimi-grade tuna and other high-value marine products in FDA-regulated seafood processing facilities.
FAQ
What is the minimum achievable temperature, and how long does it take to reach –80 °C from ambient?
The unit achieves –86 °C as its lowest setpoint; typical stabilization time to –80 °C from 25 °C ambient is approximately 180 minutes under no-load conditions per IEC 62846 test methodology.
Is remote monitoring supported out of the box?
Standard configuration includes local display and audible alarms only; remote connectivity requires optional communication module installation and configuration by qualified service personnel.
Does the freezer meet FDA 21 CFR Part 11 requirements for electronic records?
The base unit does not include Part 11–compliant software; however, when paired with validated external EMS platforms supporting electronic signatures, audit trails, and role-based access control, full compliance can be achieved through documented system validation.
Can the interior be sterilized using hydrogen peroxide vapor (HPV)?
Yes—the AISI 304 stainless steel chamber and gasket materials are compatible with standard HPV bio-decontamination cycles (≤ 1,200 ppm, 30–60 min exposure), provided door seals are inspected post-cycle for integrity.
What is the expected mean time between failures (MTBF) for the compressor system?
Based on accelerated life testing per MIL-HDBK-217F, the hermetic scroll compressor demonstrates >25,000 hours MTBF under continuous operation at –80 °C setpoint and 25 °C ambient.
