Ultra Low Temperature Freezer DW-86W420 – Horizontal -86°C Cryogenic Storage Unit

Overview

The DW-86W420 is a horizontal ultra-low temperature (ULT) freezer engineered for long-term cryopreservation of sensitive biological materials—including primary cells, stem cell lines, genomic DNA, RNA, recombinant proteins, and clinical biospecimens—in compliance with ISO 20387:2018 (Biobanking) and Good Laboratory Practice (GLP) requirements. Operating at a stable setpoint range of −40 °C to −86 °C, the unit achieves its target temperature under nominal ambient conditions of 32 °C (N-class climate rating), maintaining internal uniformity within ±2 °C across the full chamber volume and temporal fluctuation ≤±3 °C (measured per IEC 60068-3-5). Its dual-compressor direct-cooling architecture eliminates reliance on cascade refrigeration, reducing mechanical complexity while enhancing thermal recovery after door openings. The system utilizes an environmentally compliant mixed HFC refrigerant blend—fully aligned with EU F-Gas Regulation (EU) No 517/2014 and China’s HCFC Phase-out Management Plan—ensuring zero ozone depletion potential (ODP = 0) and minimized global warming potential (GWP < 1500).

Key Features

• Dual independent hermetic reciprocating compressors (800 W each) configured in parallel operation for redundancy and load balancing, minimizing single-point failure risk.
• Quadruple-seal door system: two insulated outer doors and two foam-core inner doors, enabling sequential access to individual compartments without compromising temperature integrity in adjacent zones.
• High-efficiency insulation using ≥120 mm thick, CFC-free polyurethane foam with optimized cell structure—validated to achieve U-value <0.18 W/m²·K per EN 13309.
• Active anti-vibration design: isolated refrigerant tubing routing, reinforced compressor mounting, and tuned chassis damping reduce structural transmission of mechanical noise—achieving acoustic emission <49 dB(A) at 1 m distance (per ISO 3744).
• Microprocessor-based controller with real-time LED display, password-protected interface, and configurable alarm thresholds for all critical parameters.
• Comprehensive alarm suite including sensor fault detection, voltage deviation monitoring (±10% tolerance), ambient overtemperature lockout, and delayed startup protection to prevent compressor surge during grid instability.

Sample Compatibility & Compliance

The DW-86W420 supports standardized cryogenic storage workflows per ANSI/ASHRAE Standard 115–2022 and is validated for use with 2-inch cryovials mounted on stainless steel or polypropylene racks (297 vial capacity per full configuration). Internal stainless steel (AISI 304) chamber surfaces resist corrosion from repeated ethanol wipe-downs and condensate exposure. All electrical components meet CE marking requirements under the Low Voltage Directive (2014/35/EU) and Electromagnetic Compatibility Directive (2014/30/EU). The unit carries China NMPA Class II medical device registration (for in vitro diagnostic specimen storage), confirming conformance with YY/T 0466.1–2016 (symbols for medical devices) and GB/T 14710–2009 (environmental testing for medical equipment). Optional data logging modules support 21 CFR Part 11-compliant audit trails when paired with validated software.

Software & Data Management

While the base model features standalone digital control, optional USB-enabled temperature data loggers provide time-stamped, tamper-evident records with ≥30-day onboard memory (1-min sampling interval). Logged data exports as CSV for integration into LIMS or ELN platforms. Remote alarm notification is implemented via dry-contact relay output (NO/NC configurable), compatible with building management systems (BMS) or centralized lab monitoring servers. Firmware updates are performed via secure USB interface; version history and calibration logs are retained locally with write-protection enabled by default. All alarm events—including timestamps, severity level, and recovery status—are stored in non-volatile memory for post-event root cause analysis.

Applications

This ULT freezer serves core functions in academic research laboratories, biobanks, contract research organizations (CROs), and pharmaceutical QC facilities. Typical applications include: long-term archival storage of induced pluripotent stem cells (iPSCs) and embryonic stem cell lines; preservation of patient-derived xenograft (PDX) tissue models; cold-chain holding for mRNA vaccine intermediates prior to lyophilization; stability testing of monoclonal antibodies under accelerated degradation protocols; and secure backup storage for genomic libraries generated via next-generation sequencing (NGS). Its N-class rating ensures reliable performance in uncontrolled environments such as shared core facilities or mobile laboratory trailers.

FAQ

What is the minimum achievable temperature under standard test conditions?
The unit achieves and maintains −86 °C at rated ambient temperature of 25 °C per IEC 62835, with verification at 32 °C ambient confirmed per EN 60068-3-5.
Is remote monitoring supported out-of-the-box?
Standard configuration includes dry-contact alarm relay outputs; Ethernet or Wi-Fi connectivity requires optional gateway hardware and firmware upgrade.
Can the freezer operate continuously during utility voltage fluctuations?
Yes—the controller incorporates wide-input voltage regulation (198–242 V AC) and automatic restart logic with programmable delay (1–10 min) to protect compressors from brownout stress.
Are validation documents (IQ/OQ/PQ) available?
Factory-issued IQ/OQ protocols are provided upon request; PQ execution must be performed on-site by qualified personnel using traceable metrology equipment.
Does the unit comply with FDA requirements for GxP environments?
The base hardware meets mechanical and electrical prerequisites for GMP/GLP; full 21 CFR Part 11 compliance requires deployment of validated third-party data logging and electronic signature solutions.