Haier Biomedical DW-86L490 Ultra-Low Temperature Freezer

Overview

The Haier Biomedical DW-86L490 Ultra-Low Temperature Freezer is an upright, dual-compressor laboratory freezer engineered for long-term cryopreservation of sensitive biological specimens—including primary cells, stem cell lines, genomic DNA, RNA, proteins, and clinical biosamples—under stringent cold chain requirements. Operating on a direct-cooling architecture with an eco-friendly mixed HFC refrigerant blend, the unit achieves and maintains stable storage temperatures from –40 °C to –86 °C, even under ambient conditions up to 32 °C (Climate Class N). Its temperature uniformity of ±6 °C across the full 490 L internal volume ensures reproducible thermal stability critical for sample integrity in GLP- and GMP-aligned environments. The system’s structural design emphasizes mechanical robustness and operational continuity: reinforced cabinet framing, vibration-dampened refrigeration circuitry, and modular electrical control architecture collectively minimize thermal drift and system downtime.

Key Features

• Dual independent compressor system (2 × 927 W hermetic reciprocating units) enables load balancing, extended service life, and redundancy during maintenance or partial failure.
• Quadruple sealing architecture: two outer magnetic gasket doors + four inner foam-insulated doors—each with individual locking mechanisms—segment the chamber into two thermally isolated zones for differential access control and minimized cold loss.
• Vacuum Insulation Panel (VIP) core combined with CFC-free polyurethane foam delivers industry-leading thermal resistance, reducing energy consumption by up to 25% versus conventional ultra-low freezers of comparable capacity.
• Comprehensive alarm suite with relay-based remote notification (NO/NC contacts), audible/visual alerts, and event-logged fault diagnostics—including ambient over-temperature, filter clogging, voltage deviation, sensor failure, and low backup battery status.
• Microprocessor-based digital controller with password-protected LED interface supports real-time monitoring, setpoint adjustment (0.1 °C resolution), and configurable alarm thresholds per user-defined protocols.
• Structural ergonomics: integrated casters with locking leveling feet, single-point detection port (Φ10 mm), and 50 kg-rated adjustable shelves compatible with standard 2-inch cryovial racks (optional).

Sample Compatibility & Compliance

The DW-86L490 accommodates standard cryogenic storage configurations, supporting up to 288 × 2-inch cryovials per full-load arrangement. Its interior chamber—lined with electrogalvanized steel coated for corrosion resistance—is compatible with ethanol-, isopropanol-, and LN₂-compatible labeling materials and autoclavable accessories. The unit complies with IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and bears CE marking per EU Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). It holds a valid Class IIb Medical Device Registration Certificate issued by China’s National Medical Products Administration (NMPA), confirming conformity to YY/T 0017–2019 (Technical Requirements for Ultra-Low Temperature Freezers). While not pre-certified to FDA 21 CFR Part 11, its optional USB-enabled data logger (with time-stamped temperature logs and audit trail export) supports validation documentation for ISO 13485 and CAP-accredited biobanks.

Software & Data Management

The embedded controller does not include proprietary cloud software but provides standardized analog/digital outputs (0–5 V, 4–20 mA) and dry-contact alarm relays for integration into third-party building management systems (BMS) or centralized lab monitoring platforms (e.g., LabVantage, Thermo Fisher SampleManager). Optional USB data loggers record temperature at user-defined intervals (1–60 min), storing ≥30 days of data with timestamp, min/max values, and alarm events. All logged files export in CSV format for traceable analysis compliant with ALCOA+ principles. Password protection (four-digit PIN) restricts parameter modification and display access, satisfying basic data integrity controls required under GLP Annex 11 and ISO/IEC 17025.

Applications

This freezer serves as a primary storage solution in academic research laboratories, contract research organizations (CROs), biobanks, and pharmaceutical QC labs where preservation stability directly impacts assay validity. Typical use cases include: long-term archiving of induced pluripotent stem cells (iPSCs); storage of monoclonal antibody drug substance intermediates; maintenance of reference standards for ELISA and PCR workflows; and cold-chain staging prior to shipment under WHO GDP guidelines. Its dual-zone door configuration supports workflow segregation—e.g., high-frequency access to recently processed samples in the upper compartment, while legacy archives remain undisturbed in the lower zone—reducing cumulative thermal cycling and preserving sample viability over decades.

FAQ

What is the minimum ambient temperature at which the DW-86L490 can maintain –86 °C?

The unit is rated for continuous operation at ambient temperatures up to 32 °C (Climate Class N), with verified performance down to –86 °C under those conditions.

Is the freezer compatible with liquid nitrogen (LN₂) or CO₂ backup systems?

Yes—both LN₂ and CO₂ backup interfaces are available as factory-installed options, enabling seamless transition during prolonged power outages or compressor failure.

Does the unit support 21 CFR Part 11 compliance?

Out-of-the-box, it does not include electronic signature or audit trail functionality. However, when paired with the optional USB data logger and validated SOPs, it can be incorporated into a Part 11–compliant environment with appropriate procedural controls.

Can the inner doors be operated independently without affecting the opposite compartment?

Yes—each of the four inner doors functions autonomously; opening one does not compromise the thermal integrity of the other three compartments.

What certifications are included with delivery?

CE Declaration of Conformity, NMPA Medical Device Registration Certificate, and Factory Calibration Report (including temperature mapping at three load conditions) are supplied with each unit.