Hanuo HU-40L Series Ultra-Low Temperature Freezer (–40 °C)

Overview

The Hanuo HU-40L Series Ultra-Low Temperature Freezer is an upright, energy-efficient cryogenic storage system engineered for stable long-term preservation of temperature-sensitive biological materials at –40 °C. Unlike deep-freeze units operating below –60 °C, this model targets applications where consistent sub-zero stability—without extreme cryogenic demands—is required: plasma fractionation, diagnostic reagent storage, vaccine intermediate handling, and non-cryopreserved cell line maintenance. Its refrigeration architecture employs a cascade two-stage compressor system with environmentally compliant R404A/R23 mixed-refrigerant circulation, enabling rapid pull-down to setpoint (≤3.5 hours from 25 °C ambient to –40 °C) and thermal uniformity of ±2.5 °C across the entire 50 L chamber volume. The unit integrates a microprocessor-based PID temperature controller with dual-sensor redundancy (one for control, one for independent alarm monitoring), ensuring operational integrity under variable load and ambient conditions typical in hospital basements, blood bank utility rooms, or shared core facilities.

Key Features

• Upright configuration with ergonomic single-door design and magnetic door seal optimized for frequent access without thermal leakage
• Stainless steel interior liner (SUS304) with rounded corners and seamless welds for easy decontamination and compliance with ISO 13485 cleanroom-compatible surface requirements
• Dual independent temperature sensors with configurable high/low alarms and visual-audible alert escalation (LED indicator + buzzer)
• Real-time power failure detection with battery-backed memory retaining setpoint, alarm history, and last 72 hours of temperature log
• Adjustable shelving system (three removable polypropylene-coated wire shelves) supporting standard 2 mL cryovial racks, 50 mL conical tubes, and plate stacks
• Low-noise operation (<52 dB(A) at 1 m) suitable for installation in proximity to analytical laboratories or clinical workflow zones

Sample Compatibility & Compliance

The HU-40L accommodates primary and secondary packaging formats common in transfusion medicine and biobanking: blood bags (up to 500 mL), plasma aliquots in cryo-tubes, lyophilized reagents, RNA extraction kits, and enzyme stock solutions. It is routinely deployed in environments subject to regulatory oversight—including blood bank accreditation per AABB Standard 5.12 (temperature monitoring), CLIA-waived testing support, and WHO Good Distribution Practice (GDP) Annex 9 for cold chain integrity. While not certified for ISO 13408-1 (sterile processing) or USP (cold chain validation), its documented thermal mapping performance (per ASTM F2661-21 Annex A1) supports internal qualification protocols. Data logging output conforms to FDA 21 CFR Part 11 requirements when paired with Hanuo’s optional USB-archivable Logger Module (sold separately).

Software & Data Management

Local data capture is managed via a built-in LCD interface with timestamped event logging (door openings, temperature excursions >±3 °C, compressor runtime). Optional RS485 Modbus RTU connectivity enables integration into centralized BMS platforms (e.g., Siemens Desigo, Honeywell Enterprise Buildings Integrator) for remote status polling and alarm forwarding. The Hanuo DataBridge™ PC software (Windows 10/11 compatible) provides exportable CSV reports, trend visualization over 30-day windows, and configurable email/SMS alerts via SMTP gateway—supporting audit-ready documentation for GLP/GMP-aligned quality systems. All stored records include digital signatures, user login traceability, and immutable timestamps aligned to NTP servers.

Applications

• Blood bank plasma and platelet storage prior to fractionation
• Hospital central lab storage of calibrated immunoassay controls and calibrators
• Biotech QC labs maintaining reference standards for ELISA and lateral flow assays
• Academic research groups preserving primary tissue homogenates and protein lysates
• Marine bioprospecting programs storing deep-sea microbial isolates at metabolically suppressed states
• Electronic component manufacturers storing humidity-sensitive solder pastes and conductive adhesives

FAQ

What is the minimum ambient temperature for reliable operation?
The unit is rated for continuous operation in ambient environments between +10 °C and +32 °C, with derating above 28 °C requiring additional ventilation clearance (≥150 mm on all sides).

Can this freezer be validated for IQ/OQ/PQ according to GAMP 5 guidelines?
Yes—Hanuo provides a Validation Support Package including DQ templates, FAT/SAT checklists, and protocol-ready calibration certificates for PT100 sensors traceable to NIM (China National Institute of Metrology).

Is remote monitoring possible without third-party hardware?
Basic remote status (on/off, current temp, alarm state) is accessible via optional Wi-Fi dongle (HU-WiFi-01); full telemetry requires DataBridge™ software and local network access.

Does the unit meet European CE marking requirements for medical device ancillary equipment?
It carries CE marking under the Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU), but is classified as laboratory equipment—not an active medical device per MDR 2017/745.