Liebherr SFFvh 5501 Laboratory Cryogenic Refrigerator

Overview

The Liebherr SFFvh 5501 is a purpose-engineered laboratory cryogenic refrigerator designed for the secure, stable, and compliant long-term storage of temperature-sensitive biological materials, pharmaceuticals, vaccines, reference standards, and clinical samples. Operating within a precisely controlled range of –9 °C to –35 °C, the unit employs forced-air (fan-assisted) circulation combined with an intelligent NoFrost automatic defrost system to maintain uniform thermal conditions across its entire storage volume—critical for preserving sample integrity in regulated environments. Its architecture adheres to the stringent performance, safety, and verification requirements defined in DIN 13277 for biomedical and laboratory cold storage equipment, and complies fully with IEC 61010-2-011 for electrical safety in laboratory use. The unit integrates a high-efficiency R290 refrigeration circuit, low-noise operation (55 dB[A]), and a robust steel cabinet with white epoxy-coated finish, ensuring mechanical durability and compatibility with cleanroom and GxP-aligned laboratory infrastructures.

Key Features

• 2.4-inch full-color touchscreen interface with intuitive swipe navigation for precise temperature setpoint control (±0.1 °C resolution), alarm configuration, and real-time status monitoring
• NoFrost technology eliminates manual defrost cycles by continuously managing internal humidity via timed fan-assisted evaporation and periodic micro-defrost phases—ensuring uninterrupted sample stability and minimizing operator intervention
• Integrated dual-mode alarm system: visual and audible alerts triggered instantly upon power failure (with 12-hour battery-backed retention) or deviation beyond user-defined temperature thresholds
• Mechanical lock with two physical keys provides tamper-resistant access control—essential for inventory accountability in GLP, GMP, or ISO 17025 environments
• LED interior lighting with front-mounted illumination ensures full visibility across all six adjustable drawers and two wire baskets—even under low-ambient light conditions—reducing door-open time and thermal load perturbation
• Four plastic-coated wire shelves (600 × 510 mm usable area), each rated for 60 kg load; total unit load capacity: 300 kg
• Front-positioned castors with brakes + rear fixed feet enable safe, stable repositioning without compromising vibration isolation or thermal seal integrity

Sample Compatibility & Compliance

The SFFvh 5501 supports diverse sample formats—including vials, cryotubes, multiwell plates, serum bottles, and vaccine carriers—within its optimized internal geometry (603 × 510 × 1118 mm). Its validated temperature uniformity (gradient ≤5.5 °C, max. fluctuation ≤4.4 °C) meets the spatial stability benchmarks required for storage of WHO-prequalified vaccines and USP –compliant pharmaceuticals. Conformance to DIN 13277 confirms compliance with mandatory testing protocols for thermal recovery time, door-opening impact, insulation integrity, and alarm response latency. Electrical safety certification per IEC 61010-2-011 covers protection against electric shock, mechanical hazards, and abnormal heat generation—fully aligned with CE marking requirements. Optional data logging (via integrated USB port) supports audit-ready traceability for 21 CFR Part 11–compatible systems when paired with validated third-party software.

Software & Data Management

The SFFvh 5501 includes an embedded data logger capable of recording temperature, alarm events, and power status at user-configurable intervals (1–60 min). Logged data is exportable via USB to standard CSV format for integration into LIMS, ELN, or QMS platforms. While native WiFi/LAN connectivity is hardware-integrated and field-upgradable, current firmware supports only local data retrieval; remote monitoring requires external gateway integration compliant with IEEE 802.11 b/g/n and TLS 1.2 encryption. All configuration changes, alarm acknowledgments, and door-open events are timestamped and stored with immutable audit trail metadata—supporting GLP documentation requirements and facilitating root-cause analysis during internal or regulatory audits.

Applications

• Stable storage of mRNA vaccines, monoclonal antibodies, and lyophilized biologics requiring consistent sub-zero conditions without phase transition risk
• Long-term archiving of clinical trial biospecimens (serum, plasma, PBMCs) under ISO 20387-accredited biobanking workflows
• QC/QA holding of reference standards and calibration materials in pharmaceutical manufacturing facilities operating under EU Annex 1 and FDA cGMP guidelines
• Backup cold storage for ultra-low temperature (–80 °C) freezers during maintenance or emergency temperature excursions
• Secure transport staging for temperature-controlled logistics in hospital pharmacy and central lab distribution networks

FAQ

What is the minimum and maximum operational ambient temperature for the SFFvh 5501?
The unit is rated for continuous operation in ambient environments between +10 °C and +35 °C, as specified in DIN 13277 Clause 5.2.
Does the SFFvh 5501 support 21 CFR Part 11-compliant electronic signatures?
The device itself does not provide electronic signature functionality; however, its timestamped, exportable log files serve as raw data inputs for validated third-party software that implements Part 11 controls.
Is R290 refrigerant compatible with laboratory HVAC ventilation standards?
Yes—R290 (propane) is classified as A3 (low toxicity, high flammability) under ASHRAE 34; installation must comply with local mechanical code provisions for charge containment and room ventilation, particularly in confined spaces.
Can the internal LED lighting be disabled or dimmed?
No—the LED illumination is automatically activated upon door opening and cannot be manually deactivated; this design ensures consistent visual access while minimizing energy use through occupancy-based activation.
What validation documentation is supplied with the unit?
Each SFFvh 5501 ships with a Factory Acceptance Test (FAT) report, DIN 13277 compliance certificate, CE Declaration of Conformity, and IEC 61010-2-011 test summary—all traceable to serial number and issued by Liebherr’s Austrian quality assurance department.