Liebherr SRFvg 5511 Laboratory Refrigerator

Overview

The Liebherr SRFvg 5511 is a precision-engineered laboratory refrigerator designed for the secure, stable, and compliant cold storage of temperature-sensitive biological materials, pharmaceuticals, vaccines, clinical specimens, and reference standards. Built to meet the stringent environmental control requirements of GLP, GMP, and ISO 15190-accredited laboratories, this unit employs forced-air convection cooling with microprocessor-controlled regulation to maintain setpoint accuracy within ±2 °C across the full operating range of +3 °C to +16 °C. Its thermally optimized cabinet architecture—featuring high-density polyurethane insulation, double-glazed low-emissivity glass doors, and hermetically sealed refrigeration circuitry—ensures minimal thermal bridging and exceptional uniformity. The unit complies with IEC 61000-6-3 (EMC) and IEC 61000-6-2 (immunity) standards, and its R600a refrigerant meets EU F-Gas Regulation (EU) No 517/2014 requirements for low-global-warming-potential (GWP < 10) operation.

Key Features

• Precision temperature control via PID-regulated digital thermostat with real-time monitoring and setpoint resolution of 0.1 °C
• +2 °C Safety Device: Automatically triggers audible/visual alarm and initiates corrective action if internal temperature drops below +2 °C—preventing accidental freezing of vaccines or biologics
• Forced-air circulation system with multi-point air distribution ensures ≤3.2 °C maximum temperature fluctuation and ≤3.8 °C vertical gradient (measured per DIN EN 13486)
• Five adjustable, plastic-coated wire shelves (600 × 536 mm), each rated for 60 kg; total shelf area supports organized, traceable sample staging
• Mechanical dual-key lock system compliant with ISO 22320:2021 security protocols for restricted-access storage environments
• Energy-optimized design achieving 433 kWh/year consumption (tested at +25 °C ambient per EN 62552-3), reducing operational cost and carbon footprint
• Integrated LED lighting with independent on/off switch, minimizing heat load and enabling safe nighttime access without compromising thermal stability
• Comprehensive alarm suite including power failure detection (with memory retention during outage), door-open warning, sensor fault indication, and temperature deviation alerts

Sample Compatibility & Compliance

The SRFvg 5511 is validated for long-term storage of WHO-prequalified vaccines (e.g., mRNA, viral vector, and protein subunit formulations), blood-derived products, cell cultures, nucleic acid extracts, and calibrated reference materials. Its interior chamber—free of condensation-prone surfaces and constructed with non-corrosive, easy-clean steel—supports routine decontamination using ethanol, hydrogen peroxide vapor (HPV), or quaternary ammonium compounds without material degradation. The unit satisfies critical regulatory expectations for cold chain integrity: it enables continuous temperature logging (via optional Wi-Fi/LAN interface), supports audit-ready data export in CSV format, and provides configurable alarm thresholds aligned with USP , EU Annex 15, and FDA 21 CFR Part 11 requirements for electronic records and signatures when paired with Liebherr’s certified data management software.

Software & Data Management

While the base configuration features a monochrome touchscreen interface with intuitive menu navigation and event log history (last 100 entries), the SRFvg 5511 supports seamless integration into centralized laboratory infrastructure via optional Ethernet or Wi-Fi connectivity modules. When enabled, the unit transmits real-time temperature readings, alarm status, and system diagnostics to Liebherr’s cloud-based LabClimate Monitor platform—compatible with third-party LIMS and BMS systems via Modbus TCP or HTTP REST API. All data transmissions are encrypted (TLS 1.2+), and local storage retains ≥30 days of 1-minute interval temperature data even during network interruption. Audit trail functionality records user actions—including setpoint changes, alarm acknowledgments, and door openings—with timestamps, operator IDs, and IP addresses, satisfying ALCOA+ principles for data integrity.

Applications

• Pharmaceutical quality control labs storing stability-indicating reference standards and retained batches under ICH Q5C conditions
• Hospital pharmacy cold rooms maintaining vaccine inventory at WHO-recommended +2 °C to +8 °C sub-range (configurable within +3 °C to +16 °C span)
• Academic research facilities preserving primary cell isolates, organoid cultures, and CRISPR reagent kits requiring consistent non-freezing refrigeration
• Clinical trial sites archiving biospecimens (serum, plasma, CSF) under ISO 20387:2018 biobanking requirements
• Contract development and manufacturing organizations (CDMOs) deploying validated cold storage for drug substance intermediates prior to lyophilization

FAQ

What is the temperature uniformity performance across the chamber volume?
Measured per DIN EN 13486, the SRFvg 5511 achieves ≤±1.2 °C spatial uniformity (9-point probe test) at +5 °C setpoint, with worst-case vertical gradient of 3.8 °C and temporal fluctuation of ≤3.2 °C over 24 hours.
Does the unit support 21 CFR Part 11-compliant electronic records?
Yes—when equipped with the optional LAN/Wi-Fi module and configured with Liebherr’s LabClimate Monitor v3.2+, the system provides role-based access control, electronic signatures, and immutable audit trails meeting FDA 21 CFR Part 11 Subpart B requirements.
Can the refrigerator operate reliably in tropical ambient conditions?
The unit is rated for continuous operation within +10 °C to +35 °C ambient, with full performance assurance up to 32 °C at 60% RH—validated per IEC 60068-2-14 for thermal shock resilience.
Is the +2 °C Safety Device an independent hardware circuit or software-based?
It is a redundant, hardwired safety circuit with dedicated temperature sensor and relay output—functioning independently of the main controller to ensure fail-safe protection against freezing events.
What maintenance intervals are recommended for optimal calibration longevity?
Annual verification of temperature sensors and alarm functionality is advised; Liebherr-certified technicians perform NIST-traceable calibration using accredited dry-block calibrators (±0.15 °C uncertainty) and generate ISO/IEC 17025-compliant certificates.