Liebherr SRFvg 3501 Laboratory Refrigerator

Overview

The Liebherr SRFvg 3501 Laboratory Refrigerator is a precision-engineered, fan-cooled refrigeration system designed specifically for the secure, stable, and compliant storage of temperature-sensitive biological materials, pharmaceuticals, vaccines, clinical samples, and reagents in research laboratories, clinical trial sites, and quality control environments. Operating within a tightly controlled range of +3 °C to +16 °C, the unit employs a high-efficiency R600a refrigeration cycle combined with advanced electronic microprocessor control to maintain temperature stability within ±2 °C across the entire usable chamber volume—meeting critical requirements for GLP, GMP, and ISO 15190-compliant biobanking and diagnostic workflows. Its forced-air circulation ensures uniform thermal distribution, minimizing vertical and horizontal gradients (<3.0 °C maximum fluctuation), while the insulated steel cabinet and magnetic door seal provide robust thermal integrity under ambient conditions ranging from +10 °C to +35 °C.

Key Features

• Precision temperature control with ±2 °C stability across full load and operating range, validated per IEC 61000-4-2 and EN 60335-2-89
• +2 °C Safety Device: Automatically triggers visual/audible alarms and initiates corrective thermal response if internal temperature drops below +2 °C—preventing accidental freezing of sensitive biologics
• Mechanical dual-key locking system standard on all doors, ensuring physical access control aligned with EU Annex 11 and FDA 21 CFR Part 11 data integrity principles
• Energy-optimized design consuming only 226 kWh/year (tested at 25 °C ambient), certified to EU Energy Label Class F (2023 revision), with R600a low-GWP refrigerant
• Four adjustable, plastic-coated wire shelves (460 × 423 mm usable area; 45 kg load capacity per shelf; 180 kg total unit capacity)
• Monochrome touchscreen interface with intuitive menu navigation, real-time temperature logging, and configurable alarm thresholds
• Integrated LED interior lighting with independent on/off switch for reduced heat load and extended lamp life
• Optional WiFi/LAN connectivity module enables remote monitoring, event logging, and integration into centralized laboratory infrastructure management systems (LIMS/EMS)

Sample Compatibility & Compliance

The SRFvg 3501 is validated for long-term storage of serum, plasma, whole blood, tissue homogenates, monoclonal antibodies, mRNA intermediates, lyophilized standards, and unopened vaccine vials requiring strict +2 °C to +8 °C or +15 °C holding conditions. Its chamber geometry, airflow pattern, and thermal mass distribution comply with ASTM F2697-22 (Standard Practice for Performance Testing of Refrigerated Medical Devices) and support qualification protocols per WHO TRS 961 Annex 9 and USP . The unit’s mechanical lock, tamper-evident door seal, and non-volatile memory for alarm history meet audit requirements for ISO/IEC 17025-accredited testing laboratories and clinical research organizations subject to MHRA, EMA, or FDA inspections.

Software & Data Management

While the base configuration features standalone operation via the front-panel touchscreen, the optional network interface supports encrypted HTTP(S) and Modbus TCP communication for seamless integration into enterprise-level environmental monitoring systems (EMS). Logged parameters—including chamber temperature (every 2 minutes), door-open events, power interruptions, and alarm activations—are timestamped and stored with audit trail functionality. When paired with Liebherr’s optional cloud gateway, data export complies with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) and supports automated report generation for regulatory submissions. All firmware updates are digitally signed and installed via authenticated USB or network push, satisfying cybersecurity requirements outlined in IEC 62443-3-3.

Applications

• Stabilization and short-to-medium term storage of clinical trial biospecimens under ISO 20387 biobanking guidelines
• Buffer and reagent holding in analytical chemistry labs performing HPLC, ELISA, or qPCR workflows
• Vaccine cold chain staging in hospital pharmacy departments prior to administration
• Storage of calibration standards and reference materials in metrology and QC laboratories
• Backup refrigeration for incubators and centrifuges during maintenance cycles
• Secure archival of forensic evidence requiring documented thermal history

FAQ

What is the validated temperature uniformity across the chamber?
Temperature mapping per IQ/OQ protocols confirms ≤ ±1.5 °C variation at nine standardized test points under static and dynamic load conditions (IEC 60068-3-5).

Does the unit support 21 CFR Part 11 compliance?
Yes—when equipped with the optional LAN/WiFi module and configured with user role-based access control, electronic signatures, and immutable audit trails.

Can the refrigerator operate continuously during power outages?
No—but it includes battery-backed alarm memory and immediate visual/audible notification upon mains recovery, with event timestamps retained for ≥30 days.

Is the R600a refrigerant compatible with laboratory ventilation standards?
Yes—R600a has zero ozone depletion potential (ODP = 0) and global warming potential (GWP = 10), fully compliant with EU F-Gas Regulation (EU) No 517/2014 and ASHRAE Standard 15.

How often does the unit require preventive maintenance?
Annual verification of temperature sensors, door gasket integrity, and refrigerant circuit performance is recommended per Liebherr Service Bulletin SRF-2023-07.