Liebherr LKexv 3600 Explosion-Proof Laboratory Refrigerator

Overview

The Liebherr LKexv 3600 Explosion-Proof Laboratory Refrigerator is an ATEX-certified upright refrigeration unit engineered for the secure, temperature-stable storage of flammable liquids, volatile solvents, combustible powders, and other hazardous substances in regulated laboratory environments. Designed and manufactured in Austria under strict adherence to EU Directive 2014/34/EU (ATEX 95), this unit operates within a precisely controlled temperature range of +1 °C to +15 °C—optimized for common chemical storage requirements across academic research labs, pharmaceutical QC facilities, biotechnology development centers, and industrial R&D settings. Its core architecture integrates intrinsic safety principles: all electrical components—including compressors, controllers, fans, and lighting—are encapsulated or constructed to eliminate ignition sources under normal and fault conditions. The system employs a spark-free automatic defrost cycle and utilizes R600a refrigerant—a hydrocarbon with negligible global warming potential (GWP = 10) and zero ozone depletion potential (ODP = 0)—ensuring compliance with F-Gas Regulation (EU) No. 517/2014.

Key Features

• ATEX-certified explosion protection per EN 60079-1 (flameproof enclosure “d”) and EN 60079-15 (non-sparking “nA” components), validated by notified body testing
• High-precision electronic temperature control with ±0.1 °C stability and uniformity across all shelves (tested per EN 62552)
• Intelligent alarm system monitoring four critical parameters: temperature excursion, door-open duration (>30 s), mains power loss, and internal sensor fault
• Non-volatile memory storing the last three alarm events—including timestamp, parameter, and duration—for audit-ready traceability
• Optional external PT100 probe input enabling independent verification of chamber temperature for GLP/GMP validation protocols
• Reversible door hinge configuration supporting right- or left-handed installation in constrained lab layouts
• Energy-efficient operation: 0.947 kWh/24 h (measured at 25 °C ambient, SN-ST climate class), meeting EU Energy Label Class A++ standards
• Ultra-quiet operation at ≤42 dB(A) at 1 m distance—critical for low-noise laboratory zones and shared instrumentation rooms
• Robust mechanical locking mechanism with dual-point latch and tamper-resistant key system for chain-of-custody integrity

Sample Compatibility & Compliance

The LKexv 3600 accommodates standard laboratory containers—including glass bottles (up to 2 L), HDPE solvent carboys, aluminum aerosol cans, and sealed powder jars—within its 333 L usable volume. Interior shelving consists of tempered glass supports (rated 40 kg per shelf) and reinforced polypropylene drawers (24 kg capacity), both chemically resistant to common organic solvents and acids. The unit complies with international safety and performance standards applicable to hazardous area equipment: EN 60079-0 (general requirements), EN 60079-1 (flameproof enclosures), EN 60079-15 (non-sparking construction), and IEC 60079-26 (equipment for explosive atmospheres requiring functional safety). It is suitable for Zone 1 and Zone 2 classified areas per IEC 60079-10-1. For regulatory documentation, full ATEX certificate, EC-type examination report, and declaration of conformity are supplied with each unit.

Software & Data Management

This model features embedded firmware—not cloud-connected software—with local data handling optimized for integrity and security. All temperature setpoints, alarm thresholds, and logging parameters are configured via a front-panel membrane keypad with LED feedback. The controller maintains real-time temperature history at 10-minute intervals (retained for 30 days) and stores the most recent three alarm entries with full metadata: event type, start/end time, duration, and recovery status. While no proprietary PC software is required, optional RS485 Modbus RTU interface enables integration into centralized building management systems (BMS) or LIMS platforms for automated temperature reporting. Audit trails comply with FDA 21 CFR Part 11 requirements when paired with appropriate electronic signature workflows and system access controls implemented at the facility level.

Applications

• Storage of flammable reagents (e.g., acetone, ethanol, ether, hexane) in university chemistry teaching and research laboratories
• Secure holding of calibration standards and reference materials in ISO/IEC 17025-accredited testing labs
• Controlled-temperature staging of volatile organic compounds (VOCs) prior to GC-MS analysis
• Stabilization of heat-sensitive catalysts and initiators used in polymer synthesis and fine chemical manufacturing
• Compliance-driven storage of GHS-classified Category 1 and 2 flammable liquids under OSHA 1910.106 and NFPA 30 guidelines
• Backup cold storage for biological samples co-housed with flammable solvents in hybrid biochemistry labs

FAQ

Is the LKexv 3600 certified for use in Zone 1 hazardous areas?
Yes—it holds ATEX certification for Group II, Category 2G (gas) equipment, rated for continuous operation in Zone 1 per EN 60079-1 and EN 60079-15.
Can the unit be validated for IQ/OQ/PQ in GxP environments?
Absolutely. Its stable thermal profile, calibrated sensor inputs, alarm logging, and mechanical lock support full qualification per ASTM E2500 and ISPE Good Automated Manufacturing Practice (GAMP®) guidelines.
Does it support external temperature monitoring per USP ?
Yes—the optional PT100 input allows connection of a calibrated, independent sensor for redundant monitoring aligned with USP general chapter on temperature mapping and monitoring.
What is the warranty coverage and service support structure?
Liebherr provides a 24-month limited warranty covering parts and labor, backed by authorized European service partners with certified ATEX technicians and genuine spare parts inventory.
How does the automatic defrost system ensure explosion safety?
Defrost cycles utilize only passive heat transfer (no resistive heaters) and employ hermetically sealed, non-sparking fan motors—fully compliant with EN 60079-15 “nA” protection methods.