Thermo Scientific Revco DxF and CxF Series Ultra-Low Temperature Freezers

Overview

The Thermo Scientific Revco DxF and CxF Series Ultra-Low Temperature Freezers are engineered for consistent, energy-efficient storage of temperature-sensitive biological materials—including cell lines, primary tissues, enzymes, and nucleic acid samples—within the –10 °C to –40 °C operational range. Unlike deep-cold –80 °C freezers, these units occupy a critical niche in laboratory cold chain infrastructure where moderate ultra-low temperatures balance sample integrity, energy consumption, and mechanical reliability. The DxF and CxF platforms utilize a cascade refrigeration system with dual-stage compressors and environmentally optimized R-404A/R-508B mixed-refrigerant blends, delivering stable thermal uniformity (±2.5 °C at setpoint) across the entire chamber volume. Constructed with industrial-grade components—including heavy-gauge cold-rolled steel exteriors and electropolished 304 stainless steel interiors—the units meet stringent durability requirements for high-traffic core facilities and GLP-compliant biobanks.

Key Features

• 5-inch (127 mm) in-situ poured polyurethane insulation with 114 mm door thickness, achieving U-values ≤0.18 W/m²·K for minimized heat ingress and reduced compressor cycling.
• Triple-layer magnetic door gasket system with integrated vacuum relief valve, enabling rapid resealing after frequent access while preventing vacuum lock during consecutive openings.
• Microprocessor-based controller with real-time temperature monitoring, adjustable alarm thresholds (high/low), and configurable audible/visual alerts via front-panel LED indicators.
• Robust 304 stainless steel shelving rated for ≥45 kg per shelf (uniformly distributed load), supporting standard cryoboxes, racks, and stacked specimen containers without deformation.
• Integrated power management module featuring surge suppression, automatic voltage regulation (198–253 V input tolerance), and brownout recovery to maintain thermal stability during grid fluctuations.
• Standard communication interfaces: RS-485 (Modbus RTU protocol), analog 4–20 mA output for external data loggers, and dry-contact remote alarm terminals compatible with building management systems (BMS).
• Optional CO₂ or liquid nitrogen (LN₂) backup cooling modules—certified for up to 72-hour holdover time under full-load conditions during primary system failure or power outage.
• Factory-installed chart recorder option (electromechanical or digital) compliant with 21 CFR Part 11 audit trail requirements when paired with validated software configuration.

Sample Compatibility & Compliance

The DxF and CxF series support long-term storage of diverse biospecimens, including but not limited to: frozen plasma, PBMCs, tissue homogenates, recombinant proteins, and lyophilized reagents. Chamber geometry and airflow design ensure minimal thermal stratification—validated per ISO 14644-1 Class 8 cleanroom-compatible air filtration (optional HEPA upgrade available). Units comply with IEC 61010-1 (Safety Requirements for Electrical Equipment), EN 60335-2-24 (Household and Similar Electrical Appliances – Particular Requirements for Refrigerating Appliances), and carry CE marking for EU market placement. Optional validation packages include IQ/OQ documentation templates aligned with ISO/IEC 17025 and GxP laboratory quality systems.

Software & Data Management

When equipped with the optional Thermo Fisher Connect™ Remote Monitoring Gateway, the freezer integrates into centralized lab infrastructure via secure TLS 1.2 encrypted MQTT communication. Logged parameters—including cabinet temperature, condenser discharge temperature, compressor run time, and door-open duration—are timestamped and stored locally for ≥30 days (configurable). Audit trails capture user login events, setpoint modifications, and alarm acknowledgments—fully traceable for FDA 21 CFR Part 11 compliance when deployed with electronic signature workflows. Raw data exports support CSV and XML formats, enabling direct ingestion into LIMS platforms such as LabVantage or STARLIMS.

Applications

• Biorepository operations requiring stable –20 °C to –40 °C storage for clinical trial biosamples prior to downstream processing.
• Pharmaceutical QC laboratories maintaining reference standards and stability test samples under ICH Q5C guidelines.
• Academic core facilities managing shared cryo-resources for stem cell lines and primary neuronal cultures.
• Hospital blood banks storing thawed plasma and platelet concentrates within validated thermal envelopes.
• Vaccine distribution hubs utilizing the optional LN₂ backup system for emergency holdover during transport staging.

FAQ

What is the minimum ambient temperature rating for continuous operation?
The DxF/CxF series is rated for ambient operating conditions between 10 °C and 32 °C (with ≤80% relative humidity, non-condensing), per IEC 60068-2-1/2 environmental testing protocols.
Can the unit be installed in a non-ventilated room?
No—adequate rear and side clearance (≥100 mm) and unobstructed airflow above the condenser are mandatory; installation in enclosed cabinets or tight alcoves voids warranty and compromises thermal performance.
Is remote firmware update capability supported?
Yes—via Thermo Fisher Connect™ platform with signed binary verification and rollback functionality to ensure system integrity during updates.
Does the standard configuration include temperature mapping validation?
No—temperature mapping (per ISO 14647-1) is performed as a site-specific qualification service and requires separate scheduling with Thermo Fisher Field Service Engineers.
Are replacement parts such as gaskets and controllers available globally?
Yes—all critical spares—including triple-seal gaskets, microcontroller boards, and compressor assemblies—are stocked in regional distribution centers across EMEA, APAC, and the Americas, with typical lead times under 5 business days.