Tianfeng TF-60-458X-WA Ultra-Low Temperature Freezer

Overview

The Tianfeng TF-60-458X-WA Ultra-Low Temperature Freezer is an engineered solution for long-term cryogenic storage of temperature-sensitive biological and chemical specimens. Designed and manufactured in Shanghai under ISO 9001:2000–certified quality management systems, this freezer employs a cascade refrigeration architecture—comprising primary and secondary compressors with an eco-friendly refrigerant blend (R23/R508B or equivalent)—to achieve stable operation across the full −25 °C to −65 °C range. Its dual-mode heat dissipation system integrates passive natural convection with active forced-air cooling, enhancing thermal resilience in ambient environments up to 35 °C and mitigating performance degradation under dust-prone or high-temperature laboratory conditions. The unit features 120 mm-thick polyurethane insulation with vacuum-enhanced density distribution, minimizing thermal bridging and reducing annual energy consumption relative to comparable imported models. Structural integrity is reinforced by a monolithic stainless-steel interior (AISI 304), seamless coved corners, and a rigid external chassis engineered for mechanical stability during transport and installation.

Key Features

• Stable temperature control with ±1.5 °C uniformity across the entire 458 L chamber volume, verified per IEC 60068-3-5 test protocols
• Four independently sealed inner doors with multi-point magnetic gaskets, limiting cold air loss during frequent access cycles
• Three height-adjustable stainless-steel shelves supporting load capacities up to 25 kg per shelf, compatible with standard cryoboxes and rack systems
• Dual-mode condenser design: 50% natural convection + 50% fan-assisted cooling, enabling continued operation even with partial airflow obstruction
• RS-232 serial interface (optional) for integration into centralized lab monitoring platforms, supporting ASCII-based data logging at user-defined intervals
• Integrated audible/visual alarm system with configurable thresholds for temperature deviation, door ajar, power failure, and compressor fault conditions
• Electromechanical door lock and main power switch lock for controlled access compliance in GLP/GMP-regulated environments
• Front-accessible dust filter with tool-free removal and washable mesh construction, facilitating routine maintenance without disassembly

Sample Compatibility & Compliance

The TF-60-458X-WA is validated for storage of primary human biospecimens—including peripheral blood mononuclear cells (PBMCs), cord blood units, plasma fractions, and tissue explants—as well as microbial cultures, vaccine intermediates, and thermolabile reagents. Its internal geometry (1380 × 500 × 660 mm) accommodates standard 2-inch cryovial racks (e.g., Nunc™, Thermo Scientific™), 50-mL conical tubes, and 2D barcode-labeled storage boxes. All wetted surfaces meet USP extractables testing criteria for pharmaceutical-grade stainless steel. While not FDA 21 CFR Part 11–validated out-of-the-box, the freezer’s RS-232 output supports third-party audit trail software integration for regulated biobanking applications. Manufacturing adheres to ISO 9001:2000; electrical safety complies with IEC 61010-1:2010 requirements for laboratory equipment.

Software & Data Management

The freezer operates via a microprocessor-based controller with real-time temperature display, setpoint adjustment, and event log retention (last 100 entries). Optional RS-232 connectivity enables bidirectional communication with laboratory information management systems (LIMS) or environmental monitoring platforms (e.g., TempTale®, SensiLog™). Logged parameters include chamber temperature (°C), compressor run time (%), ambient temperature, alarm timestamps, and door-open duration. Data export follows ASCII comma-delimited format compatible with Excel, MATLAB, and Python pandas workflows. No proprietary cloud service or firmware subscription is required—local data capture and archival remain fully under end-user control.

Applications

This ultra-low temperature freezer serves critical roles in clinical biobanking, translational research, and industrial biomanufacturing. It is routinely deployed in blood bank facilities for red blood cell glycerolization storage, in vaccine development labs for lyophilized antigen stabilization, and in academic genomics cores for preserving DNA/RNA extraction kits and CRISPR-Cas9 reagent stocks. Additional use cases include cryopreservation of stem cell lines (e.g., iPSCs, MSCs), long-term archiving of marine microbiome samples, cold-chain validation studies for diagnostic assay kits, and low-temperature material science testing of polymer-based drug delivery carriers. Its compact footprint (2110 × 885 × 1095 mm) and 1.89 m total height enable installation in standard-height laboratory corridors and cleanroom anterooms without structural modification.

FAQ

What is the recommended ambient operating temperature range?
The unit is rated for continuous operation in ambient temperatures from +10 °C to +35 °C, with optimal performance between +18 °C and +25 °C.
How often should the condenser dust filter be cleaned?
Under typical laboratory conditions, inspect and clean the front-access filter every 30 days; increase frequency to weekly in high-dust environments such as animal housing or industrial prep labs.
Can the freezer be integrated into a building management system (BMS)?
Yes—via optional RS-232 output, using Modbus RTU or custom ASCII protocol mapping; contact technical support for pinout documentation and command syntax.
Is validation documentation available for IQ/OQ/PQ protocols?
Factory-generated calibration certificates (NIST-traceable thermistor verification) and FAT reports are provided with each unit; site-specific OQ templates compliant with ISO/IEC 17025 are available upon request.
What maintenance is required beyond routine cleaning?
Annual inspection of refrigerant charge integrity, door gasket compression force measurement, and evaporator coil visual inspection for frost accumulation are advised; no lubrication of compressors or fans is permitted.