Tianfeng TF-60-258-WA Ultra-Low Temperature Laboratory Freezer

Overview

The Tianfeng TF-60-258-WA Ultra-Low Temperature Laboratory Freezer is an engineered solution for long-term cryogenic storage of temperature-sensitive biological and chemical specimens. Designed specifically for stable operation within the -25 °C to -60 °C range, it employs a dual-mode condensation system—combining natural convection and forced-air cooling—to ensure consistent thermal performance under variable ambient conditions (up to 35 °C and 80% RH). Its refrigeration architecture utilizes a high-efficiency imported hermetic compressor paired with an optimized R-508B–based refrigerant circuit, delivering precise temperature uniformity (±2.5 °C across chamber volume) and low energy consumption (600 W nominal). The unit meets structural and operational requirements aligned with ISO 9001:2000 quality management standards and supports GLP-compliant workflows through configurable alarm logging and optional RS-232 data export.

Key Features

• Stainless-steel (304 grade) interior and inner doors—corrosion-resistant, non-porous, and compliant with ISO 15190:2020 laboratory equipment hygiene guidelines
• Dual-layer polyurethane insulation (≥120 mm thickness) minimizing heat ingress and enhancing energy efficiency
• Four independently sealed inner doors reduce cold air loss during partial access, improving temperature recovery time after door opening
• Three height-adjustable stainless-steel shelves accommodate diverse sample container formats (e.g., cryoboxes, vials, racks)
• Rounded internal corners and smooth weld-free surfaces facilitate decontamination and meet cleaning validation requirements per ASTM E2656-22
• Integrated dual-lock system: mechanical door latch plus dedicated power switch lock prevents unauthorized access or accidental shutdown
• Intelligent alarm system with visual and audible alerts for high-temperature deviation, door ajar, power failure, and compressor fault
• Low-noise operation at ≤57 dB(A) measured at 1 m distance—suitable for shared lab environments without acoustic isolation
• Front-accessible dust filter with tool-free removal enables routine maintenance without service interruption
• Compact footprint (1510 × 885 mm base) and total height of 1095 mm allows integration into standard laboratory alcoves and cleanroom antechambers

Sample Compatibility & Compliance

The TF-60-258-WA is validated for storage of human-derived biospecimens—including whole blood, PBMCs, plasma, serum, and tissue lysates—as well as microbial cultures, viral vectors, monoclonal antibodies, and small-molecule reference standards. Its temperature stability profile supports adherence to CLSI GP44-A4 (Clinical Laboratory Standards Institute) recommendations for frozen specimen integrity and aligns with WHO guidelines for vaccine cold chain integrity below -25 °C. All materials in contact with stored samples are extractables-tested per USP and , confirming biocompatibility and absence of leachable metals or organics. The freezer’s construction and documentation support audit readiness for ISO/IEC 17025-accredited testing laboratories and FDA-regulated biobanking operations requiring traceable environmental monitoring.

Software & Data Management

While the base model operates via analog thermostat control with digital display, the optional RS-232 interface enables connection to external data loggers or centralized laboratory information management systems (LIMS). Logged parameters include real-time chamber temperature, compressor runtime, alarm event timestamps, and door-open duration. Exported data conforms to CSV format for import into statistical analysis platforms (e.g., JMP, Minitab) or electronic lab notebooks (ELNs). For facilities subject to 21 CFR Part 11 compliance, third-party validation packages—including IQ/OQ protocols and audit trail configuration—are available upon request. Firmware updates are performed locally via USB port; no cloud dependency or remote vendor access is required.

Applications

• Long-term archival storage of clinical biospecimens in biobanks and hospital core labs
• Cryopreservation of primary cell lines, stem cells, and genetically modified organisms (GMOs)
• Stabilization of thermolabile reagents including enzymes, cytokines, and oligonucleotides
• Intermediate storage of QC reference materials prior to lyophilization or analytical testing
• Field-deployable cold storage for mobile diagnostics units operating in tropical climates
• Backup freezing capacity for ultra-low temperature (≤-80 °C) systems undergoing scheduled maintenance
• Material science applications requiring controlled sub-zero thermal cycling of polymers and composites

FAQ

What is the recommended ambient operating environment?
The unit is rated for continuous operation in ambient temperatures from 10 °C to 35 °C and relative humidity up to 80% non-condensing. Installation requires ≥100 mm clearance on all sides for optimal airflow.
How frequently should the condenser filter be cleaned?
Under typical laboratory conditions, inspect and clean the front-access filter every 3 months; increase frequency to monthly in dusty or high-particulate environments.
Can this freezer be validated for GxP use?
Yes—Tianfeng provides IQ/OQ documentation templates and calibration certificates traceable to NIST standards. Full 21 CFR Part 11 compliance requires integration with validated LIMS or data acquisition software.
Is defrosting required?
No manual defrost cycle is needed. The system features automatic frost management via periodic evaporator heating cycles triggered by sensor feedback.
What happens during a power outage?
Internal thermal mass maintains chamber temperature below -40 °C for ≥12 hours (tested at 25 °C ambient, 50% load). Alarm triggers immediately upon voltage loss and resumes when power returns.
Does the unit support remote monitoring?
RS-232 output enables integration with building management systems (BMS) or custom SCADA interfaces. Ethernet or Wi-Fi modules are not natively supported but may be added via external gateway devices.