Tianfeng TF-86-938D-LA Ultra Low Temperature Freezer for Food & Biological Sample Storage

Overview

The Tianfeng TF-86-938D-LA Ultra Low Temperature Freezer is an engineered solution for long-term cryogenic storage of temperature-sensitive biological and food-grade materials. Designed and manufactured in Shanghai under ISO 9001:2000–certified quality management systems, this unit operates within a stable thermal range of −40 °C to −86 °C—optimized for preservation integrity of perishable biospecimens including plasma, vaccines, microbial cultures, semen, tissue samples, and frozen food matrices requiring strict cold chain adherence. Its thermodynamic architecture integrates dual-stage cascade refrigeration with imported compressors and high-efficiency heat exchangers, enabling consistent thermal uniformity across the full 938 L chamber volume. The hybrid condensation system—combining passive natural convection and active fan-assisted airflow—enhances operational resilience in ambient environments up to 35 °C and mitigates performance degradation under dust-prone or high-humidity conditions common in industrial laboratories and blood bank facilities.

Key Features

• Stainless steel (AISI 304) interior chamber and inner doors—corrosion-resistant, non-porous, and compliant with GLP-aligned cleaning protocols.
• Four independently sealed inner doors minimize cold air loss during frequent access, improving energy efficiency and thermal recovery time.
• Radius-rounded internal corners and removable, height-adjustable stainless steel shelving facilitate complete sanitation and reduce microbial retention risk.
• Dual mechanical locking system: physical door lock plus dedicated power lock ensures unauthorized access prevention and regulatory audit readiness.
• Integrated alarm system with real-time monitoring of temperature deviation, door status, power interruption, and compressor fault—configurable thresholds via front-panel interface.
• RS-232 serial port (optional) enables integration with laboratory information management systems (LIMS) or centralized environmental monitoring platforms for traceable data logging.
• Low-noise operation (≤57 dB[A]) achieved through vibration-damped compressor mounting, acoustic insulation layers, and optimized airflow ducting—suitable for shared lab spaces.
• Eco-conscious refrigerant formulation meeting international ozone depletion potential (ODP = 0) and global warming potential (GWP) mitigation standards.

Sample Compatibility & Compliance

The TF-86-938D-LA supports storage of diverse sample types including but not limited to: human and animal-derived biologicals (serum, PBMCs, stem cells), diagnostic reagents, lyophilized proteins, nucleic acid extracts, vaccine formulations, and frozen food reference standards. Its thermal stability profile meets requirements for long-term archival per ISO 20387:2018 (Biobanking), ASTM F2697-21 (Standard Specification for Ultra-Low Temperature Freezers), and WHO Technical Report Series No. 961 Annex 6 (Good Distribution Practice for Medicinal Products). All electrical components conform to IEC 61010-1 safety standards for laboratory equipment. The unit’s design accommodates standard cryoboxes (e.g., 10 × 10 format), rack-based vial storage systems, and custom trays without compromising airflow distribution.

Software & Data Management

While the base model features a microprocessor-controlled digital display with setpoint adjustment, password-protected parameter modification, and event-driven alarm history (last 100 entries), optional RS-232 connectivity allows external data acquisition using third-party software compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, audit trails, and user-level access control. Temperature logs can be exported in CSV format for inclusion in quality assurance documentation, regulatory submissions (e.g., IND/MAA dossiers), or internal CAPA investigations. Firmware updates are performed via secure USB interface, ensuring continued alignment with evolving data integrity expectations in GxP-regulated environments.

Applications

This ultra-low temperature freezer serves mission-critical roles across multiple sectors: clinical biobanks maintaining IRB-approved human specimen repositories; public health laboratories storing epidemic-response vaccines and pathogen isolates; food safety testing centers archiving reference samples for mycotoxin or microbiological validation studies; R&D departments in agri-biotech developing cryopreserved probiotic strains; and contract research organizations (CROs) supporting Phase III clinical trial material storage under ICH-GCP guidelines. Its footprint-optimized dimensions (2000 mm height) allow installation in standard-height laboratories without structural modification, while the 938 L capacity supports scalable inventory growth without requiring parallel unit deployment.

FAQ

What is the recommended ambient operating temperature range?
The unit is rated for continuous operation in ambient environments between 10 °C and 35 °C, with relative humidity ≤80% non-condensing.
How often should the condenser filter be cleaned?
Under typical laboratory conditions, inspect and clean the removable dust filter every 3 months; increase frequency to monthly in high-particulate environments.
Does the freezer support temperature mapping validation?
Yes—its uniform temperature distribution (±2.5 °C at −80 °C, per ASTM F2697-21 Annex A3) and calibrated PT100 sensor array enable IQ/OQ/PQ execution using industry-standard mapping protocols.
Is remote monitoring capability available?
RS-232 output supports connection to building management systems (BMS) or cloud-based monitoring platforms via compatible gateway hardware (sold separately).
What maintenance intervals are required for compressor longevity?
No scheduled oil servicing is needed—the hermetic compressors use sealed lubrication systems. Annual verification of refrigerant charge integrity and electrical safety testing are advised per ISO/IEC 17025 calibration laboratory recommendations.