Biobase BDF-40V268 -40°C Low-Temperature Freezer
The BDF-40V268 is a high-performance vertical -40°C freezer designed for long-term storage of temperature-sensitive biological materials, including plasma, vaccines, enzymes, and cell lines in research, pharmaceutical, and clinical settings. Featuring a galvanized steel exterior with a baked-on epoxy powder coating for corrosion resistance and a seamless ABS plastic interior, it incorporates 100 mm thick CFC-free polyurethane foam insulation to achieve superior thermal efficiency and energy retention during power outages. Safety enhancements include a double-door gasket system with heated frame to prevent frost ingress, an electronic high/low temperature limiter with auto-shutdown, and a robust door lock with keyed access, ensuring compliance with WHO, FDA, and ISO 14644 standards for cryogenic storage integrity.
Description
Performance and Temperature Control: Provides a stable operating range of -30°C to -40°C with 0.1°C display resolution and ±1°C accuracy, powered by a direct-cooling cascade refrigeration system using eco-friendly R290 refrigerant for minimal global warming potential. The microprocessor-based controller maintains ≤2°C uniformity across the chamber, even with 50% load variations, while the adaptive defrost cycle minimizes temperature fluctuations (<0.5°C excursion). High-efficiency evaporator fins coated with hydrophilic aluminum ensure rapid pull-down from +25°C to -40°C in under 120 minutes, supporting reliable preservation of cryopreserved tissues or diagnostic reagents in fluctuating ambient conditions up to 35°C.
Storage Capacity and Configuration: Delivers 268 L of net usable volume, accommodating up to 192 standard 2 mL cryovials or 120 × 100 mL serum samples across six removable stainless-steel shelves (each 35 kg capacity) with adjustable heights in 75 mm increments for optimized inventory. The internal dimensions of 510 × 570 × 920 mm (W × D × H) allow for vertical basket inserts or rack systems compatible with 2-inch or 3-inch cryo-boxes, facilitating organized FIFO access. Vapor-tight inner doors (two per chamber) reduce cold air loss by 60% during frequent openings, while adjustable LED lighting (≥400 lux) illuminates contents without introducing heat or shadows.
User Interface and Operational Features: Integrated 4.7-inch LED display panel offers real-time monitoring of temperature, ambient conditions, and compressor status, with intuitive membrane switches for setpoint adjustments and multilingual menus (English, Chinese, Spanish). Programmable alarms trigger for deviations >±2°C, door ajar (>5 min), or power events, with remote notification via dry-contact relays or optional RS485/USB data ports. The event log captures 5,000+ records for audit trails, and a manual defrost override with countdown timer streamlines maintenance, making it user-friendly for lab technicians in biotech facilities or vaccine depots.
Sterilization and Maintenance: The non-magnetic ABS interior with coved seams supports decontamination using 70% ethanol, sodium hypochlorite, or vaporized hydrogen peroxide, while the drip tray auto-evaporates condensate to inhibit microbial growth. Self-diagnostic functions at startup verify sensor calibration and fan operation, with filterless condenser design eliminating routine dust removal. The hermetic compressor requires no oil changes, and tool-free shelf/basket removal enables full interior access; annual certification is simplified with built-in test ports for temperature mapping, supported by a 2-year warranty on refrigeration components.
Electrical and Environmental Specifications: Functions on AC 220V/50Hz (110V/60Hz adaptable) at 350W, incorporating a surge protector and low-voltage operation down to 180V for resilience in unstable grids. Rated for ambient temperatures of 10–35°C and ≤80% relative humidity, it operates at <52 dB noise level with vibration-dampening feet. Power consumption averages 2.5 kWh/24h at -40°C, promoting sustainability in energy-conscious labs, with an optional backup battery module sustaining alarms for 48 hours.
Dimensions and Installation Flexibility: External profile of 673 × 676 × 1630 mm (W × D × H) weighs 120 kg, with a slim 75 mm wall thickness for easy placement in tight spaces like core facilities or mobile units. The reversible door and adjustable leveling legs (up to 50 mm) accommodate various floor types, requiring only 10 cm rear clearance for ventilation. Pre-assembled with a 2.5 m power cord and universal plug, it installs in <20 minutes, and optional casters enable relocation without downtime.
- Throughput and Workflow: Handles up to 200 samples per full load with <45-second door recovery, enabling efficient batch storage/retrieval for 300+ daily operations in vaccine cold chains or biobanking.
- Detection and Monitoring: Dual PT1000 platinum sensors (chamber and evaporator) with 0.01°C precision; records 10,000+ data points including trends and alarms for regulatory validation.
- Detection Principle: Cascade direct cooling with finned evaporators and variable-speed fans for stratified uniformity, augmented by manual/auto defrost to preserve cryogenic microenvironments.
- Additional Features: Integrated USB thermal printer for 7-day charts; Ethernet connectivity for IoT integration; supports LN2 backup injection ports for ultra-low excursions.
- Data Storage: 2-year onboard flash memory for compressed graphs and exports in PDF/CSV; secure admin access with timestamped logs.
- Sample Handling Modes: Versatile for cryovials, blood plasma bags, tissue blocks, or microbial stocks; adaptable with stainless-steel racks for automated inventory systems or barcode tracking.
