-40°C Freezer 368L 528L
Ultra-low temperature freezers providing -15°C to -40°C storage with ±0.1°C accuracy in 368L and 528L capacities for biological sample preservation and biobanking applications.
Louise Corscadden, PhD
Neuroscience · ConductScience
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The -40°C Freezer series provides reliable ultra-low temperature storage for biological samples, reagents, and temperature-sensitive materials requiring preservation below standard freezing temperatures. Available in 368L and 528L capacities, these direct-cooling freezers maintain precise temperature control from -15°C to -40°C with ±0.1°C accuracy, supported by comprehensive alarm monitoring systems for continuous sample security.
Featuring dual-compressor refrigeration systems with R290 refrigerant, stainless steel interior construction, and microprocessor-controlled temperature management, these units support critical biobanking and sample storage workflows in research and clinical laboratories. The manual defrost design incorporates wire-on-tube condenser technology and built-in copper tube evaporator for consistent temperature distribution throughout the storage chamber, ensuring sample integrity during long-term preservation protocols.
How It Works
The freezer operates through a dual-compressor refrigeration system utilizing R290 (propane) refrigerant for efficient heat transfer and environmental compliance. The primary compressor initiates cooling cycles while the secondary compressor maintains temperature stability during frequent door openings or thermal load changes. Refrigerant circulates through the wire-on-tube condenser system, where heat exchange occurs with ambient air, before passing through the copper tube evaporator distributed throughout the storage chamber.
Microprocessor-controlled temperature management continuously monitors internal conditions via precision sensors, automatically adjusting compressor operation to maintain the set temperature within ±0.1°C. The direct-cooling design eliminates the need for forced air circulation, reducing temperature fluctuations and preventing sample desiccation. Manual defrost operation prevents ice buildup on evaporator surfaces while maintaining consistent cooling performance over extended operation periods.
Integrated alarm systems monitor temperature deviations, power failures, and door ajar conditions, providing audible and visual alerts to prevent sample loss. The stainless steel interior construction ensures chemical resistance and easy decontamination while providing uniform thermal conductivity for consistent temperature distribution throughout the storage volume.
Features & Benefits
Model
- BIO-BDF-40V368D
- BIO-BDF-40V528D
Automation Level
- semi-automated
Research Domain
- Analytical Chemistry
- Clinical Diagnostics
- Immunology
- Microbiology
- Pharmaceutical QC
Temperature Range
- -15~-40°C
Weight
- 30.0 kg
Dimensions
- L: 42.0 mm
- W: 43.6 mm
- H: 38.0 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Temperature Control Accuracy | ±0.1°C precision across -15°C to -40°C range | Entry-level models often provide ±0.5°C to ±1.0°C accuracy | Tighter temperature control preserves sample integrity and prevents degradation during long-term storage |
| Refrigeration System | Dual-compressor configuration with R290 refrigerant | Single-compressor systems with traditional refrigerants | Enhanced temperature stability and faster recovery after door openings or thermal loads |
| Storage Capacity Options | 368L and 528L capacity models available | Limited capacity options in ultra-low temperature range | Flexibility to select appropriate storage volume based on sample inventory requirements |
| Interior Construction | Stainless steel interior with copper tube evaporator | Aluminum or coated steel interiors | Superior chemical resistance and thermal conductivity for consistent temperature distribution |
| Defrost Operation | Manual defrost system | Automatic defrost cycles | Eliminates temperature fluctuations from automatic defrost cycles that could compromise sample stability |
| Temperature Monitoring | Comprehensive alarm system with multiple alert types | Basic temperature alarms with limited functionality | Enhanced sample protection through multi-parameter monitoring and immediate failure notification |
This dual-compressor freezer series offers superior temperature control accuracy and stability compared to single-compressor alternatives. The combination of ±0.1°C precision, R290 refrigerant efficiency, and comprehensive alarm monitoring provides reliable ultra-low temperature storage for critical biological samples.
Practical Tips
Perform temperature mapping quarterly using calibrated probes placed at multiple locations throughout the storage chamber.
Why: Verifies temperature uniformity and identifies any cold or warm spots that could affect sample integrity.
Clean condenser coils monthly and inspect door seals for wear or damage that could compromise temperature control.
Why: Maintains cooling efficiency and prevents temperature fluctuations from poor sealing.
Pre-cool storage containers and minimize door-open time to reduce thermal load on the refrigeration system.
Why: Reduces temperature recovery time and maintains stable storage conditions for existing samples.
If temperature alarms activate, verify door closure and check for excessive frost buildup before contacting technical support.
Why: Many temperature deviations result from simple operational issues that can be quickly resolved.
Maintain temperature logs and document all alarm events to establish performance history and support validation requirements.
Why: Provides evidence of proper sample storage conditions and facilitates troubleshooting of any issues.
Ensure adequate ventilation around the unit and never block condenser air flow with storage items or equipment.
Why: Prevents overheating and maintains safe operating conditions while ensuring optimal cooling performance.
Organize samples systematically with clear labeling and maintain inventory records to minimize search time during retrieval.
Why: Reduces door-open duration and thermal load while improving laboratory workflow efficiency.
Schedule manual defrost operations during planned maintenance windows when samples can be temporarily relocated to backup storage.
Why: Maintains optimal cooling performance while ensuring continuous sample protection during maintenance procedures.
Setup Guide
What’s in the Box
- Ultra-low temperature freezer unit
- Wire shelving system (typical)
- Temperature monitoring probes
- Power cord
- User manual and installation guide
- Alarm system documentation
- Performance verification certificate (typical)
Warranty
ConductScience provides standard 1-year manufacturer warranty covering parts and labor with comprehensive technical support for installation, calibration, and maintenance procedures.
Compliance
References
Background reading relevant to this product:
What temperature uniformity can I expect throughout the storage chamber?
The dual-compressor system with copper tube evaporator distribution maintains ±0.1°C accuracy. Temperature mapping should be performed during validation to verify uniformity at your specific storage locations.
How does the manual defrost operation affect sample storage?
Manual defrost eliminates automatic cycles that could cause temperature fluctuations. Schedule defrosting during planned maintenance windows when samples can be temporarily relocated.
What alarm capabilities are included for sample protection?
Comprehensive monitoring includes temperature deviation alarms, power failure notification, and door ajar alerts with both audible and visual indicators. Consult specifications for remote monitoring options.
How do the 368L and 528L models differ beyond capacity?
Both models utilize identical dual-compressor technology and temperature control systems. The larger 528L unit provides additional storage volume while maintaining the same ±0.1°C accuracy.
What maintenance is required for optimal performance?
Regular maintenance includes condenser coil cleaning, door seal inspection, and periodic manual defrost cycles. Temperature calibration verification should be performed annually or per institutional requirements.
Can the unit recover quickly after door openings?
The dual-compressor design provides rapid temperature recovery following door openings. Minimize door-open time and use organized sample storage to reduce thermal load impact.
How does R290 refrigerant compare to traditional refrigerants?
R290 provides efficient cooling with reduced global warming potential compared to traditional refrigerants, meeting environmental regulations while maintaining reliable ultra-low temperature performance.
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