25℃ Freezer
Precision laboratory freezer maintaining -10°C to -25°C with ±0.1°C accuracy, microprocessor control, and comprehensive alarm monitoring for critical sample storage.
| Automation Level | semi-automated |
| BDF-25H210 | BDF-25H310 |
| 210L | 310L |
| Temp. Range | -10~-25℃ |
| Temp. Accuracy | 0.1℃ |
| Temp. Uniformity | ≤3℃ |
The ConductScience 25℃ Freezer is a precision low-temperature storage unit designed for laboratory applications requiring controlled freezing conditions between -10°C and -25°C. This direct-cooling system employs microprocessor control with LED display and comprehensive alarm monitoring to maintain critical biological samples, reagents, and specimens at stable sub-zero temperatures.
The unit features temperature accuracy of ±0.1°C with uniformity and stability within ±3°C throughout the chamber. Multiple capacity options (110L, 210L, 310L) accommodate varying laboratory storage requirements. The system achieves rapid cooling to -25°C within 2 hours and maintains recovery to -22°C within 5 minutes following door openings, critical for preserving sample integrity during routine access.
How It Works
The freezer operates through direct-cooling refrigeration using R290 refrigerant in a closed-loop system. The microprocessor control continuously monitors chamber temperature via integrated sensors, adjusting compressor operation to maintain setpoint temperature within the -10°C to -25°C range. The direct-cooling design eliminates the need for circulation fans, reducing temperature fluctuations and providing uniform cooling throughout the storage chamber.
Temperature regulation occurs through proportional control algorithms that modulate cooling cycles based on thermal load and ambient conditions. The LED display provides real-time temperature monitoring, while integrated alarm systems monitor for temperature deviations, power interruptions, and system faults. Recovery time specifications ensure rapid return to storage temperature following brief door openings, critical for maintaining sample integrity during routine laboratory access.
Features & Benefits
Automation Level
- semi-automated
BDF-25H210
- BDF-25H310
210L
- 310L
Temp. Range
- -10~-25℃
Temp. Accuracy
- 0.1℃
Temp. Uniformity
- ≤3℃
Temp. Stability
- ≤3℃
Recovery Time(Recover to -22℃ in an ambient temp.
- ≤5min
Cooling Time(Cool down to -25℃ in an ambient temp.
- ≤2h
Control System
- Microprocessor control
Alarm
- High and low temperature alarm, thermostat fault alarm, power failure alarm(48h)
Refrigeration Type
- Direct-cooling
Refrigerant
- R290/50g
Brand
- ConductScience
Research Domain
- Analytical Chemistry
- Cell Biology
- Clinical Diagnostics
- Food Science
- Microbiology
- Pharmaceutical QC
Capacity
- 110L
Display Type
- LED display
Weight
- 58.0 kg
Dimensions
- L: 60.0 mm
- W: 52.0 mm
- H: 46.0 mm
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Temperature Accuracy | ±0.1°C precision control | Basic models often provide ±1°C to ±2°C accuracy | Precise temperature control maintains sample integrity and reagent stability critical for reproducible research results |
| Temperature Uniformity | ±3°C throughout chamber volume | Entry-level units may have ±5°C to ±8°C temperature gradients | Consistent conditions across all storage locations prevent sample degradation from temperature variations |
| Recovery Performance | 5-minute recovery to -22°C | Standard models typically require 10-15 minutes | Rapid temperature recovery minimizes sample exposure time during routine laboratory access |
| Alarm System | Multi-function alarms with 48-hour power failure backup | Basic models often have simple temperature alarms only | Comprehensive monitoring protects valuable samples against multiple failure modes including power outages |
| Control System | Microprocessor control with LED display | Mechanical thermostats with analog displays are common | Digital control provides precise temperature regulation and continuous monitoring without manual adjustment |
| Cooling Technology | Direct-cooling with R290 refrigerant | Varies by model and manufacturer | Environmentally-friendly refrigerant with efficient performance and reduced circulation-induced temperature fluctuations |
This freezer combines precise microprocessor control with rapid recovery performance and comprehensive alarm monitoring. The ±0.1°C temperature accuracy and multi-function alarm system with power failure backup provide reliable sample protection for critical laboratory storage applications.
Practical Tips
Verify temperature accuracy quarterly using a calibrated reference thermometer placed in the geometric center of the chamber after 4-hour thermal equilibrium.
Why: Regular calibration verification ensures temperature accuracy remains within specification for critical sample storage.
Clean condenser coils monthly and inspect door seals for proper closure to maintain cooling efficiency.
Why: Clean heat exchange surfaces and proper sealing prevent energy waste and temperature fluctuations.
Pre-cool samples to refrigeration temperature before loading and minimize door opening frequency and duration.
Why: Reducing thermal load decreases recovery time and prevents temperature excursions that could affect sample integrity.
If temperature recovery exceeds 5 minutes, check door seal integrity and verify adequate ventilation clearances around the unit.
Why: Poor sealing or inadequate ventilation are common causes of extended recovery times and temperature instability.
Record temperature readings during sample storage and retrieval sessions to document storage conditions for regulatory compliance.
Why: Temperature documentation provides traceability required for GLP compliance and sample integrity verification.
Ensure proper ventilation in the installation area when using R290 refrigerant and follow manufacturer guidelines for refrigerant safety.
Why: Hydrocarbon refrigerants require adequate ventilation to prevent accumulation in enclosed spaces.
Organize samples in clearly labeled containers with inventory tracking to minimize search time during door openings.
Why: Efficient sample organization reduces door-open time and temperature exposure while improving laboratory workflow.
Test alarm functions monthly including temperature limits and power failure simulation to verify protective systems.
Why: Regular alarm testing ensures sample protection systems function properly when actual failure conditions occur.
Setup Guide
What’s in the Box
- 25℃ Freezer main unit
- Power cord
- Interior shelving (typical)
- User manual and operating instructions
- Temperature calibration certificate (typical)
- Alarm system documentation
Warranty
ConductScience provides a comprehensive 1-year manufacturer warranty covering parts and labor with dedicated technical support for installation guidance, troubleshooting, and maintenance procedures.
Compliance
References
Background reading relevant to this product:
What is the temperature recovery time after frequent door openings during sample retrieval?
The unit recovers to -22°C within 5 minutes following door openings in ambient temperature conditions, minimizing sample temperature exposure during routine access.
How does the alarm system function during power outages?
The system provides power failure alarm with 48-hour backup capability, along with high/low temperature alarms and thermostat fault monitoring for comprehensive sample protection.
What refrigerant type is used and are there environmental considerations?
The unit uses R290 hydrocarbon refrigerant (50g capacity), which is environmentally-friendly with low global warming potential compared to traditional refrigerants.
Can the temperature setpoint be adjusted throughout the operating range?
Yes, the microprocessor control system allows temperature adjustment within the full -10°C to -25°C operating range with ±0.1°C accuracy maintained throughout.
What is the temperature uniformity across different chamber locations?
Temperature uniformity is maintained within ±3°C throughout the chamber volume, with temperature stability also within ±3°C over time.
How long does initial cooldown take when first powering the unit?
The cooling system achieves -25°C target temperature within 2 hours from ambient temperature during initial startup or after extended shutdown periods.
What capacity options are available for different laboratory storage needs?
The system is available in three capacity configurations: 110L, 210L, and 310L models to accommodate varying sample storage requirements.
Is external temperature monitoring or data logging possible?
Consult product datasheet for specific data interface capabilities and external monitoring system compatibility options.
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