Refrigerator & Freezers : A Buying Guide
A refrigerator typically maintains a temperature range of2°C ~ 8°C, ideal for short-term storage of vaccines, reagents, medicines, or perishable food. It keeps items cool, slows down bacterial growth, and helps preserve freshness without freezing.
A freezer, on the other hand, operates at much lower temperatures — usually –below -20 °C, and ultra-low freezers can reach –183 °C（Large Capacity Liquid Nitrogen Cryogenic Storage Tank for Biological Sample Preservation）. Freezers are designed for long-term preservation, keeping biological samples, DNA/RNA, cell cultures, or frozen food stable and safe by halting microbial activity.
Help You Choose
Direct Cooling vs Fan Cooling:
Which Is Better for Lab
| Comparison | Fan Cooling (Frost-Free, Forced Air) | Direct Cooling (Static) |
| Basic Principle | A fan circulates cold air from the evaporator evenly throughout the chamber | The evaporator is attached to the inner liner, cooling the chamber by natural convection |
| Cooling Diagram | Compressor → Condenser → Evaporator → Fan Circulation → Airflow Distribution | Compressor → Condenser → Evaporator (directly cooling the liner) |
| Defrost Method | Automatic Defrost (Frost-Free) | Manual Defrost (Frost Accumulation) |
| Temperature Uniformity | Excellent: Small temperature variations (within ±3°C), ensuring consistent storage conditions | Poor: Variations can exceed 10°C, with cold spots near the evaporator and warmer areas near the door |
| Energy Consumption | Slightly higher (due to fan and defrost heater) | Lower in normal operation, but manual defrosting and re-cooling require high energy |
Why Choose Our Laboratory Refrigerators? Most of our refrigerators use fan cooling systems equipped with German EBM silent fans, offering:
Digital Temperature & Humidity Display
Multi-Alarm System
LED Lighting
Optional data logger
Choose a refrigerator
The most common storage temperature range is 2~8°C
Laboratory refrigerators are the cornerstone of scientific research and medical work, with the core mission of ensuring the activity and stability of stored samples. We understand that different storage needs require different solutions.
1. General Laboratory Storage (2~8°C)
2. Professional Vaccine & Pharmaceutical Storage (2~8°C)
Other temperatures
2~8℃
Other
Choose a Freezer
| Temperature Range (°C) | Typical Applications | Equipment Type |
| -25°C | Ideal for short-term storage of enzymes, reagents, and routine laboratory samples. | Laboratory Freezer |
| -45°C | Suitable for medium-term preservation of temperature-sensitive samples. | Laboratory Freezer |
| -65°C | Designed for storing cells, plasma, and certain tissue samples. | Deep Freezer |
| -86°C | The most widely used solution for long-term storage of DNA/RNA, cells, blood products, vaccines, and pathogens. | Ultra-Low Temperature Freezer |
| <-100°C | Best for high-value or highly active samples such as stem cells, embryos, and critical research materials; often used as a liquid nitrogen alternative. | Ultra-Deep Freezer / Mechanical LN2 Alternative |
| -183°C | Close to liquid nitrogen (-196°C), used for highly active cells, embryos, and critical research samples. | LN2 Cooling System / Ultra-Low Freezer |
Choosing the right laboratory freezer depends on the type of samples you need to store and the required storage duration. Below is a quick comparison of common temperature ranges and their applications:
How to Choose the Right Freezer?
Routine laboratory samples (short-term): -25°C to -45°C freezers are sufficient.
Long-term biological storage: -65°C to -86°C ultra-low temperature freezers are the most common choice.
High-value or highly active samples (stem cells, embryos, pathogens): <-100°C storage provides maximum safety and stability, often used as a liquid nitrogen alternative.
By selecting the correct temperature range, you can ensure the integrity, stability, and longevity of your laboratory samples.
>-86°C
<-100°C
-183°C
