-40 Degree Freezer: The Cold Standard for Ultra-Low Storage

June 25, 2025

What is a Deep Freezer?

A -40 degree freezer, also known as a deep freezer, is a specialized cooling equipment designed to keep extremely low temperatures for extended periods of time. These freezers are not your everyday appliances—they're powerful machines essential for industries where precise temperature control is critical.

Unlike usual household freezers, which typically go down to around -18°C, laboratory freezers, low temperature freezers, and ultra-low temperature freezers can reach much lower levels. Units operating at -40°C or even -80°C are essential for safely storing biological samples, chemicals, pharmaceuticals, and other sensitive materials. They are especially vital for OEMs, engineering firms, and research institutions requiring stable, long-term storage under super cold conditions.

Classification of Deep Freezers

Low Temperature Freezers

These operate at temperatures around -20°C to -40°C. A -40 degree freezer offers the reliability and temperature consistency needed for many laboratory and industrial uses, including the storage of vaccines, enzymes, and raw materials. It's an ideal middle-ground solution when ultra-low isn't necessary but precision still is.

Ultra-Low Temperature Freezers

Ultra-low temperature (ULT) freezers work between -60°C and -86°C, and sometimes even lower. These are often used biomedical applications, such as storing RNA, DNA, and other sensitive biological materials. Also, they are quite popular for vaccines, where ULT are necessary. They require robust insulation, advanced temperature controls, leakage detections, and dependable alarm systems.

Mirai Intex Deep Freezing Solutions

At Mirai Intex, we specialize in developing advanced cooling solutions using air-cycle refrigeration—an eco-friendly technology that eliminates the use of harmful refrigerants and oils. Our freezers are built for high performance, low maintenance, and complete reliability.

Our product lineup includes:

MIRAI X CRYO series: Offering a wide temperature range cooling systems from +90°C to -160°C, perfect for both heating and ultra-deep freezing applications in research and industry. Heating can help in the defrosting process. Those machines can be used not only for process cooling like lyophilization but also for storage.
Closed-cycle machines: Cooling systems that are designed for stable operations from -40°C to -160°C, ideal for laboratories and industrial applications requiring consistent negative temp conditions.

Whether kind of freezer you're looking for, Mirai Intex has a model tailored to your needs.

Types of Construction

Mirai Intex offers a full lineup of pre-engineered freezer systems that are ready for immediate deployment — no complex customization required. These units are especially well-suited for retrofit projects, making them an ideal choice for upgrading existing infrastructure without costly redesigns.

Our machines are available in a broad cooling capacity range from 10 kW to 150 kW, ensuring there’s a solution for virtually any application — from small-scale lab environments to large industrial processes. Depending on the specific cooling requirements and temperature demands of your workflow, Mirai systems provide reliable performance, seamless integration, and minimal commissioning effort.

Whether you’re starting from scratch or modernizing an existing facility, our robust, plug-and-play equipment delivers both technical and operational flexibility.

Applications Across Industries

A -40 degree freezer is indispensable in a wide range of fields:

Healthcare and pharmaceuticals: For storing vaccines, medicines, and biological samples.Also they are used in lyophilization and process cooling.
Research and laboratories: Maintaining the integrity of test specimens and samples.
Chemical and material science: Long-term storage of compounds and sensitive elements.
Food industry: Deep freezing for extended sample shelf-life and quality control.
Defense and aerospace: Simulation of extreme conditions for component testing.

Mirai Intex offers engineered ready cooling solutions tailored to each of these use cases, ensuring reliable performance and temperature stability.

All projects that can be published are available on page References.

How to Choose the Right -40°C Freezer

Technical Characteristics

Key features include insulation quality, compressor type, air-cycle vs. conventional systems, and overall efficiency. Mirai Intex units shine with their air-cycle technology, which is both maintenance-friendly and eco-conscious.

Storage Volume

Determine how much storage capacity you need. We offer everything that can be used in from small units for lab samples to large-scale industrial systems.

Temperature Requirements

Choose a model that suits your required temperature range. Our freezers are highly accurate, maintaining stable temps even during frequent access or variable loads, we have 0.5 degree control.

Safety and Monitoring

Especially in medical and lab settings, safety features like alarms, lockable doors, backup systems, and data logging are essential. Mirai freezers come standard with advanced monitoring and optional remote access for added security.

Maintenance and Care

Mirai Intex systems do not require frequent maintenance, as the operation of the air turbo compressor involves no friction between parts. This significantly reduces wear and tear, as well as the need for servicing the machine as a whole. The turbo compressor in these units is designed to operate maintenance-free for at least 10 years.

Why Choose Mirai Intex?

Mirai Intex delivers more than just freezers—we offer complete, future-ready cooling solutions built on cutting-edge air-cycle technology. Whether you're outfitting a lab or designing a turnkey OEM system, our products deliver long-term value and peace of mind.

Our advantages:

Broad temperature range: from +90°C to -160°C (Mirai X CRYO) and -40°C to -160°C (closed-cycle machines)
Oil-free, refrigerant-free operation that is always available and not subject to any legal regulations or restrictions.
Remote monitoring system and remote access system
HTF leakage detection. In case of leakage even the drop of HTF in the system, the system alarm and can even stop the work of the cooling machine.
Fast restart of the system during 30 seconds to the set parameters without operator. It can be crucial in case of electricity failure on the customer side or other unexpected situations.
Flexible temperature changes, you can change temperature during the process as you want to.
Industrial-grade durability of the system and reliability. Low maintenance of the system.
Precision control of the temperature under load and possibility of part-load operation

Final Thoughts

In industries where quality, safety, and temperature control matter, a -40 degree freezer is more than a storage unit—it's a critical part of the infrastructure. From labs to factories, from biotech to aerospace, Mirai Intex freezers ensure your materials stay safe, stable, and ready when you need them.

Explore the full range of deep freezer, lab freezer, and ultra-low temperature freezer systems at Mirai Intex. We’re ready to help you find the right solution for your super cold storage challenges.