For most people, cryogenesis evokes sci-fi images.

Instead, it is an existing technology, commonly used in laboratories and research institutes.

But what is a cryogenic freezer, how does it work, what is it for and how does it differ from other laboratory freezers?

Let's see it together.

How does a cryogenic freezer work?

Cryogenic freezers are a type of laboratory freezer capable of reaching very low temperatures thanks to cryogenesis technology.

How does cryogenesis work?

Cryogenesis is a cooling technology that uses nitrogen as a refrigerant, an odorless and colorless gas used in the liquid state.

Liquid nitrogen has a temperature of -196° and therefore, when used as a refrigerant, it can cause the sample to be refrigerated to reach temperatures below 150°.

The sample is placed inside the cryogenic freezer where it is surrounded by liquid nitrogen which briefly lowers its temperature and maintains it for as long as necessary, from a few seconds up to several days, depending on the needs.

What is a Cryogenic Freezer used for?

Cryogenic freezers are mainly used for storing biological samples from laboratories and research institutes.

These biological samples can be, for example, stem cells, which have long been used in medical research, or DNA samples which carry out scientific research aimed at the treatment of tumors and other pathologies.

They can also be used to store food or medicines but this use is rarer because there are other tools capable of performing this function with less energy expenditure. Let's see which ones.


Difference between Cryogenic Freezers and Laboratory Freezers

Cryogenic freezers are a type of laboratory freezer, a category of technological tools that we can divide into three different classes.


  • Simple laboratory fridges and freezers: they are used by laboratories, research institutes but also by pharmacies for the storage of most medicines.

They touch temperatures below -15°, we talked about it in detail here.


  • Laboratory Ultra Freezers: they are the next step and reach about 90 degrees below zero.

They are used in research for the preservation of biological samples and some special drugs, such as vaccines. We have analyzed them here.


  • Cryogenic Freezers: finally we come to cryogenic freezers which are the instrument capable of reaching the lowest possible temperatures, i.e. -150°.

They are also distinguished from other instruments by the technology used, the aforementioned liquid nitrogen.


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The FDM Ultra Freezers

Active for over 70 years in the sector, FDM - Environmental Makers produces laboratory freezers and ultra-freezers using the most modern technologies.

We have a wide choice of models of both laboratory refrigerators and freezers that adapt to the most diverse needs.

For further doubts and questions, please do not hesitate to contact us.

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