What is a Liquid Nitrogen Dewar?

2022-08-12 10:03:41

In terms of sample freezing, many users choose liquid nitrogen dewars. Why?

There are so many cryogenic containers on the market, how can you identify it, and what is this liquid nitrogen dewar?

What is a Liquid Nitrogen Dewar?

The liquid nitrogen dewar is a biological container for storing liquid nitrogen and samples. It can maximize the low temperature advantages of liquid nitrogen and minimize the volatilization characteristics of liquid nitrogen.

In short, the liquid nitrogen Dewar bottle can slow down the volatilization of liquid nitrogen and store it, so as to achieve the purpose of quick freezing of samples without harming the activity.

Such a unique function comes from its structure and materials.


The full name of the liquid nitrogen dewar structure is “multi-layer high vacuum insulation structure”, which is divided into two layers: inner tank and outer tank, There is a vacuum interlayer between the inner and outer bladders, and the adsorption and heat insulation materials are wrapped in this interlayer to absorb and isolate external heat and reduce the volatilization of liquid nitrogen.


The inner and outer liner of the liquid nitrogen dewar are made of aviation aluminum, which is high in strength but light in weight, corrosion-resistant and easy to carry. The important thing is that this material has good thermal insulation performance, which is better than ordinary aluminum alloy and stainless steel.

In addition, many countries and regions are accustomed to calling the liquid nitrogen supply tank a liquid nitrogen dewar, which is a Liquid nitrogen supply container.

Used for filling other cryogenic containers with liquid nitrogen, 304 stainless steel material, vacuum interlayer + thermal insulation material, with valve and pressurization system, which can self-pressurize and output liquid nitrogen.

What is a Liquid Nitrogen Dewar