Liquid Nitrogen Freezer Temperature

Over this temperature range liquid nitrogen looks much like boiling water.

Liquid nitrogen freezer temperature.

Liquid helium is also commonly used and allows for the lowest attainable temperatures to be reached. First it would be really expensive but more importantly it isn t necessary. Liquefied gases such as liquid nitrogen and liquid helium are used in many cryogenic applications liquid nitrogen is the most commonly used element in cryogenics and is legally purchasable around the world. Each freezer isn t completely filled with liquid nitrogen for a few reasons.

Liquid nitrogen freezers use liquefied carbon dioxide at 196 to freeze food or ingredients. However if the liquid nitrogen contacts the cellular formation the content will be damaged and become unusable. Modern vapor phase liquid nitrogen freezers are so well insulated that the sample space temperature is maintained at or below 190 c even if the lid is kept off. The cellular structure isn t completely destroyed preventing complete lost of moisture.

At normal atmospheric pressure nitrogen is a liquid between 63 k and 77 2 k 346 f and 320 44 f. Mve stock provides the ultimate in security for the breeding industry and are primarily used to store semen and embryos. 320 f boiling point at sea level it is produced industrially by fractional distillation of liquid air it is a colorless low viscosity liquid that is widely used as a coolant. In applications where storage temperatures above 150 c are acceptable laboratory personnel have had to accept these tradeoffs between usability and reliability in selecting among conventional mechanical and cryogenic refrigeration.

In its basic form a liquid nitrogen freezer is. Below 63 k it freezes into solid nitrogen. Because liquid nitrogen in a usual setting is boiling its usual temperature is 77 k. A constant temperature allows for vapor storage throughout the freezer at near liquid nitrogen temperatures.

The temperature of liquid nitrogen is 190 c but the vapor keeps the tank colder than 170 c which is still good enough to keep all of the proteins in these cells completely inactive.