Liquid Nitrogen Freezer Temperature

Because liquid nitrogen in a usual setting is boiling its usual temperature is 77 k.

Liquid nitrogen freezer temperature.

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. Mve stock provides the ultimate in security for the breeding industry and are primarily used to store semen and embryos. Liquid helium is also commonly used and allows for the lowest attainable temperatures to be reached. At normal atmospheric pressure nitrogen is a liquid between 63 k and 77 2 k 346 f and 320 44 f.

Below 63 k it freezes into solid nitrogen. Liquid nitrogen ln 2 is nitrogen in a liquid state at low temperature 195 79 c 77 k. However if the liquid nitrogen contacts the cellular formation the content will be damaged and become unusable. 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.

Over this temperature range liquid nitrogen looks much like boiling water. Liquid nitrogen is very cold. 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. Liquid nitrogen freezers use liquefied carbon dioxide at 196 to freeze food or ingredients.

In its basic form a liquid nitrogen freezer is. Each freezer isn t completely filled with liquid nitrogen for a few reasons. These liquids may be stored in dewar flasks which are double walled containers with. 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.

The cellular structure isn t completely destroyed preventing complete lost of moisture.