We know that liquid nitrogen tanks have a service life!

Regardless of whether it is a liquid nitrogen cell storage tank or a liquid nitrogen sperm storage tank, if it has been kept statically without opening the lid, and after taking samples regularly or moving the container for use, it will be found that the loss will be more after use and the liquid nitrogen will evaporate more.

why is that?

What is the reason for the loss of liquid nitrogen cell storage tank after use?

The reasons are divided into two categories: one is to remove the neck plug, open the tank mouth, the heat contacts the surface liquid nitrogen, and increases evaporation;

The other type is the load-bearing problem of the inner tank, which has a small amount of pull on the neck tube, which wears out every day, and the seal of the neck tube decreases over time.

Let’s talk about evaporation loss first. The boiling point of liquid nitrogen is -196.56°C. A little heat will evaporate instantly when exposed to heat, and the gas will easily accumulate into pressure and cause danger. Therefore, the liquid nitrogen cell storage tank is not completely sealed, and there is a certain amount of static evaporation every day. Opening the lid will intensify this evaporation, and the longer the lid is opened, the more evaporation will occur; the cryopreservation rack proposes that this process will bring in heat to accelerate evaporation .

This is the problem of liquid nitrogen loss after the liquid nitrogen cell storage tank is used.

Then there is the evaporation caused by the load-bearing of the inner tank. There is a vacuum + heat insulation material between the inner tank and the outer tank of the liquid nitrogen cell storage tank. There is a neck tube on the upper part as the connection between the inner tank and the outer tank, which means that the bottom of the inner tank is except for the heat insulation material Nothing else. The larger the number of cell cryopreservation racks, the more load-bearing, plus the weight of liquid nitrogen, shaking when moving, etc., which will cause wear and tear on the neck tube almost every day.

If the neck tube is damaged, the vacuum will be affected! Therefore, with the use of time, or the lack of care for the container, the vacuum of the liquid nitrogen cell tank will decrease, and the insulation is not as good as that of the new tank.

The above is the reason for the loss of the two liquid nitrogen cell tanks after use!