We know that the rehydration time of the liquid nitrogen tank can be divided into two situations, one is to store only liquid nitrogen, and replenish when the liquid nitrogen is 1/3 of the total capacity; the other is to store samples, such as cells, depending on whether the liquid nitrogen can Cover the highest point of the sample.
All in all, it depends on the liquid level!
Moreover, compared with liquid nitrogen storage, liquid nitrogen tanks for cell storage need to pay more attention to the liquid level height, because this value may affect the safety and activity of cells! So how to determine the liquid level of the liquid nitrogen tank for cell storage?
There are two ways: one is to determine manually, and the other is to install an intelligent liquid nitrogen level detector, also called a liquid level alarm.
Determine manually, ie with the aid of a dipstick or with a small solid wooden stick.
The specific operation is to insert a solid small wooden stick into the cell storage liquid nitrogen tank until it reaches the bottom of the tank, stop for a few seconds, take out a ruler or wooden stick, and wipe off the nitrogen on the surface. The remaining frosting height is the liquid nitrogen tank Liquid level height.
Add an intelligent liquid level alarm to the liquid nitrogen tank for cell storage. Using the temperature probe of the liquid level gauge combined with intelligent calculation, a text message + sound and light alarm will be sent when the liquid level is low. This method is relatively worry-free and liberating Experimental personnel, but the corresponding investment will be more.
You already know the common ways to determine the liquid level height of the liquid nitrogen tank for cell storage, how to choose according to your own needs!