Although, there are ways to use 1. Before use
Check the sealing of the liquid nitrogen tank to see if there is air leakage. If there is any abnormality, contact after-sales service in time;
New jars should be filled slowly and pre-cooled to prevent the liner from cooling too quickly and reducing its service life;
Check frequently. If frost is found on the surface of the tank, stop using it;
When not in use for a long time, it should be cleaned and stored to prevent sample residue from corroding the tank wall and affecting the service life;
