Today we are learning how often the liquid nitrogen tank is filled with liquid nitrogen. According to the use conditions, the size, and the frequency of taking samples are different. Generally speaking, when the remain liquid nitrogen is only one-third of the total capacity, it should be replenished immediately. This can help the liquid nitrogen tank to prolong the use time and protect the liquid nitrogen tank from accelerating waste. I hope that today's learning knowledge can be of some help to everyone.