This is our patented product which takes us 3 years to research and design. It contains data acquisition, FH communication and automatic control. With the super low consumption technology, the battery only need to be replaced every six months to one year and no need for other power. All the failures and parameters could be alarmed by sound and light; all the operating parameters of large quantity biological liquid nitrogen containers could be monitored through wireless communication. The working status of all the containers could be checked in the monitoring center. The important alarm massage could be sent to the man who is responsible for this on his mobile phone. This product helps the management of the biological liquid nitrogen container and also could monitor the liquid level of every single biological liquid nitrogen container.