The Mini Vapor LN2 Tanks is unique in the market .it realises real-time temperature monitoring, liquid level monitoring, automatic liquid replenishment,remote monitoring and alarm as well as automatic backup storage of monitoring date. Based on the capacitive level sensor, it can easily and automatically control the liquid level to achieve the vapor phase storage at -190℃ at the top of the tank, which completely solves the technical problem of applying electronic information technology in low temperature environment of -196℃. It is a perfect combination of advanced liquid nitrogen tank manufacturing technology and intelligent monitoring technology, with light weight, small footprint, large capacity, efficient sample access, real-time monitoring of the liquid nitrogen tank's operating status and timely alarming in case of problems to ensure the safety of sample storage, mainly for users such as biomedical and sample banks.