Liquid nitrogen liquid level monitoring system

The invention discloses a liquid nitrogen liquid level monitoring system which comprises a liquid nitrogen container. The side wall of the liquid nitrogen container is provided with a temperature shield which is connected to a temperature sensing monitor which is visually packaged in the side wall of the liquid nitrogen container through an outer glass protection cover. The temperature sensing monitor is used for detecting the temperature of the liquid nitrogen container and displays different colors according to different temperatures. When the liquid level of the liquid nitrogen container is lower than a preset value, the temperature of the liquid nitrogen container rises, and the temperature sensing monitor displays a first color. When the liquid level of the liquid nitrogen container is higher than the preset value, the temperature of the liquid nitrogen container decreases, and the temperature sensing monitor displays a second color. According to the system, the visual management and automatic replenishment function of the liquid level of the liquid nitrogen container can be realized, the burning events of a human operation are reduced, and the operational efficiency is improved.