1500mm Manual Liquid Level Ruler for liquid nitrogen

Danclan manual liquid level ruler for measuring liquid nitrogen. This 1500mm liquid level meter can provide an efficient measurement for a liquid nitrogen tank or cryogenic freezer. Place the ruler to the bottom of the container, then hold for a while untill you can see a frost line. There are two models for liquid level ruler, 1500mm and 1000mm, and the logo on the ruler can be customized by demand.