1000mm Manual Liquid Level Ruler for measuring

Danclan manual liquid level ruler for measuring liquid nitrogen. This 1000mm liquid level meter can provide an easy and efficient measurement for a LN2 tank or cryogenic container. Place the ruler to the bottom of the container, and then hold for a while untill you can see a frost line. There are 2 models for the ruler, 1500mm and 1000mm, and the logo on the ruler can be customized by demand.