What is the working principle of the bubble level?

The working principle of the bubble level is as follows: The bubble level is mainly composed of a closed glass tube, the liquid inside the tube, and a bubble. The glass tube contains a certain amount of liquid, usually alcohol or ether, etc., and there

is a small bubble left. When the level is placed on a horizontal surface, due to the effect of gravity, the liquid inside the tube is in a horizontal state. At this time, the bubble will be in the central position of the glass

tube. If the plane where the level is located is not horizontal, then the liquid will flow to the lower place and the bubble will move to the higher place. By observing the position of the bubble relative to the scale line on the glass tube, the inclination direction and angle of the measured surface can be judged. Generally speaking, the farther

the bubble deviates from the central position, the greater the inclination angle of the measured surface. The working principle of the bubble level is based on the fluidity of the liquid and the effect of gravity. Its structure is simple and it is easy to use, and it is widely used in various occasions

where the horizontality and verticality need to be measured.