The use of a bubble level is very simple. Simply place it on the plane to be measured and observe the position of the bubble to determine its levelness. This intuitive operation method allows users to get started without complex training. Bubble level is suitable for different occasions and industries, such as construction, home decoration, mechanical manufacturing, etc. In various scenarios where horizontal measurement is required, bubble level can play an important role.

The working principle of the bubble level is based on the surface tension and gravity of the liquid. When the bubble level is placed on the surface to be measured, the liquid will be evenly distributed between two disks, and the bubbles will move to the highest point of the liquid, which is the horizontal position. If the surface is not horizontal, the bubble will deviate from the central position due to gravity, and the surface's levelness can be determined by observing the position of the bubble.