Magnetic level indicator could be used to observe the liquid level directly of the medium in various containers. And remote transmission and switching alarm function could be added, it is connected to remote display through 4-20mA output. It is suitable for liquid level indication of the petroleum, chemical and other industries. The liquid level indicator has simple design structure, intuitive and clear observation, no blocking nor leakage, easy installation and simple maintenance.

There is a cavity to accommodate the floater of magnetic level switch, we call it as main body or housing. It is connected by flange or other method with container to form a communicating vessels. Because we added a magnetic steel in the floater at the junction interface which it sinks into the liquid and emersion part. When it floats with the floater and push the rotating columns to turns 180°。Because the magnetic rotating column is a cylinder composed of two semi-cylinders with read and white, so it will change the color when rotate 180°, the junction surface of two colors is just the height of liquid level inside.