Consists of (indicator) chamber (pipe body non-magnetic), and indicator float, magnet has a built-in (part pointed by the indicator) and the rotor float, and liquid level gauge magnet float type, the liquid in the chamber from the nozzle float float is turned on, the float moves up and down along with the rise and fall of the liquid. At that time, we will display rotating the rotor and the rotor magnet float while suction and repulsion. In addition, because of its good seal without the use of a pressure-resistant glass in the fluid at high risk, such as high-pressure and high-temperature fluid alkali, strong acid, flammable or toxic, odor, dirt, etc. on the fluid viscosity is relatively large, be suitable. In white (or light liquid) red every 10mm, every green vapor 100mm, instruction color indicator, liquid level appears generally clear liquid phase (liquid or heavy).