UGS color quartz tube level gauge (hereinafter referred to as color level gauge) is developed by color technology at home and abroad. It uses the principle of refraction and reflection of natural light in the liquid, with the help of red and green sheets, during measurement, the liquid phase is displayed in green, and the gas phase is displayed in red. Due to the large contrast of liquid phase display, the indication is clear and clear, so it is more beneficial for long-distance operation and night patrol. If there is an LED light source, the display will be clearer. Therefore, it is widely used in various transparent liquid containers and boilers in petroleum, chemical, electric power, metallurgy and other industries, such as the liquid level of water, gasoline, liquefied gas, liquid ammonia, propane, propylene, aromatic hydrocarbons, acids and other oil products and chemical raw materials. Measurement. At the same time, for the interface measurement of two different medium densities, a three-color interface quartz tube liquid level gauge can be selected. The three-color interface quartz tube liquid level gauge is designed based on the principle of buoyancy and specific gravity difference. The small float in the quartz tube is suspended in the boundary of the two media. Since the float is black, the upper and lower parts of the liquid have different colors, so the display is eye-catching. .