UGS color quartz tube level meter (hereinafter referred to as color level meter) is developed with domestic and foreign technology. It is the use of natural light in the liquid folding, reflection principle, with the aid of red and green pieces, in the measurement, so that the liquid phase is green, gas phase is red. Because of the contrast of liquid-gas phase display, clear indication, so it is more favorable for long-distance operation and night patrol. If you have an LED light source, the display will be clearer. Therefore, it is widely used in petroleum, chemical, electric power, metallurgy and other industries of all kinds of transparent liquid containers and boilers, such as water, gasoline, liquefied gas, liquid ammonia, propane, propylene, aromatics, acids and other oil and chemical raw materials liquid level measurement. At the same time for two different medium density interface measurement, can choose the quartz tube level meter. The three-color interface quartz tube liquid level meter is designed using the principle of buoyancy and specific gravity difference. The small float in the quartz tube is suspended in the dividing part of the two media. Because the float is black, the upper and lower part of the liquid color is different, so the display is eye-catching.