Intuitive level gauge is in place indicating instrument, which is installed in a variety of containers, direct observation of the internal liquid level. Part of a green liquid, non-liquid part of the red. With the change in liquid level automatically changes down the red, green, two colors, it has overcome the ordinary glass (or tube) is filled with liquid level gauge or no liquid can not determine when the liquid level of the shortcomings. The level gauge two-color display, but also facilitate remote observation and night patrol, it is glass (or tube) level gauge replacement products.