WUHAN ZHONG GUANG PHOTOELECTRICITY CO., LTD located in "Optics Valley of China", is a high-tech enterprise specializing in the fiber optic sensing technique's research and application. The fiber optic liquid level sensor is adopted with the self-developed and unique technological photoconductive cell that it is able to trigger the signal when the change of the liquid level is less than 0.1mm. Incorporated the outstanding characteristics of safety, excellent accuracy and long-term stability, it has realized the safe detecting of the dangerous hazard circumstance for easy-burning, easy-explosive goods of petroleum chemical engineering etc industries. With the four patents, its technological level not only fills the domestic gaps but also achieves or exceeds the international advanced standards. We are creating new technologies and releasing a wide range of products which are proving valuable in many fields such as chemical industry, petrochemical industry, chemical fiber, chemical fertilizer, medicine, etc.