Shandong Keli Opto-electronic Technology Co.,Ltd. belongs to Laser Research Institute of Shandong Academy of Sciences. We dedicated to research, promotion and application of photoelectronic protecting technology. SDKELI is a professional manufacturer of photoelectronic safety protection products, and the leader of photoelectronic safety technology in China. It is the leader unit of Electro-sensitive Equipment of National Technical Committee on Electrical Systems of Industrial Machinery of Standardization Administration. And SDKELI is the standard drafting team of GB4584-2007, GB/T19436.1, and GB/T19436.2. It is Shandong Technology Research Center for Photoelectronic Detection Security Control Project.