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. Leading products include photoelectric safety devices (safety light curtains), safety relay modules and Laser Safety Devices for bending machine, which are mainly used in metal forming machinery, pressure machines and bending machines to protect personal safety.