Shandong Dongyi Photoelectric Instrument Co., Ltd. As a national high-tech enterprise, we specialize in R&D and production of spectrometers and core components. Since 2000, we have developed four major product lines: Optical Emission Spectrometers (DF series) X-ray Fluorescence Spectrometers Material Analyzers (for grain, soil, sulfur) ICP-OES & LIBS Spectrometers With 30+ patents and an annual capacity of 1,000+ units, our instruments serve key industries including metallurgy, mining, environmental protection and scientific research.