Classification of scientific analytical instruments used in quality control, research and development, and product inspection in manufacturing industries. Includes spectrophotometers, chromatography equipment, mass spectrometers, elemental analyzers, and physical property measurement instruments. These instruments are used for component analysis of raw materials, product quality inspection, defect cause investigation, and characteristic evaluation during new product development, serving as critical equipment that supports quality assurance and technological innovation in manufacturing processes. Unlike general measuring tools and inspection devices, these are precision instruments requiring advanced analytical techniques and specialized knowledge.