Category for specialized analytical equipment used for material composition analysis, product quality assessment, and environmental measurement in manufacturing sites. Includes metal composition analyzers, material testing machines, surface roughness measuring instruments, hardness testers, film thickness gauges, elemental analysis equipment, spectrophotometers, chromatography systems, X-ray analysis equipment, and thermal analysis instruments. Used in quality control and R&D departments to quantitatively measure and evaluate chemical composition and physical properties of products, enabling manufacturing process optimization and quality assurance. Unlike simple measuring instruments, these are advanced analytical devices capable of performing detailed component analysis from sample preprocessing.