Spectrophotometer that measures light absorption in the ultraviolet to visible light region (190-1100nm) for quantitative analysis of substance concentration and purity in solutions. Used in manufacturing for raw material quality control, product component analysis, and process control concentration measurement. Available in single-beam, double-beam, and array types, suitable for analysis of pharmaceuticals, chemicals, food, and metal materials. Primary application is quantitative analysis through absorbance measurement, differing from infrared and fluorescence spectrophotometers in measurement wavelength range and principles. Includes consumables such as cuvettes, light source lamps, and detectors.