The SUPEC 5100 water quality automatic analyzer consists of a spectral module, a flow path module, and a base module. It innovatively couples fully automatic wet chemical detection technology and full spectrum water quality analysis technology, which not only meets the accurate detection of water sample indicators to be tested, but also meets the establishment of a full spectrum library of water samples, providing a basis for the identification and traceability of pollutants. The analyzer is compact, portable, and mobile, suitable for ammonia nitrogen, total phosphorus, total nitrogen, permanganate index, chemical oxygen demand, etc. in surface water, groundwater, tap water, municipal sewage, and industrial wastewater. It can expand factors such as nitrate, nitrite, sulfate, cyanide, total iron, and total manganese. The product design and manufacturing comply with national and industry standards, and are suitable for daily inspections of surface water quality, emergency testing of sudden water pollution incidents, comprehensive environmental law enforcement on-site testing, laboratory testing, vehicle mobile testing, and online monitoring and early warning of fixed points.