The ERUN-SP-M9000 series of surface water conventional five-parameter portable water quality rapid tester developed and produced by Erun Group is suitable for on-site rapid analysis of surface water environmental quality. The portable conventional five-parameter testing instrument for surface water refer to "GB 3838" standards, it can quickly detect five conventional water quality parameters: temperature, pH, dissolved oxygen, turbidity and conductivity of surface water such as rivers and lakes. The multi-parameter rapid water quality tester for rivers and lakes can be used for rapid testing of outdoor on-site surface water quality. It can help users quickly understand and grasp water quality conditions, and is of great significance for early warning of major or mobile water pollution incidents.

The ERUN-SP series rapid testing instrument for basic water quality items in five types of surface water developed and produced by Erun Group is suitable for quick testing of on-site water quality of rivers, lakes, canals, channels, reservoirs and other surface waters. The multi parameter rapid testing instrument for Class I to V surface water can test the concentration values of basic water quality parameters in GB3838 surface water environmental quality standard, including water temperature, pH value, dissolved oxygen, COD, BOD, ammonia nitrogen, total phosphorus, total nitrogen, heavy metals, inorganic salts, petroleum, fecal coliform bacteria, etc. The portable five types of water quality basic item analyzer can be used for centralized surface water sources, habitats of rare aquatic organisms, spawning grounds/wintering grounds for fish and shrimp, aquaculture areas and other fishery water bodies, as well as swimming areas, agricultural water areas and general landscape requirements water bodies, to determine whether it is a Class I, II water body, or Class III, IV, and V water body.