The ERUN series industrial recirculating cooling water water quality testing instrument for laboratory developed and produced by Erun Group is a solution designed in accordance with the "GB/T 50050-2017 Code for design of industrial recirculating cooling water treatment". The main detectable parameters of the water quality testing instrument of recirculating water laboratory include pH value (25 °), conductivity, turbidity, suspended solids, total hardness, total alkalinity, chloride ions, total iron, total heterotrophic bacteria, copper ions, oil content, free chlorine, NH3-N, COD, etc. The industrial cooling water analyzer is suitable for testing the water quality of industrial recirculating cooling water in fields such as steelmaking, synthetic ammonia, thermal power plants, casting, steel rolling, blast furnaces, converters, and petroleum smelting using indirect open cooling systems, indirect closed cooling systems, and direct cooling systems.

The ERUN series water quality analysis and testing instrument of recirculating cooling water system in chemical palnt developed and produced by Erun Group is a solution designed in accordance with the GB50648. The chemical process cooling water quality testing instrument is suitable for testing the water quality of chemical industry recirculating cooling water using indirect open cooling systems, indirect closed cooling systems, direct open cooling systems in petrochemical, agricultural chemical, chemical pharmaceutical, polymer, coating, oil and fat, plastic, synthetic fiber, rubber, pharmaceuticals and other chemical industries. The main parameters that can be tested by chemical industry recirculating water quality analyzer include pH, conductivity, turbidity, suspended solids, total hardness, total alkalinity, chloride ions, iron, copper, ammonia nitrogen, COD, heterotrophic bacteria, oil, total phosphorus, residual chlorine, etc.