The polluted (waste) water discharged from the pollution source, due to the high total amount or concentration of pollutants, does not meet the requirements of discharge standards or does not meet the requirements of environmental capacity, thereby reducing the water environmental quality and functional goals, it must be artificially enhanced. In the sewage treatment process, the indicators that need to be monitored include ammonia nitrogen, total phosphorus, total nitrogen, COD, pH, dissolved oxygen, and biochemical oxygen demand. Format Product Water Treatment Q-DO Dissolved Oxygen portable colorimeter Q-TSS Suspended Solids Portable Colorimeter T-6800 Multi-parameters portable spectrophotometer Z-T500 Intelligent Multi-parameters analyzer Z-D500 Multi-parameters analyzer Z-T700 Intelligent Multi-parameters Analyzer Z-D700 Multi-parameters Analyzer S-10 Safe Reactor S-series Safe Reactor(S-100/S-200)