With the development of social industrialization, water quality deterioration and water pollution problems are becoming increasingly serious. In this situation, the government has established online water quality analyzer monitoring stations to strengthen the supervision of various water environments. At the same time, enterprises are required to install online monitoring instruments at the end of water treatment (discharge outlet) and establish an automatic water quality monitoring network system, further promoting the technological development of online water quality analyzers and the market expansion capabilities of production enterprises.
　　
　　Online water quality analysisInstrument is a water quality monitoring tool that can automatically monitor various parameters of water quality in real-time. Capable of meeting the needs of various industries such as water supply, medicine, pharmaceuticals, sewage treatment, municipal services, electricity and energy, food processing, plastics, automobiles, semiconductors, tires, metallurgy, material processing, mining, printing, and oil and gas.
　　
In order to ensure the quality of water supply in Mount Huangshan Scenic Spot and reach the modern management level, the Water Supply Company of Mount Huangshan Scenic Spot has established an automatic dispatching system for tap water supply in Mount Huangshan Scenic Spot, and has realized an automatic real-time monitoring system integrating video safety monitoring, remote monitoring and control of process equipment, and water supply dispatching, with the whole mountain optical fiber ring network as the communication network platform. In order to further expand and improve the entire water supply guarantee system and improve the water quality of the Yungu Temple water supply area, a Yungu Temple water supply substation was established under the Yungu Temple reservoir. Two mechanical filtration devices were used to filter and purify the water quality, and chlorine dioxide generators were used for chlorine disinfection. After passing the HACH water quality analysis instrument inspection, the water was supplied to the Yungu Temple area. The monitoring of water quality is a basic requirement for water supply safety. In accordance with the principle of economic practicality, intelligent instruments with high accuracy, good stability, high cost-effectiveness, and simple maintenance should be used.
　　
As the water supply system of Mount Huangshan Scenic Spot is the source of reservoir water with low turbidity, and chlorine dioxide generator is used to add chlorine, through comparison, the water quality monitoring instrument of Yungu Reservoir adopts digital instrument of American HACH Company, 1720E low turbidity analyzer andChlorine dioxide monitoring instrumentUse an SC100 controller with a 1720E turbidity meter and a PHDsc probe to detect the turbidity and pH value of the source water; A SC100 controller, equipped with a 1720E turbidity meter and a 9187 chlorine dioxide analyzer, is used for the detection of turbidity and residual chlorine in the factory water. A sampling pump is used for water supply. The system collects real-time water quality and water supply flow data through PLC, automatically controls the amount of chlorine dioxide added, and monitors the turbidity of source water and factory water. When the turbidity of source water reaches a certain range, the metering pump is turned on to add flocculant to ensure that the turbidity of factory water meets the water supply standards.