The project is of great significance as it concerns the water safety of the entire residents and crops on Chongming Island. Previously, without automatic monitoring of whether seawater was backflowing, seawater often entered Chongming Island, affecting the growth of crops and resulting in low crop yields. It has increased the cost of water quality treatment in the early stage of waterworks.

This project is a collaboration from Taiwan. The biggest challenge of this project lies in the large number and long distance of monitoring points. There are a total of 45 monitoring points, and each point needs to measure three parameters (pH, dissolved oxygen and temperature). Transmitting the data to the central control room using the traditional 4-20mA would waste a lot of signal lines and be unstable.In this case, I proposed to change the original 4-20mA output of the instrument to RS485. In this way, the 45 monitoring points can be connected in series and finally transmitted to the central control room through one data bus. This not only reduces the number of signal lines but also brings convenience to the on-site installation and commissioning.

This project is public bidding of the government, as a project leader for the first time to participate in such a large government bidding or has the certain difficulty, need to start from the prepared data, do the tender, including instrument selection, I chose the company pH6 + acidity meter, portable water quality analyzer its advantage is that English friendly interface, simple operation; It has gained the trust of the environmental protection government, providing a basis and guarantee for local environmental protection bureaus to better monitor water quality, making a significant contribution to the safety of drinking water in Anhui Province, receiving unanimous praise from the industry, and enhancing the company's reputation.