In water quality monitoring, ammonia nitrogen is an important indicator of water quality. To ensure positive results of water quality monitoring, people need to accurately measure ammonia nitrogen content. The ammonia nitrogen monitor developed by the company adopts the electrode method for measurement. Before the measurement, it is pre-treated, and the compensation methods such as PH compensation, temperature compensation and potassium ion compensation are adopted to make the ammonia nitrogen measurement more accurate. It has the characteristics of fast and accurate measurement, and Data can be transmitted to computers, mobile phones, cloud platforms, etc. via RS485 interface. Widely used in rivers, oceans, lakes, breeding and other fields.