TN-300 Total Nitrogen Analyzer

It is specifically designed for the continuous automatic determination of total nitrogen concentration in water bodies. The instrument employs the colorimetric acid spectrophotometry method. During the detection process, different forms of nitrogen compounds such as organic nitrogen, ammonia nitrogen, and nitrite nitrogen in the water sample are decomposed and oxidized to nitrate nitrogen. Then, through a chemical reaction, they form colored compounds with characteristic absorption peaks. The absorbance changes of these compounds are detected by spectrophotometry, and the total nitrogen concentration value is calculated based on the standard curve. This method has high sensitivity and good repeatability, and can effectively meet the accuracy and stability requirements for in-situ online monitoring.

The instrument’s measurement range is from 0 to 5 mg/L, with a resolution of up to 0.001 mg/L and a measurement accuracy of 0.05 mg/L or ±10%. It is suitable for various water environment scenarios such as surface water, rivers, lakes, reservoirs, coastal waters, and estuaries. Through real-time monitoring of total nitrogen indicators, it can promptly grasp the trend of water body nutrient salt changes, providing reliable data basis for assessing eutrophication, warning of algal blooms, investigation of pollution sources, and ecological environment management.

The TN-300 is powered by 24VDC and supports the RS485 Modbus RTU communication protocol. It can be easily integrated into buoy platforms, multi-parameter water quality monitoring systems, shore-based monitoring stations, and smart environmental protection platforms, enabling remote transmission, automatic control, and centralized management. The device has an IP68 protection rating and can operate stably for a long time in an environment ranging from 0 to 50℃, making it suitable for complex field conditions and unmanned continuous deployment.

Meanwhile, the instrument is compact in structure, easy to install and maintain, and has low operating power consumption. It can adopt various deployment methods such as floating integration, shore-based fixation, and onboard patrol measurement according to actual needs, providing users with continuous, stable and high-quality total nitrogen monitoring data. It is an important equipment for carrying out water environment precision management and intelligent monitoring.