The LED control screen is connected to the data acquisition and transmission instrument, collecting data from the environmental protection data acquisition instrument in various forms, and displaying real-time information such as COD and ammonia nitrogen on the LED display screen. 1. Supports the data transmission standard for online automatic monitoring (surveillance) systems of pollution sources, namely the HJ/T212-2005 protocol. 2. Compatible with various upper computer software for environmental protection data acquisition instruments. 3. Displays multiple data points online, including COD, ammonia nitrogen, oxygen levels, and other related pollution indicators. 4. Supports multiple communication methods such as network, 485, and 232. 5. Can utilize wired, wireless, 3G, 4G, and other communication methods. 6. Supports the environmental protection 212 national standard protocol. 7. Compatible with the Modbus communication protocol. Contact: Chen Wei Tel: 0531-82026192 Contact Numbers: 13306401012, 13287777118 QQ: 350405767, 2233861118 MSN: 13306401012@126.com