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Mqtt Water Quality Sensor Cod BOD Toc Turbidity Temperature Analyzer for Wastewater. Self-cleaning, compact online sensor for continuous COD, turbidity, and temperature monitoring, with automatic turbidity compensation and zero chemical pollution. High-performance digital sensor with low maintenance, long-term stability, and low power consumption, featuring RS-485 Modbus/RTU communication. It can be RS485 output and we can also supply the all kinds wireless module GPRS, 4G, WIFI , LORA , LORAWAN and also the matched server and software to see the real time data in the PC end.