This system integrates water quality monitoring sensors (probes) placed within the target water body,forming a real-time , unattended online monitoring solution for field applications . It combines sensor -based online monitoring technology , solar self-powering technology, modern wireless communication , data acquisition , and cloud platform monitoring, along with extensive field operation and maintenance experience , to deliver a comprehensive monitoring system and modern water body surveillance methodology. The monitoring system enables round-the-clock, continuous, fixed-point observation of water quality conditions, transmitting data in real time to a central station . It performs in-situ water quality measurements , allowing for real-time, rapid monitoring of waterquality status and trend changes . The system comprises a pole structure, data acquisition and transmission unit, analysis unit, power supply unit, auxiliary unit, and other components . System Characteristic The analytical monitoring sensors employed in this system utilize proven technologies, featuring simple structures, low maintenance requirements, high monitoring accuracy, and excellent stability. This monitoring system can operate continuously under long-term unattended conditions Key Features: ● Directly place the in-situ electrode in water; data is collected and uploaded immediately; ● Solar self-powered technology, suitable for locations with limited power access; ● Capable of integrating multiple monitoring parameters; ● Enables long-term, continuous, fully automated, unattended online monitoring; ● Strong anti-interference capability and excellent field adaptability; ● Low power consumption and low operational maintenance costs; ● Sensor-based monitoring provides real-time tracking of water quality and changes, with instant ● alert functionality; ● Reagent-free operation with zero secondary pollution, meeting environmental requirements; ● Electrical Interface: RS485 port with standard MODBUS communication protocol; ● Supports bidirectional communication with monitoring platforms, enabling both wireless and ● wired data transmission; ● Utilizes Bluetooth for routine debugging and maintenance, ensuring convenience and efficiency. System Description Instrument Principle: The multi-parameter online automatic water quality monitor enables rapid, continuous measurement of multiple parameters—including temperature, dissolved oxygen, pH/ORP, conductivity, and turbidity—within a single instrument. Depending on the application scope, the measurement principles and corresponding ranges vary. Instrument Features: ● Robust sensor construction ensures reliable analysis with an innovative, versatile design; ● Flexible sampling interval settings optimize active/standby time to reduce overall power ● consumption, suitable for battery-powered or solar-powered applications; ● Standard Modbus RS-485 digital signal output enables integration and networking with remote ● devices; ● Electrodes can be replaced directly on-site for simple, rapid maintenance.