Project Background

Banqiao River in Hefei is a typical urban river section affected by rainfall runoff, residential activity and surrounding drainage conditions. The key requirement is to identify abnormal COD and ammonia nitrogen changes quickly, especially after rain or during periods of unstable flow.

For urban river management, a single laboratory result is not enough. Continuous online data helps determine whether a short-term spike is caused by runoff, mixed drainage, organic pollution or nitrogen-containing discharge.

How YexSensor Solves It

The monitoring point is configured with COD, ammonium nitrogen, pH and turbidity sensors. COD and ammonium nitrogen are the core indicators for pollution tracking. pH helps screen abnormal water chemistry, while turbidity supports judgment of runoff flushing and suspended solids disturbance.

The sensor group can be deployed at a fixed riverbank location and connected to a monitoring platform through RS485 Modbus RTU. This allows the operator to compare real-time data with historical trends and respond faster when abnormal values appear.

Recommended Product Configuration

Product Image	Model / Product Link	Configuration Role
	YEX-S1-COD COD Online Sensor	Monitors organic pollution changes in urban river sections
	YEX-S1-NHN Ammonium Nitrogen Sensor	Identifies domestic sewage impact, mixed drainage or nitrogen pollution
	YEX-S1-PH Industrial Online pH Sensor	Checks whether pH values become abnormal
	YEX-S1-ZS Online Turbidity Sensor	Supports assessment of rainfall runoff, drainage disturbance and sediment changes

This solution is suitable for urban river sections where COD and ammonia nitrogen trend tracking is the main management target.

Related FAQ

For sensor selection, communication and maintenance details, you can also read [Water Quality Sensor Selection FAQ](https://www.yexsensor.com/FAQ/water-quality-sensor-selection-faq.html), [RS485 Modbus Water Quality Sensor Integration FAQ](https://www.yexsensor.com/FAQ/rs485-modbus-water-quality-sensor-integration-faq.html) and [Water Quality Sensor Installation and Maintenance FAQ](https://www.yexsensor.com/FAQ/water-quality-sensor-installation-maintenance-faq.html).