Desun Uniwill DSN260 Nitrate Sensor, 0-1000mg/l, RS485 Output, IP68 Waterproof, 5m Cable

The DSN260 uses a standard RS485 interface with the Modbus RTU protocol. Connect the sensor's RS485 wires (A/B or +/-) to your PLC's RS485 port, set the correct baud rate (typically 9600 or 19200 bps) and slave address via configuration, and you can read nitrate concentration values directly using Modbus function codes. It supports daisy-chaining with other Modbus devices.

The sensor operates on a 6 to 12 V DC power supply, with a typical current draw of less than 50 mA. The connection cable typically includes separate wires for power (V+, GND) and the RS485 communication lines (A, B). Always ensure the power supply is stable and properly fused to protect the sensor's internal electronics.

The sensor is rated IP68 and can be continuously submerged at depths up to 10 meters. For maintenance, periodic cleaning of the ISE membrane is recommended to remove biofouling or deposits. Calibration should be performed as per your application's required accuracy, typically using standard nitrate solutions. The robust POM housing resists most chemicals found in water treatment.

The DSN260 is designed for a wide pH range of 4 to 10 and an operating temperature range of 0 to 50°C. This makes it suitable for most natural waters, aquaculture systems, and industrial wastewater. Performance outside these ranges may affect accuracy and sensor longevity.