YEX-HY-DFM-02 Doppler Flow Meter

Compact Doppler flow measurement for channels and partially filled water systems.

YexSensor YEX-HY-DFM-02 uses ultrasonic Doppler measurement to collect flow velocity, water level and related flow data in open-channel environments. The integrated structure and RS485 Modbus RTU communication make it practical for field monitoring and water project automation.

Core Technical Advantages

• Ultrasonic Doppler principle supports velocity measurement in water containing suspended particles or bubbles.

• Integrated water level and temperature sensing simplifies installation for flow monitoring systems.

• IP68 housing supports submerged channel installation and long-term field use.

• Low operating current and RS485 Modbus RTU communication fit remote data acquisition projects.

Application Scenarios

• Open-channel water flow monitoring

• Irrigation channel flow control

• Drainage and stormwater monitoring

• Sewage treatment process flow observation

• Small river or culvert flow projects

Technical Performance Parameters

Installation and Wiring Guide

Install the sensor in a stable flow section and keep the probe fully submerged with sufficient clearance from channel walls, bottom sediment and debris. The sensing direction should face upstream according to the manual.

Wiring note: Typical wiring includes DC power positive, DC power negative, RS485 A and RS485 B. Keep the vent hose unobstructed and protect all joints from water ingress.

Maintenance and Commissioning Guide

Remove attachments, sediment and debris around the sensing area as part of routine maintenance. Recheck channel parameters and Modbus settings after relocation.

Frequently Asked Questions

Q1: What medium is suitable for Doppler measurement?

A1: Doppler measurement works best when water contains suspended particles or small bubbles that can reflect ultrasonic signals.

Q2: Can it measure water level as well as velocity?

A2: Yes. The sensor supports velocity and water level data for flow calculation.

Q3: Is it suitable for submerged use?

A3: Yes. The product is designed with IP68 protection for submerged channel installation.

Q4: What communication protocol is used?

A4: It uses RS485 Modbus RTU for integration with data loggers, RTUs and PLCs.

Q5: What installation area should be avoided?

A5: Avoid turbulent zones, heavy sediment, backwater areas and locations with frequent debris impact.

Q6: Why does velocity fluctuate?

A6: Check flow stability, sensor direction, bubbles, debris and whether the probe is fully submerged.

Q7: Can it be used for irrigation channels?

A7: Yes. It is suitable for irrigation channels, drainage channels and small open-channel projects.

Q8: How often should it be cleaned?

A8: Cleaning frequency depends on water quality; inspect more often in sewage or sediment-heavy channels.

Summary

YEX-HY-DFM-02 gives integrators an economical Doppler flow monitoring option with submerged installation, IP68 protection and Modbus data output.