Electromagnetic Open Channel Flowmeter
Purpose-Built for Accurate open-channel, irrigation, and wastewater discharge Flow Measurement
Approved by：CE, SIL-3, ATEX Explosion-proof certification
Our Electromagnetic Open Channel Flowmeter is an engineered system designed to measure flow in partially filled pipes, culverts, and open channels. By utilizing the proven flow velocity area method, the system integrates a flow velocity meter, a liquid level sensor, and a powerful flow display to provide a comprehensive measurement solution.
It is the ideal instrument for monitoring rectangular and trapezoidal channels found in reservoirs, rivers, water conservancy projects, urban water supply, sewage treatment, and farmland irrigation. Delivering accurate, stable, and maintenance-free flow monitoring for irrigation canals, wastewater discharge, and environmental flow control — even in unpressurized or partially filled channels.
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Stable and Reliable Measurement: Utilizes low-frequency square wave excitation (1/16 power frequency) to ensure a stable zero point and high immunity to electrical interference.
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High-Resolution Velocity Sensing: Features a wide velocity measurement range of 0.01 to 20 m/s with a fine resolution of 1 mm/s, capturing both low and high-flow events with precision.
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Flexible Power Options: Supports multiple power sources, including a wide AC range (90-260VAC) and DC (12-30VDC), ensuring compatibility with various site requirements.
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Seamless System Integration: Includes a standard MODBUS (RTU) network function via an RS-485 interface, allowing for easy integration with SCADA, PLC, and other centralized control systems.
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Advanced Data Management: Can be customized to record positive and negative flow totals separately and features permanent memory of historical data, ensuring no data is lost during power interruptions.
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Robust, All-Weather Protection: The electromagnetic flowmeter sensor is rated to IP68, while the level gauge and flow indicator are rated to IP65, guaranteeing performance in harsh and demanding environments.
| Feature | Specification / Benefit |
|---|---|
| Accuracy | ±2.5% of reading |
| Flow Range: | Configurable to channel geometry (DN65–DN1400; pressure 1.0–2.5 MPa equivalent sensor) |
| Channel Width: | 40cm – 2000cm (water level must be >20cm) |
| Display: | Backlit LCD displaying instantaneous and cumulative flow |
| Power Supply: | AC 220V, AC 110V; DC 24 V (optional) |
| Protection Class | Sensor: IP68 / Converter: IP65 |
| Alarm Functions: | Flow upper/lower limit, water level upper/lower limit, excitation alarm, sensor exposure |
| Sensor Connection: | Split type; square housing connects to sensor via communication cable |
| Relative humidity: | 5% ~ 90% |
| Ambient Temperature | -10 °C to ~ 60 °C |
| Communication | Modbus RTU / HART / Wireless telemetry (optional) |
| Option | Description |
|---|---|
| Wireless Communication | GSM/GPRS for remote data transfer |
| Data Logging | Internal storage for flow, level, and alarms |
| Solar Power System | For remote or unpowered sites |
| Material Customization | 316L SS, Hastelloy, Titanium, etc. |
| Integration | With SCADA or cloud-based monitoring system |
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Installation: It is a split-type system. The robust IP68-rated flow and level sensors are installed directly in the channel, while the IP65-rated host display unit can be mounted in a convenient, accessible location. The units are connected via a shielded communication cable. Refer to the instruction manual for detailed guidelines on sensor placement and mounting.
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Maintenance: Thanks to its non-contact measurement principle and durable construction, the open channel flowmeter requires minimal maintenance. Periodic inspection for debris or damage to the sensors is recommended to ensure continued accuracy.
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Water Conservancy & Resources: Reservoirs, rivers, and natural streams.
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Municipal Water Systems: Urban water supply channels and sewage treatment plants (influent and effluent).
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Agricultural Irrigation: Farmland irrigation canals and water distribution networks.
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Environmental Monitoring: Measuring discharge in various open-channel environments.
