Discover the RBEF-P series for non-full pipe flow. Learn how our multi-electrode technology outperforms Doppler sensors in gravity drainage and industrial effluent.

FAQ – Partially Filled Pipe Electromagnetic Flow Meter

Q1: What makes RBEF-P different from standard electromagnetic flow meters?  

Standard magmeters require a full pipe to measure accurately. RBEF-P is designed for partially filled pipes (gravity flow, open channel). It measures both velocity and liquid level, then calculates flow using the velocity‑area method.

Q2: What accuracy can I expect?  

±2.5% of full scale (FS) when liquid level is between 10% and 100% of pipe diameter.

Q3: Why does the meter have three electrodes?  

Electrodes are placed at 10%, 30%, and 50% of pipe height. The meter automatically selects the best electrode above the liquid surface, avoiding interference from surface grease, oil, or floating debris.

Q4: Does debris or sediment affect measurement?  

No. Electromagnetic flow meters have no obstructions. The sensor is not affected by suspended solids, bubbles, or floating objects.

Q5: Is pipe modification required for installation?  

No. RBEF-P uses standard flange connections (GB, DIN, ANSI). Just install it between existing pipe flanges – no weir or flume construction needed.

Q6: What outputs are available?  

4‑20mA analog, pulse, and RS485 with Modbus RTU protocol.

Q7: What pipe sizes are supported?  

DN100 to DN1200 (larger sizes available on request).

Q8: Can the sensor be submerged?  

Standard sensor IP65, optional IP68 for submersible installation. The converter is IP54 (wall or column mount).

Q9: Where is RBEF-P commonly used?  

Municipal sewage, stormwater drainage, industrial wastewater, irrigation canals, wastewater treatment plant influent/effluent, and combined sewer overflows.

Q10: How does RBEF-P compare to flumes or weirs?  

Lower total cost (no civil works), minimal maintenance, no pressure loss, and easy retrofit into existing pipelines.

Need a quote or technical advice? Send your project details – we reply promptly.

*Keywords: partially filled pipe flow meter, open channel flow meter, wastewater electromagnetic flow meter, RBEF-P, velocity area method