Partial-filled pipe Electromagnetic Flowmeter
Approved by：CE, SIL-3, ATEX Explosion-proof certification
AFT Partial-filled pipe Electromagnetic Flowmeter is an advanced flow measurement instrument designed to accurately measure liquid flow under partially filled or open-pipe conditions. Using the flow-area method, it continuously measures and calculates flow in open or semi-filled conduits—such as sewage pipelines, stormwater drains, and large channels without overflow weirs.
This intelligent system measures and displays instantaneous flow rate, average velocity, and totalized volume in real time. It is especially suited for applications in municipal rainwater, wastewater, sewage discharge, and irrigation water networks. The flowmeter integrates an electromagnetic velocity sensor, a liquid-level sensor, and a smart converter. Working together, these components continuously measure the flow velocity and liquid level within the pipe.
Users simply input the inner diameter of a round pipe or the width of a rectangular channel. The instrument then automatically calculates the flow rate based on cross-sectional area and velocity, and displays key parameters such as instantaneous flow, average velocity, and accumulated flow on the indicator.
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Specialized for Partial-filled pipe Conditions: Specifically designed for open, non-full pipelines (round pipes, rectangular pipes, and special-shaped conduits) where fluid does not fill the pipe.
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Dual-Sensor Measurement: Combines electromagnetic flow velocity measurement with liquid level sensing for accurate area-velocity flow calculation.
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Advanced Calculation: Users simply input the inner diameter (round pipe) or width (rectangular pipe), and the instrument automatically computes the flow.
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Robust Performance in Harsh Environments: The sensor is built to function reliably for long periods in demanding conditions, including poor-quality sewage water.
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Bidirectional Measurement: capable of measuring forward and reverse flow rates.
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Wide Velocity Range: Accurately measures fluid velocities from 0.05m/s to 10m/s, regardless of downstream conditions or blockages.
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Comprehensive Data Display: Large, backlit LCD screen displays instantaneous flow, flow velocity, cumulative flow, and liquid level simultaneously.
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Remote Capabilities: Features optional GSM and GPRS wireless data transmission for remote monitoring locations.
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Extensive Alarm & Control Functions: Includes customizable settings for upper/lower flow and level alarms, empty pipe detection, and flow direction options.
- Caliber range: DN100-DN2000
- Accuracy: ±2.5%
- Pressure range: 1.6Mpa; (high pressure needs to be customized)
- Flow Velocity: 0.05 ~ 10 m/s
- Fluid Requirements: ≥5 μS/cm conductivity
- Medium Temperature: -25~80℃
- Lining Materials: Polychloroprene rubber, F46, PTFE, etc
- Electrode Materials: 316L, Hastelloy B, Hastelloy C, Titanium, Tantalum, Platinum-iridium alloy, Stainless steel tungsten carbide
- Protection rating: Sensor IP65\IP67\IP68 (optional), converter IP65
- Output type: Frequency, pulse, 4-20mA, RS485, Modbus protocol; Hart protocol, Profibus DP
- Power supply: 85~250V, 45~63Hz, 20VDC — 36VDC
The converter provides extensive configuration options to ensure accurate measurement in field conditions:
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Setup & Calibration: Users only need to enter the internal dimensions of the conduit (e.g., diameter for round pipes). The system allows for factory calibration factor adjustment and zero point correction.
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Level Correction: Features manual input adjustments for 4mA (0%) and 20mA (100%) liquid level signal calibration.
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Empty Pipe Detection: ATC (Air Traffic Control) alarm thresholds and empty tube zero point/span correction ensure the meter returns to zero when no liquid is detected.
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Alarm Configuration: Configurable outputs for High/Low Flow limits, High/Low Liquid Level limits, reverse flow, and excitation system failure (SYS) alarms.
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Signal Processing: Adjustable damping times (1s–60s for flow, 5s–250s for analog output) and spike suppression settings to smooth output fluctuations and eliminate noise.
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Data Security: Features multi-level password protection (Levels 1-5) for parameter settings and accumulated total clearing.
| Industry | Application | Benefit |
|---|---|---|
| Municipal Drainage | Rainwater and sewage discharge monitoring | Accurate flow data for billing and compliance |
| Wastewater Treatment | Open-pipe inflow/outflow monitoring | Reliable measurement in non-full pipes |
| Agricultural Irrigation | Channel water distribution | Continuous remote monitoring |
| Industrial Discharge | Process wastewater | Data for environmental reporting |
