The LEFOO LFEMF-G electromagnetic flow meter provides a Class 0.5 accuracy solution for measuring conductive liquids in water treatment, chemical processing and other industrial applications. Selectable liners and electrodes, combined with integral or remote configurations, allow the instrument to be matched to the liquid and installation conditions.
From wastewater containing solids to corrosive process liquids, reliable measurement depends on suitable materials and correct installation. This guide introduces the LFEMF-G’s capabilities and explains the key checks that help you select the right configuration for your process.
The LFEMF-G electromagnetic flow meter offers Class 0.5 accuracy and supports both forward and reverse flow measurement. This capability is useful in systems where the flow direction can change during operation.
The integral version combines the converter and sensor in one assembly. The remote version separates them through a connecting cable, allowing the display and controls to be positioned where operators can access them conveniently.
Selectable liners and electrodes allow the meter to be configured for different chemical and abrasive conditions. Matching these materials to the actual liquid helps support reliable operation over time.
Standard 4–20 mA and RS485 outputs support connection to compatible control and monitoring equipment. HART is available as an option and should be specified when ordering.
Available configurations include IP65 protection and a remote version with an IP68 sensor and IP65 converter. Select the protection level for each component according to its installation location.
| Parameter | Specification |
|---|---|
| Accuracy Class | 0.5 |
| Flow Velocity Range | 0–10 m/s |
| Minimum Fluid Conductivity | ≥30 μS/cm |
| Configuration | Integral or remote; remote cable length ≤300 m |
| Fluid Temperature | Standard: 0–60°C; high-temperature version: 0–120°C with PTFE or ceramic liner, remote configuration only |
| Nominal Pressure | 0.6, 1.0 or 4.0 MPa |
| Nominal Diameter | DN15–DN1000 |
| Signal Outputs | 4–20 mA and RS485; optional HART |
| Process Connection | Standard flange connection; custom non-standard flanges available |
Select a configuration that meets all operating requirements together. Material, temperature and pressure options should be confirmed for the ordered version.
The LFEMF-G measures conductive liquids across multiple industries. Applications require a conductivity of at least 30 μS/cm and materials suited to the operating conditions.
Water and Wastewater: Measures municipal wastewater, raw water, cooling water, sludge and brine. When selecting magnetic flow meters for wastewater, account for solids content and abrasion when specifying liners and electrodes.
Chemical and Synthetic Fiber Processing: Supports measurement of compatible acid and alkaline solutions, hydrogen peroxide and chemical slurries. Material selection depends on chemical composition, concentration and temperature.
Food and Pharmaceutical Processing: Potential applications include syrup, corn slurry, brewing wort, beverages and conductive process liquids. Product-contact applications require confirmation of hygienic connections, material suitability and cleaning requirements.
Mining, Metallurgy and Steel: Supports measurement of conductive mineral slurries, lime slurry and metallurgical wash water, with wetted materials selected for the liquid’s abrasiveness and composition.
Water Infrastructure, Paper, Sugar and Oilfield Operations: Measures compatible process water and conductive liquids, including papermaking black liquor and oilfield brine. Oilfield applications refer to suitable conductive liquids, rather than nonconductive oil products.
| Application | Configuration to Consider | Details to Confirm |
| Sludge or wastewater containing solids | Polyurethane liner with tungsten carbide or stainless steel electrodes | Liquid chemistry, solids content, particle characteristics and abrasiveness |
| Corrosive chemical liquids | PTFE or ceramic liner with a chemically compatible electrode option, such as tantalum or Hastelloy | Specific chemicals, concentrations and operating temperatures; these materials are not interchangeable |
| High-temperature process liquids | The specified remote high-temperature version with PTFE or ceramic liner | Maximum process and cleaning temperatures, material compatibility and pressure rating |
| Underground piping or a difficult-to-access sensor location | Remote converter installed in an accessible position | Cable route, sensor-to-converter distance and environmental exposure |
| Installations where sensor immersion is expected | Remote configuration with the appropriate IP68 sensor | Permitted immersion conditions and a protected location for the IP65 converter |
| Accuracy-critical monitoring or trade measurement | Class 0.5 version assessed against the measurement duty | Operating flow range and, for trade measurement, applicable approvals and verification requirements |
Material selection should cover normal production, flushing and cleaning. A material suitable for the process liquid may need a separate compatibility check for cleaning chemicals or higher temperatures.
For slurries, provide more detail than the medium name alone. Solids content, abrasiveness and known deposits help identify the appropriate liner and electrodes.
Provide the minimum, normal and maximum flow as well as the pipe size. These details help assess the operating velocity and determine whether the selected meter size suits the measurement duty.
For billing or custody-transfer applications, confirm the required approvals and documentation separately. Class 0.5 accuracy alone does not establish eligibility for trade measurement.
Send your liquid details, flow range, temperature, pressure, pipe dimensions, installation distance and required output. A piping sketch or site photograph can help explain access and mounting constraints.
Correct magnetic flow meter installation begins with the piping layout. Review these points before commissioning.
Maintain a full measuring tube. Choose a location that remains filled with liquid during measurement. Avoid arrangements that allow the sensor to drain or air to collect in the measuring section.
Provide the recommended straight runs. LEFOO recommends at least 5D upstream and 3D downstream, where D is the pipe diameter. Check the documentation for the ordered configuration and review nearby fittings.
Confirm grounding and wiring. Follow the grounding arrangement specified for the pipe material and lining. Verify the power supply, terminal assignments and signal connections.
Leave room for access and maintenance. Position the converter where readings and controls are accessible. Follow the manual’s guidance on vibration, electrical interference and environmental protection.
Check the complete measurement chain. Verify flow units, output scaling and communication settings. Compare the local display with the receiving system before using the measurement for process decisions.
Only if the actual liquid meets the specified minimum conductivity of 30 μS/cm. Check conductivity under the intended operating conditions before selecting the meter for deionized water.
No. Provide the minimum, normal and maximum flow as well as the pipe dimensions. These details are needed to assess the operating velocity and confirm that the selected size suits the measurement duty.
No. The remote configuration separates the converter from the sensor, with the two components connected by cable. “Remote” describes the installation arrangement and does not indicate a wireless connection.
Start with the flow units, configured output range and controller scaling. Then check the wiring or communication settings. Record both readings and the operating conditions when requesting technical support.
Whether your project involves wastewater, chemical processing or another conductive liquid, the right configuration depends on the medium and the installation.
Send LEFOO your liquid details, flow range, pipe size, temperature, pressure and required output. A piping sketch or site photograph can help explain mounting and access requirements.
Explore the LEFOO LFEMF-G electromagnetic flow meter or request configuration support and a quotation for your project.
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