An electromagnetic flowmeter, also called a magnetic flow meter or mag meter, measures the flow of conductive liquids in closed pipelines. It is widely used in water supply, wastewater, chemical, food and beverage, pulp and paper, mining and many other industries.

It works on Faraday's law of electromagnetic induction. Coils in the sensor generate a magnetic field across the pipe. When a conductive liquid flows through this field, it induces a voltage that is proportional to the flow velocity. Electrodes pick up this voltage, and the transmitter converts it into flow velocity and flow rate.

It can measure almost all conductive liquids, such as raw water, tap water, wastewater, acids, alkalis, salt solutions, slurries and pulp. The liner and electrode materials must be compatible with the liquid.

It cannot measure gases, steam, or non-conductive liquids such as oils and most organic solvents. Standard models also need a minimum liquid conductivity. For these applications, consider our vortex flowmeters, mass flowmeters or ultrasonic flowmeters. For liquids with low conductivity, see the MIK-FMC400 Low Conductivity Electromagnetic Flow Meter and contact us to confirm suitability.

Choose by application:

• General conductive liquids: MIK-LDG-A100
• Water and general industrial pipelines: MIK-LDG Carbon Steel Body
• Corrosive environments: MIK-LDG Stainless Steel Body
• Transmitter installed away from the sensor: MIK-LDG Remote Type
• Food and beverage processing: MIK-LDG Sanitary
• Hazardous areas: MIK-LDG-A100D Explosion-Proof
• Low-conductivity liquids: MIK-FMC400
• Compact installation with easy commissioning: MIK-FMX240 Compact
• Sites without mains power: MIK-FMC800 Battery Powered
• Large pipes: MIK-LDG Insertion Type
• Thermal energy metering: MIK-LDGR Electromagnetic BTU Meter
• Replacement or separate transmitter: Magnetic Flow Transmitter

If you are unsure, send us your application details and our engineers will recommend a model.

In an integrated type, the transmitter is mounted directly on the sensor, which saves space and wiring. In a remote type, the transmitter is installed separately and connected by cable. The remote type is useful when the measuring point is hard to reach, exposed to vibration or high temperature, or located in a pit or area that may be flooded. See the MIK-LDG Remote Type.

A carbon steel body is commonly used for water supply, wastewater and general industrial applications. A stainless steel body offers better corrosion resistance for corrosive environments. The body material is separate from the wetted parts (liner and electrodes), which must be selected according to the liquid.

Yes. The MIK-LDG Sanitary Electromagnetic Flowmeter is designed for food processing applications. Please contact us with your process and connection requirements.

Yes. The MIK-LDG-A100D Explosion-Proof Electromagnetic Flowmeter is designed for hazardous areas. It supports 4–20 mA, pulse and RS485 (Modbus RTU) outputs. Please tell us the hazardous area classification of your site when requesting a quotation.

Yes. The MIK-FMC800 Battery Powered Electromagnetic Flowmeter uses an internal battery and needs no external power supply. It is suitable for sites where the power grid cannot reach or cabling is difficult.

Asmik electromagnetic flowmeters cover pipe sizes from small to large diameters, across a range of approximately DN2 to DN3000 depending on the model. For large pipes, the MIK-LDG Insertion Type can be a cost-effective option. Please check each product page for its size range.

Yes. The MIK-LDGR Electromagnetic BTU Meter measures thermal energy in British thermal units (BTU), for example chilled water consumption in commercial and industrial buildings.

Yes. The Magnetic Flow Transmitter features an LCD display and simple parameter setting. Sensor diameter, liner material, electrode material and flow coefficient can be configured, and intelligent diagnostics help with maintenance.

Electromagnetic flowmeters offer high accuracy and repeatability for precision control and metering. Accuracy depends on the model and conditions. For example, the MIK-LDG-A100 offers ±0.5% of measured value, and ±0.3% for selected pipe sizes, within 0.5–5 m/s. Please check each product page for its specification.

Selection depends on the liquid's corrosiveness, abrasiveness and temperature. Common liner options include rubber (such as CR), polyurethane (PU) and PTFE/F46; common electrode materials include stainless steel 316L, Hastelloy, titanium, tantalum and platinum. Available options vary by model. Send us your medium and operating conditions and we will recommend a suitable combination.

• The pipe must be completely full of liquid at the measuring point.
• Provide enough straight pipe upstream and downstream; for example, the MIK-LDG-A100 requires at least 10 DN upstream and 5 DN downstream.
• Avoid the highest point of the pipeline, where air can collect; vertical pipes with upward flow are preferred.
• Ground the sensor properly for a stable signal.
• Keep away from strong magnetic fields and heavy vibration, or choose a remote type.

Please follow the installation manual of the selected model.

Yes. Electromagnetic flowmeters support bidirectional measurement of forward and reverse flow.

It uses a full-bore design with no moving parts and no throttling components, so pressure loss is negligible and long-term operation can be nearly maintenance-free. For liquids that form deposits, periodic electrode inspection is recommended.

Common options include 4–20 mA, pulse output and RS485 (Modbus RTU), with HART available on some models. Available outputs vary by model; please check the product page or ask our team.

• Electromagnetic: conductive liquids, including dirty water and slurries; no pressure loss.
• Ultrasonic: liquids including non-conductive ones; clamp-on versions can be installed without cutting the pipe.
• Vortex: gases, steam and clean liquids.

Typical industries include water and wastewater, food and beverage, pulp and paper, mining, oil and gas, chemical, textile and dyeing, energy storage and cooling, and HVAC. Typical tasks include liquid monitoring, filling, dosing and metering.

To help us select the correct model, please provide:

• Liquid name and conductivity
• Flow range (min / normal / max)
• Pipe size and process connection standard
• Liquid temperature and working pressure
• Presence of solids, abrasives or corrosive components
• Integrated or remote type
• Power supply (AC, DC or battery)
• Output and communication requirements
• Special requirements (e.g., hazardous area, sanitary design) and quantity

Send your requirements to info@asmik.com or contact us via WhatsApp at +86 13325716921.