Magnetic Flow Meters
Working Principles of Electromagnetic Flow Meters
Electromagnetic flow meters operate based on Faraday’s Law of Electromagnetic Induction, which states that a voltage is induced when a conductive fluid flows through a magnetic field. The flow meter consists of a flow tube with electrodes that come into contact with the fluid and coils that generate a magnetic field perpendicular to the flow direction. As the conductive liquid moves through the magnetic field, an electromagnetic force (emf) is induced between the electrodes. This induced voltage, which is proportional to the fluid’s velocity, is detected by the electrodes and converted into a flow rate by the transmitter. The result is a highly accurate measurement of the fluid’s flow.
Magnetic Flow Meter for Water and Wastewater (MTF-W)
Accuracy
Standard: ±0.5 %, Optional: ±0.2 %
Measuring Range
1 m³/h to 125000 m³/h
Medium Temperature Range
PU：0 to 140°F (-18 to 60°C)
Neoprene：-13°F to 176°F (-25°C to +80°C)
PTFE：-13 to 300°F (-25 to 150°C)
Max. Process Pressure
100 bar (1450.38 psi)
Remote Electromagnetic Flow Meter (MTF-F-200)
Accuracy
Standard: ±0.5 %, Optional: ±0.2 %
Measuring Range
0.3 m³/h to 125000 m³/h
Medium Temperature Range
PU：0 to 140°F (-18 to 60°C)
Neoprene：-13°F to 176°F (-25°C to +80°C)
IR：-13°F to 176°F (-25°C to +80°C)
FEP：-13 to 300°F (-25 to 150°C)
PTFE：-13 to 300°F (-25 to 150°C)
ETFE：-40 to 356°F (-40 to 180°C)
PFA：-40 to 356°F (-40 to 180°C)
Max. Process Pressure
100 bar (1450.38 psi)
Flanged Electromagnetic Flow Meter (MTF-F-100)
Accuracy
Standard: ±0.5 %, Optional: ±0.2 %
Measuring Range
0.3 m³/h to 125000 m³/h
Medium Temperature Range
PU：0 to 140°F (-18 to 60°C)
Neoprene：-13°F to 176°F (-25°C to +80°C)
IR：-13°F to 176°F (-25°C to +80°C)
FEP：-13 to 300°F (-25 to 150°C)
PTFE：-13 to 300°F (-25 to 150°C)
ETFE：-40 to 356°F (-40 to 180°C)
PFA：-40 to 356°F (-40 to 180°C)
Max. Process Pressure
100 bar (1450.38 psi)
Insertion Magnetic Flow Meters (MTF-I)
Accuracy
Standard: ±1.5 %
Measuring Range
16 m³/h to 125000 m³/h
Medium Temperature Range
< 80°C (176°F)
Max. Process Pressure
25 bar (362.6 psi)
Electromagnetic Flowmeter for Low Conductivity Liquids (MTF-C)
Accuracy
Standard: ±1 %, Optional: ±0.5 %
Measuring Range
1 m³/h to 125000 m³/h
Medium Temperature Range
PU：0 to 140°F (-18 to 60°C)
Neoprene：-13°F to 176°F (-25°C to +80°C)
IR：-13°F to 176°F (-25°C to +80°C)
FEP：-13 to 300°F (-25 to 150°C)
PTFE：-13 to 300°F (-25 to 150°C)
ETFE：-40 to 356°F (-40 to 180°C)
PFA：-40 to 356°F (-40 to 180°C)
Max. Process Pressure
40 bar (580.15 psi)
Electromagnetic Flow Meter for Slurry (MTF-S)
Accuracy
Standard: ±0.5 %, Optional: ±0.2 %
Measuring Range
9 m³/h to 11500 m³/h
Medium Temperature Range
PU：0 to 140°F (-18 to 60°C)
FEP：-13 to 300°F (-25 to 150°C)
ETFE：-40 to 356°F (-40 to 180°C)
PFA：-40 to 356°F (-40 to 180°C)
Max. Process Pressure
63 bar (913.74 psi)
Sanitary Magnetic Flow Meters (MTF-A)
Accuracy
Standard: ±0.5 %, Optional: ±0.2 %
Measuring Range
0.3 m³/h to 300 m³/h
Medium Temperature Range
FEP：-13 to 300°F (-25 to 150°C)
PTFE：-13 to 300°F (-25 to 150°C)
PFA：-40 to 356°F (-40 to 180°C)
Max. Process Pressure
40 bar (580.15 psi)
Magnetic Flow Meter for High Temperature Medium (MTF-H)
Accuracy
Standard: ±0.5 %, Optional: ±0.2 %
Measuring Range
0.3 m³/h to 5000 m³/h
Medium Temperature Range
FEP：-13 to 300°F (-25 to 150°C)
PTFE：-13 to 300°F (-25 to 150°C)
ETFE：-40 to 356°F (-40 to 180°C)
PFA：-40 to 356°F (-40 to 180°C)
Max. Process Pressure
40 bar (580.15 psi)
Battery Powered Magnetic Flowmeter (MTF-B)
Accuracy
Standard: ±0.5 %
Measuring Range
0.15 m³/h to 9000 m³/h
Medium Temperature Range
PU：0 to 140°F (-18 to 60°C)
Neoprene：-13°F to 176°F (-25°C to +80°C)
PTFE：-13 to 300°F (-25 to 150°C)
Max. Process Pressure
100 bar (1450.38 psi)
Benefits of Magnetic Flow Meters
High Accuracy
Mag meters provide accuracy levels around ±0.2% to ±0.5%, essential for precise measurements in sectors like pharmaceuticals.No Moving Parts
The design minimizes mechanical wear and pressure loss, reducing maintenance costs and enhancing durability.Versatility
They are suitable for various conductive fluids, including slurries, dirty water, and corrosive chemicals, making them ideal for industries like wastewater treatment and mining.Bi-directional Measurement
These meters can measure flow in both directions, beneficial in dynamic flow environments.Insensitive to Fluid Properties
Changes in fluid density, viscosity, temperature, or pressure do not affect the measurements, ensuring consistency under varying conditions.Low Maintenance
With minimal components in contact with the fluid, maintenance is limited to periodic calibration and electrode cleaning.
Common Types of Electromagnetic Meters
In-Line Magnetic Flow Meters
Installed directly into pipelines, offering the highest accuracy for precise measurements.Insertion Mag Flow Meters
Cost-effective for large pipes, providing slightly lower accuracy but easier installation.Battery-Powered Flow Meters
Ideal for remote locations where power is a concern.Sanitary Eletromagnetic Flow Meters
Designed for hygiene-sensitive industries like food and pharmaceuticals.
Applications of Mag Meters
- Water and Wastewater Treatment
- Agricultural and Irrigation Systems
- Chemical and Petrochemical Industries
- Pharmaceutical Industry
- Food and Beverage Industry
- Mining and Pulp & Paper Industry