Magnetic Flow Meter

The Magnetic flow meters are known as electromagnetic flow meter or more commonly just called a mag a very famous after the turbine flow meters and positive displacement flow meter.  A magnetic field is applied to the metering tube, which results in a potential difference proportional to the flow velocity perpendicular to the flux lines.

Electromagnetic flow meter  is a volumetric flowmeter which does not have any moving parts and is ideal for waste water applications or any dirty liquid which is conductive or water based. Magmeter will generally not work with hydrocarbons, distilled water and many non-aqueous solutions). Magnetic flow meters are also ideal for applications where low pressure drop and low maintenance are required.


Magnetic flow meters use Faraday’s Law of Electromagnetic Induction to determine the flow of liquid in a pipe. In a magnetic flow meter, a magnetic field is generated and channeled into the liquid flowing through the pipe. Following Faraday’s Law, flow of a conductive liquid through the magnetic field will cause a voltage signal to be sensed by electrodes located on the flow tube walls. When the fluid moves faster, more voltage is generated. Faraday’s Law states that the voltage generated is proportional to the movement of the flowing liquid. The electronic transmitter processes the voltage signal to determine liquid flow.


There are some specific things to note when choosing electromagnetic flow meter are

  • Is the fluid conductive or water based?
  • Is the fluid or slurry abrasive?
  • Do you require an integral display or remote display?
  • Do you require an analog output?
  • What is the minimum and maximum flow rate for the flow meter?
  • What is the minimum and maximum process pressure?
  • What is the minimum and maximum process temperature?
  • Is the fluid chemically compatible with the flow meter wetted parts?
  • What is the size of the pipe?
  • Is the pipe always full?


Kind of Electromagnetic Flow Meter :

The iMAG-Series is the most economical flanged electromagnetic flowmeter on the market. It is used in 3” to 12” pipe in municipal or industrial water, waste or reclaimed water, pump stations and packaged plant applications. The iMAG has no moving parts and electrodes are designed to discourage fouling. This magmeter requires more 


The WMP-Series is a full-bore, plastic-bodied electromagnetic flow meter designed for flow and usage monitoring applications in 1, 2 and 3 inch pipe. The polypropylene flow tube offers corrosion resistance to a wide range of chemicals and fertilizers. It is light weight and easy to install or remove from the pipe for
inspection*.     read more…


The Insertion Electromagnetic Flow meter are adjustable depth insertion magnetic flowmeters
that fi t 3” to 48” pipe (up to 72” optional). The complete lack of moving parts of the EX800/100/200-Series is the source  of its reliability. Brass and stainless steel models withstand a variety of temperature, pressure, and chemical conditions. The EX-Series has no rotor to stop turning in dirty water and there are no bearings to wear out.  read more