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Magnetic flowmeters, among the most widely used types of flowmeters for measuring the flow of water and other liquids, have been around for more than 50 years.  The Tobinmeter Company first introduced magnetic flowmeters for commercial use in Holland in 1952.  Foxboro (now part of Schneider Electric) introduced them to the United States in 1954. Since this time, more than 60 suppliers worldwide have come to offer magnetic flowmeters for sale.  

#1 in revenues

Magnetic flowmeters generate more revenues worldwide than any other type of flowmeter. The story is different in terms of units, however. More positive displacement, turbine, DP, and variable area flowmeters are sold annually. Despite this, the higher average selling price of magnetic flowmeters enables them to generate more revenues annually.

Magnetic flowmeters are most widely used in the water & wastewater and chemical industries, which generate about half of magmeter revenues.  Mageters are also widely used in the food & beverage and pharmaceutical industries, which often require flowmeters to conform to sanitary requirements.  Flowmeter suppliers meet these requirements in part by placing sanitary liners inside the meters.

Liners -- the 'secret sauce' of magnetic flowmeters

Liners enables magmeters to measure both very dirty and very clean liquids. With the appropriate liner option, they can measure the dirty liquids and slurries common to the pulp & paper and wastewater industries, as well as the hygienic and sanitary liquids common to the food & beverage and pharmaceutical industries. 

Of the nine main types of liners for magnetic flowmeters the most dominant are PFA (perfluoroalkoxy), PTFE (polytetrafluoroethylene) -- TeflonŽ is a familiar trade name for PTFE made by DuPont -- and hard rubber. Hard rubber is widely used for water & wastewater applications. 

Liners increase magnetic flowmeters' durability and reliability, and make it possible to use them with almost any type of liquid. No other flowmeter that measures liquids has such versatility when it comes to the material in the flowmeter that makes contact with the liquid.

Learn more about New-Technology Flowmeters:

Greater conductivity

The inability of magnetic flowmeters to measure nonconductive liquids will always be a barrier to their use in the oil & gas and refining industries, barring some unforeseen technological breakthrough. However, suppliers have succeeded in reducing the amount of conductivity required to measure flow, in part by boosting the amount of power used to excite the magnetic coils, thereby creating a stronger signal. By pushing back the boundaries of conductivity, suppliers are making magnetic flowmeters usable in a broader range of applications. 

Popular in Europe

Magnetic flowmeters are especially popular in Europe, where they were first introduced and where the top three magnetic flowmeter suppliers today are based. Water is a highly valued resource in Europe, and magmeters are widely used to measure the flow of water. Food processing and pulp & paper are both very prevalent industries in Europe, and magmeters are heavily used in both of these industries.

Europeans also seem to show a preference for spoolpiece over clamp-on meters, and most magnetic flowmeters are of the inline type, whether wafer or flanged. There are no clamp-on magnetic meters, but there are clamp-on ultrasonic meters, and ultrasonic meters are an alternative to magmeters for some applications. 

For further information, including detailed market reports, please see www.FlowMags.com.

Flow Research, Inc. | 27 Water Street | Wakefield, MA 01880 | (781) 245-3200 | (781) 224-7552 (fax) | (800) 245-1799 (from the USA) | info@flowresearch.com

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