Magnetic flowmeters are
among the most widely used types of flowmeters for measuring the flow of
water and other liquids. They
have been around for more than 50 years.
The Tobinmeter Company first introduced magnetic flowmeters for
commercial use in Holland in 1952. Foxboro
introduced them to the United States in 1954.
Since this time, more than 60 suppliers worldwide have come to offer
magnetic flowmeters for sale.
about New Technology Flowmeters:
#1 in revenues
flowmeters generate more revenues worldwide than any other type of
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.
flowmeters are most widely used in the water & wastewater and chemical
industries, which generate about half of magmeter revenues.
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
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 &
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.
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.
further information, including detailed market reports, please see www.FlowMags.com.