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Measuring principle
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Magnetic flowmeters are designed to measure the flow of electrically charged liquids in a closed pipe. They are volumetric flow measuring devices. Therefore the fluid must be conductive. The principle of operation of the magnetic flowmeter is based on Michael Faraday¡¯s Law of Electromagnetic Induction.Faraday¡¯s law of induction states that a voltage is induced in a conductor moving in a magnetic field. In electromagnetic measuring, the flowing medium corresponds to the moving conductor. The induced voltage is proportional to the flow velocity and is detected by two measuring electrodes and transmitted to the amplifier.Flow volume is computed on the basis of the pipe¡¯s diameter. The constant magnetic field is generated by a switched direct current of alternating polarity.

Application guidelines

Electromagnetic flowmeter for bidirectional measurement of liquids with a minimum conductivity of 5 ¦ÌS/cm ¨C in particular fluids with solids, and fluids which are abrasive, inhomogeneous or tend tobuild-up,
For example:
.Chemical/mechanical pulps, paper pulp or wood pulp
with solids contents up to 15 Vol.-%
.Fruit mashes, fruit concentrates and final products
.Slurries containing high amounts of sand or stone with
an abrasive effect, e.g. ore slurry or mortar
.Chemically inhomogeneous fluids (e.g. additives)
.Thick wastewater sludges
.Natural rubber, hard rubber, polyurethane, PTFE or PFA linings

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