Chapter 2 Introduction
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performance of the measured medium. It is also equipped with 1-2
grounding electrodes for grounding and anti-interference of flow signal
measurement.
(5) Measuring tube: The measured medium flows through the measuring tube.
It is made by welding non-magnetic stainless steel and flange, and the inner
side is equipped with insulation lining.
(6) Excitation coil: A group of coils is arranged on the upper and lower side of
external side of the measuring tube respectively to generate a working
magnetic field.
(7) Casing: Protect and seal the meter.
2.4. Application introduction
Electromagnetic flowmeter applies only to measure the real-time flow rate of an
electrically conductive liquid or liquid-solid two-phase flow, and has a flow
accumulation function. Theoretically, an ordinary type electromagnetic flowmeter
can measure the medium conductivity of not less than 5 μS/cm, but it’s proved that
the measured conductivity by the ordinary electromagnetic flowmeter is higher than
one to two orders of magnitude, at least more than 50μ S/cm. Meanwhile,
the conductivity measured online must prevail, for that measured offline may
be relatively higher due to carbon dioxide and nitrogen dioxide contained in the air
may dissolve into the medium.
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