Can demineralized water be measured using electromagnetism?
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The medium is demineralized water, at room temperature and a pressure of 0.0 MPa; can it be measured using electromagnetic methods?
This post was last edited by lm101124 on 2016-11-3 at 16:45. Demineralized water contains very little or no minerals, and this can be achieved through distillation, reverse osmosis, ion exchange, or a combination of these methods. It can be said that demineralized water is water that has been artificially softened or purified ； ； ； Electromagnetic flowmeters require the medium to be conductive ； The conductivity must be at least 5 us/cm ； ； Check what level of desalinated water your household uses ； There are also free conductive ions ； ； ；
Demineralized water cannot be measured using an electromagnetic flowmeter; even if used reluctantly, the results will not be good. It is best to use a orifice plate or vortex flow meter for measurement.
When using an electromagnetic flowmeter to measure flow, the medium must be a conductive dielectric with a conductivity of ≥5 us/cm. Water with a conductivity of less than 5 us/cm at 25°C and a SiO2 content of less than 100 ug/L is referred to as grade-1 deionized water. Water with a conductivity of less than 0.2 us/cm at 25°C and a SiO2 content of less than 20 ug/L is called grade-2 deionized water. Water with a conductivity of less than 0.2 us/cm at 25°C, and concentrations of Cu, Fe, and Na below 3 ug/L as well as a SiO2 content below 3 ug/L, is known as high-purity or ultra-pure water. Therefore, electromagnetic flowmeters cannot be used to measure the flow rate of demineralized water; vortex flowmeters or differential pressure flowmeters are generally used instead
It is generally not recommended to use electromagnetic flowmeters for measuring demineralized water
The use of electromagnetic flowmeters is not recommended; even if the conductivity reaches the minimum value permitted by the product, vortex flowmeters or integrated differential pressure flowmeters (orifice, balanced, gauge type) are advised.
Electromagnetic devices should not be used for desalinated water; an vortex flow meter can be installed instead