Electromagnetic flowmeter measurements are affected by the presence of oil and suspended solids in the wastewater:
- （1）Electromagnetic flowmeter measurement principle is Faraday's law of electromagnetic induction, that is, the conductor in the magnetic field cuts the magnetic line of motion at both ends of the induced electromotive force, the induced electromotive force through the amplification of the liquid flow rate calculated after processing.
- （2）When the water contains more oil and suspended matter, it affects the conductivity of the sewage, which in turn affects the metering accuracy of the sewage.
- （3）The treated sewage from the sewage station and the sewage injected from the water injection station contain low oil and suspended solids, and the electromagnetic flowmeter measurement accuracy is high.
Summarize
- （1）Electromagnetic flowmeter is not suitable for measurement in sewage containing oil, treated sewage is suitable for electromagnetic flowmeter measurement.
- （2）When the amount of oil in the water, suspended solids more time shall be used for electromagnetic flowmeter with sewage standard samples for verification, to determine to meet the measurement requirements, before use.
- （3）Electromagnetic flow meters used in water injection stations are treated sewage and fresh water.
Therefore, electromagnetic flow meter manufacturers in the sewage measurement need to fully consider the impact of sewage water quality on its measurement, try to improve its accuracy in practical applications.
