In industrial production, such as petroleum, chemical, pharmaceutical and other industrial production in the measured medium has a strong corrosive or with solid particles, need a kind of detecting element do not contact directly with medium flow measurement instrument.
is a typical representative of this type of measuring instrument.
In this paper, the working principle of electromagnetic flowmeter and its advantages and disadvantages of has a brief introduction.
Detection principle of electromagnetic flowmeter practical electromagnetic flowmeter is shown in figure 5 & ndash;
8, electromagnetic flowmeter is made using the electromagnetic induction principle of flow measurement instrument, can be used to measure the rate of flow of conducting liquid.
Electromagnetic flowmeter is a concrete application of law of electromagnetic induction, as shown in figure 5 & ndash;
9, when conducting the movement in the pipe, the measured medium cutting lines, an induced electromotive force on the direction of pipe diameter, flow rate, the more pleasure should be potential, the greater the liquid filled the entire pipeline, pipe diameter and magnetic field intensity, the induction electric potential is proportional to the volume flow rate.
The characteristics of the electromagnetic flowmeter advantages: the pressure loss is small, suitable for containing particles, suspended solids and other fluid flow measurement;
Can be used to measure the rate of flow of corrosive medium;
The flow measurement range is wide;
Flow meter diameter small to 1 mm, to 2 m above;
Measurement accuracy is 0.
5 ~ 1.
The output of the electromagnetic flowmeter has a linear relation with flow;
Quick, can measure pulse flow.
Disadvantages: conducting liquid must be measured medium, cannot be used for gas, steam and oil products flow measurement;
Velocity measurement threshold limits;
Work pressure is limited.
Structure is more complex, high cost.
In this paper by embellish instrument technology co. , LTD. Arrange release.
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