Product introduction
The clamp type electromagnetic flowmeter measures the flow according to Faraday's law of electromagnetic induction. The advantage of electromagnetic flowmeter is that the pressure loss is very small, and the flow range can be measured. The ratio of the maximum flow rate to the minimum flow rate is generally more than 20:1, the applicable industrial pipe diameter range is wide, the output signal and the measured flow rate are linear, the accuracy is high, and the liquid with electrical conductivity ≥ 5μs /cm can be measured.
The clamp-type installation method of the electromagnetic flowmeter has the advantages of convenient installation and cleaning, and is often used in food production, pharmaceutical measurement and water purification monitoring.
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Working principle
According to Faraday's electromagnetic induction principle, a pair of detection electrodes are installed on the wall of the tube perpendicular to the axis of the measuring tube and the magnetic force line. When the conductive liquid moves along the axis of the measuring tube, the conductive liquid cuts the magnetic force line to generate the induced potential, which is detected by the two detection electrodes. The value is directly proportional to the flow rate, and its value is as follows:
E=KBVD
Formula:
E-induced potential;
K- coefficient related to magnetic field distribution and axial length;
B- magnetic induction intensity;
V- average velocity of conductive liquid;
D- electrode spacing; (Measure tube diameter)
The sensor transmits the induced potential E as the flow signal to the converter, which is amplified, transformed and filtered by a series of digital processing, and displays the instantaneous flow and cumulative flow with the dot matrix liquid crystal with backlight. The converter has 4 ~ 20mA output, alarm output and frequency output, and is equipped with RS-485 communication interface, and supports HART and MODBUS protocols.
Product advantage
1, the use of new sanitary lining materials to prevent the accumulation of measuring medium residues in the measuring tube;
2, the measuring pipe has no obstructing moving parts, no pressure loss, and the requirements of the straight pipe section are low;
3, the sensor adopts a new generation of special lining technology, and uses a special mirror-polished PFA lining;
4, intelligent converter can simultaneously display volume flow percentage, instantaneous flow, cumulative flow and other measurement data;
5, the use of fast connection scheme, electromagnetic flowmeter is easy to disassemble, maintenance and cleaning, intelligent converter using liquid crystal backlight LED display, even in strong light or at night can also read clearly.
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Technical parameter
Application field
Electromagnetic flowmeter is used in: petroleum, chemical, steel, food, power, paper, metallurgy, water supply and drainage, petrochemical, medical and other industries.
