According to Faraday's principle of electromagnetic induction, a pair of detection electrodes are installed on the pipe wall perpendicular to the axis of the measuring tube and the magnetic line of force, when the conductive liquid moves along the axis of the measuring tube, the conductive liquid cuts the magnetic line of force to produce an induced potential, this induced potential is detected by the two detection electrodes, and the numerical value of the size of the flow rate is proportional to the value of:

　　E = KBVD

　　In the formula:

　　E-induced potential;

　　K - coefficient related to the magnetic field distribution and axial length;

　　B-magnetic induction strength;

　　V-mean flow rate of conductive liquid;

　　D - electrode spacing; (measuring tube diameter)

　　The sensor will sense the potential E as a flow signal, transmitted to the converter, amplified, transformed filter with a series of digital processing, with a backlit dot-matrix liquid crystal display instantaneous flow and cumulative flow. The converter has 4～20mA output, alarm output and frequency output, and is equipped with RS-485 and other communication interfaces, and supports HART and MODBUS protocols.

1、No moving parts in the pipeline, no flow-retarding parts, almost no additional pressure loss in the measurement, lower requirements for straight pipe section.

2、 Low-frequency square wave excitation, excitation frequency: 1/10 working frequency, 1/16 working frequency, 1/2 working frequency; high-frequency square wave excitation, excitation frequency: 1/2 working frequency (for slurry measurement) (optional); excitation current can be selected as 125mA, 187.5mA, 250mA;

3、Measurement results have nothing to do with the flow rate distribution, fluid pressure, temperature, density, viscosity and other physical parameters.

4、 In the field according to the user's actual need to modify the range online.

5、 High-definition backlit LCD liquid crystal display, can make the reading under direct sunlight or dark room easy. Full Chinese menu operation, easy to use, simple operation, easy to learn and understand.

6、Fast computing speed, high precision, programmable frequency low-frequency rectangular wave excitation, improve the stability of flow measurement, low power consumption.

7、All-digital processing, anti-interference ability, reliable measurement, high precision.

8、With RS485, RS232, Hart and Modbus digital communication signal output. (Optional)

9、The converter has a self-diagnostic alarm output, empty load detection alarm output, flow upper and lower limit alarm output, batch control and other functions.

10、High-pressure electromagnetic flowmeter sensor using PFA plus mesh lining technology, high-pressure resistance, anti-negative pressure, specializing in the application of petroleum, chemical and other industries.

11、The sensor adopts advanced processing technology, so that the meter has good resistance to negative pressure.

12、There are three accumulator totals inside, which can be recorded respectively: positive total, reverse total, and differential total.

13、Power-down time recording function, automatically record the instrument system power interruption time, make up for the omission of flow; hourly total recording function, hourly total recorded flow, suitable for time-sharing metering system; infrared hand-held operating keyboard, remote non-contact operation of all the functions of the converter.

14、Chinese, English display, (can be customized for other languages).