XFE series of intelligent electromagnetic flowmeters working conditions 
 ● a body fluid maximum temperature: 70 ° C 
 Type of separation: 150 ° C PTFE lined neoprene lining 80 ℃ 
 Polyurethane rubber lining 70 ° C high temperature rubber 120 ° C 
 ● The fluid conductivity: ≥ 5us/cm 
 Second, the principle 
 The XFE Series intelligent electromagnetic flow meter composed of two parts of the sensor and converter. 
 2.1 The mathematical and physical model 
 Typical sensor structure as shown below, the measuring tube is equipped with upper and lower excitation coil excitation current produces a magnetic field is full of the measurement pipe from the converter, one or more pairs of electrodes mounted on the measuring tube wall (perpendicular to the direction of the magnetic field) to detect contact with the liquid and leads to the induced electromotive force through a cable to the converter for signal processing, measurement pipe wall insulation lining, high impedance Anti-SARS magnetic measurement pipeline. Lining contact with the measured fluid, corrosion, wear resistance and temperature fluid selection of different types of lining. 
 XFE series of intelligent electromagnetic flow meter measuring the original 
 Management is based on Faraday's law of electromagnetic induction: conductive 
 Liquid in a magnetic field, cutting movement of the magnetic field lines, 
 EMF, electromotive force of the size of the conductor 
 With the conductor of the velocity and magnetic induction intensity 
 Proportional to the size. 
 Figure 1, when a conductive fluid to the average velocity 
 V (m / s), equipped with a measuring electrode 
 An inner diameter D (m) insulated conduit flow 
 When the pipeline is in a uniform magnetic induction of strong 
 Is the magnetic field B (T), then a pair of power 
 The ends of the induced electromotive force (V), will produce it 
 The direction perpendicular to the direction of the magnetic field and fluid. 
 EMF E is: 
 Faraday's law of electromagnetic induction as follows: E = B?? V ① an electromagnetic flow meter operating principle 
 Volume of traffic flow: Qv = ② The 
 Can be obtained by the formula ① and ②: the QV = ③ The 

 Therefore, the electromotive force can be expressed as: ④ 

 When B is a constant, a fixed aperture D is a known quantity, the formula iii 
 (A constant), then the formula ③ can be rewritten as: 
 ⑤ 
 It can be seen from the formula ⑤ flow Qv is proportional to the emf E 
 The above formula: K ------ instrument constant B ------ magnetic induction 
 V ------ measurement within the pipe cross-section average speed ------ EMF 
 ------ Measurement pipe cross-section diameter Qv ------ physical flowmeter 
 Thus the above equation, when the structure of the measuring tube, the magnetic flux density is constant, the volume flow rate is proportional to the EMF. Measure the induced voltage can flow into the pipe volume flow. The induced voltage signal of one or more electrodes in direct contact with the liquid detection, and sent through the cable converter through intelligent processing, and then the LCD display or converted into standard signals 4-20m