The basic principle is the emf Faraday's law of electromagnetic induction, that cut the conductor in a magnetic field induced electromotive force at both ends of the movement when the magnetic field lines. As shown, the conductive liquid flow proportional generate EMF in a direction perpendicular to the flow of electromagnetic flowmeters retail explosion in the non-magnetic measuring tube magnetic field perpendicular to the flow direction, the direction of force by "Fleming's right-hand 1 Rules ", the value of the formula wherein e ----- induced electromotive force, i.e. the flow rate signal, v; k ----- coefficient; b ----- magnetic induction, t; d ---- measuring tube the inner diameter of proof electromagnetic flowmeter, m; --- average velocity, m / s. Set the volume of liquid flow, where k is the instrument constant proof electromagnetic flowmeter quote, k = 4 kb / πd. emf consists of two parts the flow sensor and converter. A typical sensor structure shown in Figure 2, the measuring tube is equipped with upper and lower excitation coil produces a magnetic field passing through the measuring tube after excitation current through a pair of electrodes attached to the inner wall of the measuring tube in contact with the liquid phase, leads EMF proof electromagnetic flowmeter Main, to the converter. Excitation current provided by the converter. Do not simply look at the high comparative indicators in a variety of model selection, to read the detailed instructions factory sample or do a comprehensive analysis. Functional differences emf on the market is also a great, simple way to measure the flow rate is only driven by the output analog signal after digital instrumentation; multi-functional measuring instrument has a two-way flow, range switching, the lower limit flow alarm, air traffic control and power cut off alarm , low-cut, and the total calculated flow display, automatic check and fault diagnosis, and PC communication and movement configuration and so on. Some models meter serial digital communication Optional variety of communication interfaces and ASIC (asic), to connect the hart protocol system, proftbus, modbus, config, ff Fieldbus. Proof electromagnetic flowmeter supplier _ Shanghai Automation Instrumentation force probe _ Gansu proof electromagnetic flowmeter force measured by the Shanghai Automation Instrumentation Co., Ltd. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) is the Shanghai Zhabei District, flow meters leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In force since the instrument measuring leadership with the staff warmly welcome all inquiries negotiations to create the force measuring instrument from a better future.