Generic products on the market and the special type of instrument can be classified from different angles. Such as by magnetizing current mode split electromagnetic flowmeter main thread, with DC excitation, AC (other frequencies or frequency) excitation, low frequency square wave excitation and dual rectangular wave excitation. Several exciting way waveform is shown in Figure 3. Press output signal wiring and excitation (or power) connection standard classification, four-wire and two-wire system. Press converters and sensor assembly methods classification, separation type and a size. Magnetic system: its role is to generate DC or AC magnetic field uniform. DC magnetic circuit with the permanent magnet to achieve electromagnetic flowmeter threads offer the advantage of relatively simple structure, the interference by the alternating magnetic field is small, but it is easy to make by measuring the polarization of the liquid electrolyte within the conduit, the positive electrode being surrounded by negative ions, the negative electrode is surrounded by positive ions, namely the electrode polarization and lead to increased resistance between the two electrodes threaded electromagnetic flowmeters, thus seriously affecting the normal operation of the instrument. When large diameter pipes, the permanent magnet is also a great thread corresponding electromagnetic flowmeters retail, cumbersome and uneconomical, so electromagnetic flowmeters generally use an alternating magnetic field, and is 50HZ power frequency excitations. Thread electromagnetic flowmeter supplier | Shanghai Automation Instrumentation force measurement | Hefei thread electromagnetic flowmeters measure the force provided by the Shanghai Automation Instrumentation Co., 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.