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Electromagnetic Flowmeter

Electromagnetic flowmeter A, LD type intelligent electromagnetic flowmeter LD type intelligent electromagnetic flowmeter is my company the most advanced technology research and development of all intelligent electromagnetic flowmeter, all Chinese electromagnetic converter kernel by using high-speed CPU. Calculation speed is very fast, high precision, reliable performance measurement. Converter circuit design adopt international advanced technology, input impedance is as high as 1015 ohm, common mode rejection ratio is better than 100 db, for foreign interference and 60 hz / 50 hz interference rejection capability is better than 90 db, can measure more low conductivity of fluid flow. The sensor adopts inhomogeneous magnetic field technology and special magnetic circuit structure, magnetic field is stable and reliable, and big reduces the volume, reduce repetition, make the flowmeter small flow quantitative characteristics. Enable customers to "buy the rest assure


The product features:

Inside the piping box-and-one no moving parts, unimpeded flow components, measurement almost no additional pressure loss.

Box-and-one measurement results and the velocity distribution and fluid pressure, temperature, density, viscosity, and other physical parameters have nothing to do.

Box-and-one at the scene can be based on user actual need on-line modification range.

Box-and-one high definition backlit LCD display, all Chinese menu operation, easy to use, simple operation, easy to understand.

The box-and-one SMD components and SMT (SMT circuit high reliability.

The embedded microcontroller box-and-one 16-bit processor, fast calculation speed, high precision, the programmable frequency low-frequency rectangular wave excitation and improve the flow measurement stability, low power consumption.

Box-and-one full digital quantity processing, strong anti-interference capability, reliable measurement, high accuracy, the flow measurement range can reach 150:1

Box-and-one ultra-low EMI switching power supply, the use of power supply voltage range, good resistance to EMC

Box-and-one internal has three integrator can respectively show positive accumulation and differential integrating quantity, with internal off electric clock, can record 16 times power down time

Box-and-one with RS485 and RS232, Hart and Modbus digital communication signal output.

Box-and-one has self and the theory function

Second, almost Assyria

1. The working principle

Electric meter measuring principle is based on Faraday's law of electromagnetic induction. Flowmeter measurement tube is a lining insulation material and the permeability alloy short tube. Two electrode along the pipe diameter direction pierced wall fixed in the measurement on the tube. The electrode head and lining inside surface basic flush. Excitation coil by both wave pulse excitation, will be in and measurement tube axis vertical directions on the produce a magnetic flux density of B work magnetic field. At this time, if has certain conductivity fluid flows through measuring tube. Will cut magnetic line of force induced the electromotive force E. Electromotive force E is proportional to the magnetic flux density B, measuring pipe diameter d and average flow velocity v product. Electromotive force E (flow signal) by electrode detection and through the cable sent to the converter. Converter will flow signal amplification treated, can display fluid flow, and can output pulse, analog current signal, for flow control and regulation.

E = KBdv

Type: E - - - - - - - - - - - - - - - for interelectrode signal voltage (v)

B - - - - - - - - - - - - - - - - - magnetic flux density (T)

D - - - - - - - - - - - - - - - - - - measuring pipe inner (m)

V - - - - - - - - - - - - - - - - - - average flow velocity (m/s)

Type of k, d for constant, due to the excitation current was constant current, so B is constant, the E = KBdv knowable, volume flow Q and signal voltage E - become direct ratio, namely velocity induction signal voltage E and volume Q into linear relationship. Therefore, as long as the measured E can determine the flow Q, this is the basic principle of the electromagnetic flowmeter.

By E = KBdv knowable, measured flow medium temperature, density, pressure, conductivity, solid-liquid two two phase fluid medium liquid solid component, such as the ratio of parameters will not affect measuring result. As for the flow state should accord with axisymmetric flow (such as laminar or turbulent) won't affect the measurement result. Therefore said electromagnetic flowmeter is a real volume flowmeter. For the manufacturers and users, as long as by ordinary water actual calibration and measurement any other conductive fluid medium volume flow, and don't need any correction. This is one of the prominent advantages of electromagnetic flowmeter, it is other any flowmeter do not have. Measuring tube without activities and choke components, so almost no pressure loss, and the reliability of the high points.

We warmly welcome customers from home and abroad and every consult and correspondent will draw our highly attention.
Contact Us
 : +86-29-86670248
  : +86 180 4954 2562
: Room1-1108, Yongfu Building,      Yongfu Rd, Lianhu District, Xi'an, Shaanxi, China.

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