LDE-250 LDE-300 Magnetic flowmeter

LDE-250 LDE-300 Magnetic flowmeter

Overview of LDE-250 LDE-300 Magnetic flowmeter

The measurement accuracy of lde-300 electromagnetic flowmeter is not affected by the changes of fluid density, viscosity, temperature, pressure and conductivity. The sensor induced voltage signal has a linear relationship with the average flow rate, so the measurement accuracy is high. There is no choke in the measuring pipeline, so there is no additional pressure loss; There are no movable parts in the measuring pipe, so the service life of the sensor is very long.

Features of LDE-250 LDE-300 Magnetic flowmeter

1. It is not affected by the changes of temperature, pressure, density, viscosity and conductivity (not less than * conductivity).
2. The sensor shell and flange are made of carbon steel or stainless steel. The electrode and lining have a variety of materials to choose from. They have the characteristics of corrosion resistance, wear resistance and long service life.
3. The sensor has simple structure, no throttling parts and no blockage, so it is suitable for the measurement of mud, pulp, mineral pulp, sewage and other media with solid particles, fibers and suspended solids.
4. The installation is simple, which can be installed at any angle of horizontal, vertical and inclination, and has low requirements for the upstream straight pipe section.
5. Display cumulative flow (ten digit display) and instantaneous flow (six digit display).
6. The operation and setting are convenient and can be set intuitively through the keyboard on the panel.
7. Zero self calibration to eliminate zero drift.
8. The measuring range can be set arbitrarily within the calibrated flow range.
9. Positive and negative flow direction measurement. If there are no special requirements, the factory is positive measurement.
10. Small signal removal function, the user can set the removal of small interfering flow through the display panel.
11. The user can set the upper and lower limit flow according to the actual needs. When the flow exceeds the upper limit or is lower than the lower limit, there is relay output.
12. Empty pipe judgment: in the working state, when the flowmeter measures the empty pipe in the pipe, the instantaneous flow empty pipe will give an alarm.

Work priciple of LDE-250 LDE-300 Magnetic flowmeter

The work of electromagnetic flowmeter is based on the law of electromagnetic induction, i.e When a conductor moves in an electromagnetic field and the direction of motion is perpendicular to Electromagnetic field will produce induced electromotive force, and the induced electromotive force The direction of potential is perpendicular to the direction of conductor motion and electromagnetic field motion
The magnitude of the stress electromotive force is related to the moving speed of the conductor and the magnetic induction of the magnetic field Directly proportional to the strength. When the conductive fluid passes through at the average velocity V (M / s)
When a tube with an inner diameter of D (m), if there is a magnetic field in the tube If the induction intensity is B (T), a vertical magnetic field can be generated Electromotive force in the direction of magnetic field and fluid flow e:
E = DVB ( V) ( 1)
Volume flow Q is:
Q = ∏D2V /4( m3 / s) ( 2)
Substitute equation (2) into equation (1) and deal with it as follows:
E = ( 4B /∏D ) XQ ( V) ( 3)
If B and D are constants, it can be seen from equation (3) that E and
Q is proportional. The electromagnetic flow converter amplifies and converts the electromotive force E
Into a standard 4 ~ 20mA signal or pulse signal as the corresponding signal
Flow signal output.

Tech data of LDE-250 LDE-300 Magnetic flowmeter