Electromagnetic Flowmeter
| |
|
|
LD series Electromagnetic Flowmeter is composed of sensor and converter. It works on Faraday's electromagnetic indiction principle , used for the measuring of volumetric flowrate of liquid whose conductance is greater than 5 μS/cm. It also can measure the corrosive liquids as strong acid, alkali etc., and two phase(liquid-solid)suspensions as mud, ore pulp, paper pulp, etc. It is widely applied in the field of petroleum, chemical industry, metallurgy, textile, papermaking, environmental protection, food and municipal administration, irrigation project, river dredge etc.
|
 |
|
Measuring Principle
|
|
|
| |
|
ccording to the Faraday's electromagnetic induction principle, a pair of measuring electrodes are installed on the wall of tube whose axes are perpendicular both to the measuring tube wall axis and the magnetic flux. As the conductive liquid is moving along the tube axis , the conductive liquid cuts the magnetic flux, an induced voltage is produced. This voltage is picked up by the electrodes and is proportional to the flowrate , its value is:
E=KBVD
E=Induced voltage
K=Coefficient related to the distribution of magnetic field etc.
B=Magnetic flux intensity
V=Average flow velocity of conductive liquid
D=Distance between electrodes,(inner diameter of tube)
The induced voltage E is regarded as the flow signal of the sensor and is transmitted to the converter. After through amplifying, converting, filtration and a series of digital treatment the instantaneous and totalizer flowrate are displayed on the LCD.
The converter has 4~20mA output , alarm and frequency outputs , and has Rs-485 ect. communication connection.
|
| |
 |
 |
| ZA Integrated Flow-meter |
ZB Integrated Flow-meter |
| Integrated type |
 |
 |
ZA Intelligent converter
ZB Intelligent converter |
| LD sensor |
Separating type
|
|
