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Electromagnetic Flowmeter
LDDC Series Electro Magnetic Flowmeter
Overview
LDDC series Electromagnetic Flowmeter is composed of sensor and convertor. It works on Faraday's electromagnetic indication principle, used for the measuring of volumetric flow rate of liquid whose conductance is greater than 5µ S/cm. It also can measure the corrosive liqiuds 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 petroluem, chemical industry, metallurgy, textile, papermaking, environmental protection, food and municipal adminstration, irrigation project, river dredge, etc.
Measuring Principle
According to the Faraday's electromganetic induction principle, pair of measuring electrodes are installed on the wall of tube whose axes are perpendicular both to the measuring tube wall axis and the madnetic flux. As the conductive liqiud cuts the magnetic flux, an induced voltage is produced. This voltage is picked up by the electrodes and is proportional to the flow rate, its value is:
LDDC series Electromagnetic Flowmeter is composed of sensor and convertor. It works on Faraday's electromagnetic indication principle, used for the measuring of volumetric flow rate of liquid whose conductance is greater than 5µ S/cm. It also can measure the corrosive liqiuds 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 petroluem, chemical industry, metallurgy, textile, papermaking, environmental protection, food and municipal adminstration, irrigation project, river dredge, etc.
Measuring Principle
According to the Faraday's electromganetic induction principle, pair of measuring electrodes are installed on the wall of tube whose axes are perpendicular both to the measuring tube wall axis and the madnetic flux. As the conductive liqiud cuts the magnetic flux, an induced voltage is produced. This voltage is picked up by the electrodes and is proportional to the flow rate, its value is:
K=Coefficient related to the distribution of magnetic field etc.
B= average flow velocity of conductive liquid
D= Distance between electodes, (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 tantalizer flow rate are displayed on the LCD. The converter has 4 - 20mA output, alarm and frequency outputs, and has Rs-485ect. Communication Connection.
- No obstacle existed the measuring tube, so the pressure loss is zero, hardly blocked.
- If the proper electrodes and lining material are adopted, then the request of anticorrosion, wear resistance can be satisfied.
- The measuring results have no relation with the physical parameters of the liquid, such as pressure, temperature, density, viscosity, conductivity rate (but not below 5µ S/cm!), etc... it is not influenced by the circumstances, so the accuracy is high, working process is stable and reliable.
- Adopt the dual row flow indicator of bacl lighted dot array, displays the instantaneous and totaled flow rates, simultaneuosly, also displays the working status, parameters, measuring units, etc...
- The measuring range of this flow meter is wide, Its range ability normally is 20:1, generally can reach 30:1 or even larger.
- This flow meter has multi-functional outputs, can be matched with computer, combined instrument unit; can meet the requirement of printing, communication and networking.