Instrumentation and Meters
CV Electromagnetic Flow Meter
The electromagnetic flowmeter consists of two parts: a sensor and a converter. This product operates based on Faraday’s law of electromagnetic induction and is used to measure the volumetric flow rate of conductive liquids with a conductivity greater than 50 μS/cm. It is an inductive instrument for measuring the volumetric flow rate of conductive media. In addition to measuring the volumetric flow rate of general conductive liquids, it can also be used to measure the volumetric flow rate of highly corrosive liquids such as strong acids and strong alkalis, as well as homogeneous liquid-solid two-phase suspensions such as mud, ore slurry, and paper pulp. It is widely used for flow measurement in industrial sectors such as petroleum, chemical engineering, metallurgy, light textile, papermaking, environmental protection, and food, as well as in municipal management, water conservancy construction, river dredging, and other fields.
Product Series
CV Electromagnetic Flowmeter Measuring Principle
The CV Series electromagnetic flowmeter consists of two main parts: a sensor and a converter. The typical structure of the sensor is shown in the figure below. Excitation coils are installed on the upper and lower sides of the measuring tube. The converter supplies excitation current to generate a magnetic field that fills the measuring pipe. One or more pairs of electrodes are installed on the inner wall of the measuring tube (perpendicular to the direction of the magnetic field) and come into contact with the liquid to detect and lead out the induced electromotive force, which is then sent to the converter via a cable for signal processing. An insulating lining is installed on the inner wall of the measuring tube, forming a high-impedance, non-magnetic measuring pipe. The lining is in contact with the measured fluid, and different types of lining are selected for fluids with different corrosiveness, abrasiveness, and temperature.
Overall Dimensions of Electromagnetic Flowmeter
Main Technical Specifications of Electromagnetic Flowmeter
CV Electromagnetic Flowmeter Structure Diagram
The measuring principle of the CV-type smart electromagnetic flowmeter is based on Faraday’s law of electromagnetic induction: when a conductive liquid moves through a magnetic field and cuts the magnetic lines of force, an induced electromotive force (EMF) is generated in the conductor. The induced electromotive force E is:
E = KBVD K—————-Meter Constant B—————-Magnetic Flux Density V—————-Average Flow Velocity in the Measuring Pipe Cross-Section D—————-Inner Diameter of the Measuring Pipe Cross-Section When measuring flow, the conductive liquid flows at velocity V through a magnetic field perpendicular to the flow direction.The flow of the conductive liquid induces a voltage on the measuring electrodes that is proportional to the average flow velocity. From this, the volumetric flow rate through the pipe can be derived as: Q = 0.785DE / KB Wherein: Q—————–Volumetric Flow Rate E——————Induced Voltage
From this equation, it can be seen that when the measuring tube structure and the magnetic flux density of the magnetic field are constant, the volumetric flow rate is proportional to the induced electromotive force. By measuring the induced voltage, the volumetric flow rate through the pipe can be obtained. The induced voltage signal is detected by one or more pairs of electrodes in direct contact with the liquid and sent via a cable to the converter for intelligent processing. It is then displayed on an LCD or converted into standard output signals such as 4~20mA, frequency signals, or HART protocol communication.
Electromagnetic Flowmeter Selection Guide
Company Address
A2001-228, Floor 20, R&D Building Phase 4,
International Science and Technology Park,
No. 1355 Jinji Lake Avenue,
Suzhou Industrial Park,
Suzhou, Jiangsu, China
Email
clara@szyc-materials.com
simon@szyc-materials.com
Whatsapp
+86 13812870147