Principle and structure

The measurement principle of the intelligent electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The intelligent electromagnetic flowmeter consists of a sensor and a converter. The sensor is installed on the measuring pipe. The converter can be combined with the sensor and connected together to be called an integrated electromagnetic flowmeter. The converter is installed within 30 meters or 100 meters from the sensor. The two are connected by a shielded cable and are called a separate electromagnetic flowmeter. The main components of the intelligent anti-corrosion electromagnetic flowmeter sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell. The measuring tube of the flowmeter is a short non-magnetic alloy tube lined with insulating material. The two electrodes are fixed on the measuring tube through the pipe wall along the pipe diameter. The electrode head is basically flush with the inner surface of the lining. When the excitation coil is excited by a double-wave pulse, a working magnetic field with a magnetic flux density of B will be generated in the direction perpendicular to the axis of the measuring tube. At this time, if a fluid with a certain conductivity flows through the measuring tube. The measured medium flows through the pipeline and cuts the magnetic lines of force, generating an induced electromotive force E. The electromotive force E is proportional to the magnetic flux density B, the product of the inner diameter d of the measuring tube and the average flow velocity v. The electromotive force E (flow signal) is detected by the electrode and sent to the converter through the cable. After the converter amplifies the flow signal, it can display the fluid flow rate and output pulses, analog current and other signals for flow control and regulation.
 

Scenario application

Product features

1. Measurement is not affected: The measurement is not affected by changes in fluid density, viscosity, temperature, pressure and conductivity.

2. No obstruction to flow components: There are no obstruction to flow components in the measuring tube, no pressure loss, and the straight pipe section requirements are low.

3. Series nominal diameter: The series nominal diameter is DN15~DN3000, and there are many options for sensor lining and electrode materials.

4. Novel excitation method: The converter adopts a novel excitation method with low power consumption, stable zero point and high accuracy. The flow range can reach 1500:1.

5. Converter: The converter can be integrated or separated with the sensor.

6. Reliable programming: The converter adopts a 16-bit high-performance microprocessor and 2x16LCD display, which is convenient for parameter setting and reliable programming.

7. Bidirectional measurement system: The flow meter is a bidirectional measurement system with three integrators: forward total, reverse total and differential total; it can display reverse flow and has multiple outputs: current, pulse, digital communication, HART.

8. Surface mounting technology: The converter adopts surface mounting technology and has self-test and self-diagnosis
 

Implementation standards

Structural material: lining material

Electrode material

Reference flow range