High Precision Electromagnetic Flowmeter for Conductive Liquid

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: EM-01
• Main Application: Water, Wastewater, Corrosive Liquid/Gas
• Application: Industrial Production
• Type: Electromagnetic Flow Meter
• Measuring Media: Liquid
• Certification: CE, ISO
• Nominal Pressure: 0.6MPa-42MPa
• Velocity Range: 0.1m/S-15m/S
• Relative Temperature: 5%-95%
• Dielectric Conductivity: >=20us/Cm
• Transport Package: Carton
• Specification: DN6-3000mm
• Trademark: YH
• Origin: Hebei, China
• HS Code: 9026100000
• Production Capacity: 50000 PCS/Year

Product Description

Detailed Photos

Product Description

Item	Parameters
Nominal diameter	DN6-3000mm
Power supply	24VDC, 220VAC, 3.6V battery powered
Electrode	SS316L, HB, HC, Ti, Ta, Pt, WC
Liner	CR (<60ºC), PU (<80ºC), PTFE (<120ºC), F46 (<180ºC), FPM (<180ºC)
Rated pressure	0.6-4.0Mpa (high pressure customizable)
Connection type	thread connection (DN4-50mm)  tri-clamp connection (DN4-100mm)  Flange type (DN10-3000mm)
Structure	Integrated type, Remote type, Insertion type
Protection level	IP65/IP68
Remote type cable	10m (standard configuration)
Output communication	Pulse, 4-20mA, RS485 MODBUS (Standard configuration) Hart, GPRS, Profibus (Optional)
Explosion proof	Ex d ia [ia Ga] q II C T6 Gb

 

OVERVIEW

1.1 Instrument Features and Uses

1. The measurement is not affected by changes in fluid density, viscosity, temperature, pressure and electrical rate;

2. There are no blocking parts in the measuring pipe, no pressure loss, low requirements for straight pipe sections, and unique adaptability to slurry measurement.

3. Nominal diameter DN6-DN3000 covers a wide range, there are various options for lining and electrodes, it can be suitable for various measurement media, and has good corrosion resistance and wear resistance;

4. The converter adopts programmable frequency low-frequency rectangular wave excitation, which improves the stability of flow measurement and reduces power loss;

5. The converter adopts 32-bit embedded microprocessor, all-digital processing, fast calculation speed, strong anti-interference ability, reliable measurement, high accuracy, the flow measurement range can reach 1500:1, and the range can be modified online according to the actual needs of users;

6. High-definition backlight LCD display, optional Chinese and English menu operation, easy to use, simple to operate, easy to learn and understand;

7. With digital communication signal output such as RS485-MODBUS, RS232, Hart and Profibus (optional);

8. With conductivity measurement function, it can judge whether the sensor is empty or not, with self-test and self-diagnosis functions;

9. Adopt SMD devices and surface mount (SMT) technology, with high circuit reliability;

10. Infrared hand terminal operation, 115KHZ communication rate, long-distance non-contact operation of all functions of the converter (optional);

11. There are three internal meters that can display the forward cumulative amount, the reverse cumulative amount and the difference cumulative amount respectively. There is a power-down clock inside, which can record the power-down time (optional);

12. Can be used in corresponding explosion-proof occasions.

1.2 Application

Electromagnetic flowmeters can be used to measure the volume flow of conductive fluids in closed pipes, and can also be used to measure the volume flow of corrosive liquids such as strong acid and alkali, and uniform liquid-solid mixed liquids such as mud, pulp, and pulp. It is widely used in flow measurement and control in industrial and agricultural production processes such as petrochemical industry, iron and steel metallurgy, water supply and drainage, water conservancy irrigation, water treatment, environmental protection sewage measurement and control, papermaking, medicine, food and other industrial and agricultural production processes.

WORKING PRINCIPLE

The working principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction, as shown in Figure 1. When a conductor moves in the magnetic field, an induced electromotive force (E) will be generated at both ends of the conductor in the direction perpendicular to the direction of the magnetic field and the moving direction. is proportional to the magnetic induction intensity, its value is: E=B.V.D.K

In the formula:

K-coefficient related to magnetic field distribution and axial length

B-magnetic induction

V-average flow rate of conductive liquid

D-electrode spacing (inner diameter of measuring tube)

The working principle of the insertion electromagnetic flowmeter is the same as that of the pipeline electromagnetic flowmeter, which is also based on Faraday's law of electromagnetic induction. When the conductive liquid passes through two electrodes with a distance L at an average flow velocity V and perpendicular to the direction of the magnetic field of force B, a corresponding induced electromotive force (E) is generated between the electrodes, and the formula is:
E=B×L×V

In the formula:

B: the magnetic induction intensity of the excitation coil

V: Average flow velocity

L: The distance between the two electrodes (this machine is 24mm)

QV: The volume flow of the fluid to be measured

The electromagnetic flowmeter converter provides stable excitation current to the electromagnetic flow sensor excitation coil, and the preamplifier amplifies and converts the electromotive force induced by the sensor into a standard current signal or frequency signal, which is convenient for flow display, control and adjustment.