Overview

Our company’s electromagnetic flowmeters are manufactured in compliance with the Chinese national standard **JG-1033-2007, Electromagnetic Flowmeters**, and are precision instruments designed to measure the volumetric flow rate of conductive media. In addition to providing real-time on-site monitoring and display, these flowmeters can output a standard current signal for recording, adjustment, and control purposes, enabling automated detection and process control. They also support long-distance signal transmission, making them ideal for applications across a wide range of industries—including water supply, chemical processing, coal mining, environmental protection, light textiles, metallurgy, and paper manufacturing—where accurate measurement of conductive liquid flow is essential.

How it works

An electromagnetic flowmeter operates based on Faraday's law of induction, which states that when a conductive object moves through a magnetic field, cutting across the magnetic field lines, an induced electromotive force is generated within the conductor. This induced EMF, E, is given by:

E = KBdV

The flow rate Q is:

Q = 3600 × V × S

Where:

K - Instrument Coefficient

B— Magnetic flux density (T)

D—Electrode spacing (m)

V-First-class fluid average flow velocity (m/s)

S – Cross-sectional area of the catheter (m²)

When measuring flow, a conductive liquid flows at velocity V through a magnetic field oriented perpendicular to the direction of flow. This motion induces a voltage in the conductive liquid that is directly proportional to the average flow velocity. The induced voltage signal is detected by electrodes that are in direct contact with the liquid. For a given flowmeter, since S, B, and d remain constant, the flow rate is directly proportional to the magnitude of the induced electromotive force E (or the flow velocity V).

Product Features

1. The measuring tube contains no moving parts, making maintenance and management easy; and since there are no flow-obstructing components, there is no pressure loss.

2. The minimum conductivity of the liquid to be measured must be ≥30 μS/cm. Combined with various liner materials, this solution is suitable for measuring the flow rate of a wide range of media, including acids, bases, salt solutions, as well as slurries, mineral suspensions, and pulp.

3. The measurement of flow rate is unaffected by changes in the fluid's density, viscosity, temperature, pressure, or electrical conductivity; instead, the sensor detects a voltage signal.

4. Exhibits a linear relationship with the average flow velocity and offers high measurement accuracy.

5. Proper selection of lining and electrode materials can ensure excellent corrosion resistance and wear resistance.

6. Low-frequency rectangular wave excitation ensures stable and reliable operation, free from interference caused by power frequency and various stray noises present on-site.

7. Independent of fluid direction, it can accurately measure flow in both forward and reverse directions.

8. Range ratio of 1:30 (0.5 m/s – 15 m/s), offering a wide full-scale flow velocity range.

9. Chinese character LCD backlit display with online parameter modification, offering simple and convenient operation. 10. Equipped with empty pipe detection and alarm functionality, and capable of adapting to various fluid media.

Complete machine and sensor technical specifications

Product Model and Marking

A 1. Installation Type (*Y - Integrated, *F - Split)

B – Nominal Diameter (mm)

c 1 Nominal pressure (MPa) (*06 = 0.6, *10 = 1.0, *16 = 1.6, *40 = 4.0, *XX for special orders)

D— Lining materials (*1—PTFE (F4), *2—CR rubber, *3—PU, *4—F46, *5—PFA)

E—Electrode Materials (*G—Stainless Steel, *B—Hastelloy B, *C—Hastelloy C, *I—Titanium, *A—Tantalum, *Y—Platinum-Iridium Alloy, *W—Stainless Steel Coated with Tungsten Carbide)

F- Protection Ratings (*1 - IP65, *2 - IP68 + IP65, meaning the sensor is IP68 and the converter is IP65; *3 - IP67 + IP65, meaning the sensor is IP67 and the converter is IP65; *4 - Submersible type, meaning both the sensor and converter are IP68)

G—Explosion-proof marking (*0 - None, *1 - Explosion-proof type)

H—Connection Type (*F-Flange Connection, *S-Screw Connection, *K-Coupling Connection)

I—Power Supply (*1-3.6VDC, *2-24VDC, *3-220VAC, *4-24VDC/220VAC Dual Power Supply)

J-Output Method (*M - Pulse Output, *D - Current Output, *R - RS485, *Q - Full-Function Output, *T - Cooling/Heating Metering)

Electromagnetic Flow Measurement Range Selection Table

Factory display

Honor Show

Exhibition style