Xiyi Electromagnetic Flowmeter

★ No moving parts inside the measuring tube, easy to maintain and manage; no flow-blocking components, hence no pressure loss.
★ The measured liquid conductivity ≥5μs/cm, combined with various lining materials, suitable for measuring the flow of various acid, alkali, salt solutions, as well as media such as slurry, ore pulp, and paper pulp.
★ Flow measurement is unaffected by changes in fluid density, viscosity, temperature, pressure, and conductivity. The sensor's induced voltage signal has a linear relationship with the average flow velocity, ensuring high measurement accuracy.
★ Proper selection of lining and electrode materials ensures excellent corrosion and wear resistance.
★ Low-frequency rectangular wave excitation, immune to power frequency and various on-site stray interferences, ensuring stable and reliable operation.
★ Unaffected by fluid direction, accurate measurement in both forward and reverse flows.
★ Range ratio of 1:120 (0.1m/s to 12m/s), with a wide full-scale flow velocity range.
★ Chinese character LCD backlight display, allowing online parameter modification, simple and convenient operation.
★ Features empty pipe measurement, ** function, and adaptability to different fluid media.
★ Power-off time recording function, automatically records the power interruption time of the instrument system, and compensates for unmeasured flow.

★ Hourly total recording function, records the total flow volume on an hourly basis, suitable for time-of-use metering systems.

Product Introduction / INTRODUCTION

The electromagnetic flowmeter complies with the standard JB/T9248-2015 "Electromagnetic Flowmeter" and is an inductive instrument for measuring the volumetric flow of conductive media. While providing on-site monitoring and display, it can output standard current signals for recording, regulation, and control, enabling automated detection and control, as well as remote signal transmission. It is widely used in industries such as water supply, chemical, coal, environmental protection, light textile, metallurgy, and papermaking for flow measurement of conductive liquids. It has obtained the explosion-proof certification issued by the National Quality Inspection Center for Explosion-proof Electrical Products, with the explosion-proof mark EXD11CT6, suitable for liquid measurement in various ** environments.

Working Principle / WORKING PRINCIPLE

Based on Faraday's law of electromagnetic induction, a pair of detection electrodes are installed on the pipe wall perpendicular to the measuring tube axis and the magnetic field lines. When conductive liquid flows along the measuring tube axis, it cuts the magnetic field lines, generating an induced potential. This induced potential is detected by the two electrodes, and its magnitude is proportional to the flow rate, given by:
E=KBVD

Where:
E－Induced potential;
K－Coefficient related to magnetic field distribution and axial length;
B－Magnetic induction intensity;
V－Average flow velocity of conductive liquid;
D－Electrode spacing (internal diameter of the measuring tube)

The sensor transmits the induced potential E as a flow signal to the converter, which, after amplification, transformation, filtering, and a series of digital processing, displays the instantaneous flow and cumulative flow on a backlit dot-matrix LCD. The converter provides 4–20mA output, ** output, and frequency output, and is equipped with communication interfaces such as RS-485, supporting HART and MODBUS protocols.

Product Advantages/ PRODUCT ADVANTAGES

1、The electromagnetic flowmeter sensor has a simple structure, with no moving parts or any flow-obstructing components in the measuring tube;

2、Capable of measuring dirty media, corrosive media, and suspended solid-liquid two-phase flows;

3、The measurement process is unaffected by the temperature, viscosity, density, or conductivity (within a certain range) of the measured medium;

4、The output of the electromagnetic flowmeter is only proportional to the average flow velocity of the measured medium and is independent of the flow state (laminar or turbulent) under symmetric distribution;

5、The electromagnetic flowmeter has no mechanical inertia, responds sensitively, can measure instantaneous pulsating flow, and can also measure flow in both forward and reverse directions;

6、Wide range of nominal diameter options for industrial electromagnetic flowmeters.

Technical Parameters / TECHNICAL PARAMETERS

Ordering requires: Installation method, dimensions, medium, pressure, temperature

Application Fields / APPLICATION FIELD: Electromagnetic flowmeters are used in industries such as petroleum, chemical, steel, food, power, papermaking, metallurgy, water supply and drainage, petrochemical, and medical.

Installation Precautions/ INSTALLATION PRECAUTIONS

1、Install in a location free from vibration and strong electromagnetic fields (e.g., away from large motors and frequency converters);
2、Preferably install vertically; if installing horizontally, place at a low point, not at the pipeline's highest point, to ensure full pipe and prevent air bubbles;
3、Straight pipe requirements: ideally, ensure 10 times the pipe diameter upstream and 5 times downstream;
4、When installing welded types, avoid welding while connected to the instrument to prevent damage to the flowmeter;
5、Ground the外壳 as much as possible; shield wires should be grounded at one end, and the grounding point should not be shared with strong electrical systems;
6、For easy maintenance, choose an installation location that meets maintenance requirements. Additionally, install a bypass pipe so fluid can flow through it during faults;
7、Avoid direct sunlight and high-temperature areas; ensure waterproof and moisture-proof treatment;
8、Other considerations: signal wiring should not run alongside strong electrical lines.