Petroleum PFA Liner JIS Electromagnetic Flow Meter

Best Technology Guide to Magnetic Flow Meters

1. Introduction

1. MLF electromagnetic flowmeter works according to Faraday's law of electromagnetic induction, and is composed of sensors and converters. Used to measure the conductivity of liquid or solid. In general, its conductivity should be greater than 5μs/cm (tap water and raw water conductivity is about 100 ~ 500μs/cm), and it can also be used to measure acid, alkali, brine, pulp or pulp and other media. However, these media cannot contain a large amount of magnetic substances and bubbles.

MLF electromagnetic flowmeter is an instrument for measuring liquid fluidity. Widely used in metallurgy, chemical industry, paper making, environmental protection, petroleum, textile, food, urban management, water plant and other industries.

2.Working Principle

The principle of the sensor is based on Faraday’s law of electromagnetic induction.

It is installed a pair of detection electrodes on the pipe wall,where the measurement pipe axis

and magnetic field lines are vertical. When the conductive liquid cuts magnetic field lines and

produces induced electromagnetic force.Which can be measured by the two electrodes on the

meter pipe.The result can be calculated by formula: Induced electromotive force,(flow signal)

E=KBDV

E——Induced electromotive force,V；

K——meter constant；

B——Magnetic flux density,T；

D——Internal diameter of measuring pipe,m；

V——Average velocity of pipe section,m/s.

1MLF Series Electromagnetic Flow Meter

Assume the volume of liquid as qv(m3/s),qv=πD2V/4),so in the formula E=(4kB/πD)qv=kqv,

K is meter constant,K=4kB/πD.

Actually, the electromagnetic flow meter consists of two parts, transmitter and sensor, the

measuring electrodes inspect the electromotive force, and transmit to the converter, the

converter provides excitation current.

E is usually called a flow signal, after processing the flow signal by converter, output 4~20 mA/

pulse(or frequency) signal which is proportional to the flow rate, then the flow rate recording,

adjusting can be achieved.

3. Quick Details

1) It is high resistance, fast response design can make undistorted collection of weak signal and fast response to the flow changes. Its range rate can reach 100:1.

2) MLF electromagnetic flowmeter is explosion-proof design.

3) Function of low conductivity measurement.

4) There are nine language(Chinese, English, Korean, Polish, Turkish, French and Portuguese languages) options to meet the needs of different customers.

5) It has the function of self-regulation and self-examination.

6) Different outputs are optional: Hart,RS485 Profibus,4-20mA, frequency, pulse.

4. Selection of Liner Material

4. Selection of Electrode Materials

5. Dimensional Sketches

a. Dimension of Converter

Divided Type

Integrated Type

Battery Powered Type

b. Dimension of Sensor

6. Configuration

Melan Measurement & Control Instruments is located in Shanghai City. It is a high-tech manufacturer specialized in the design, development, manufacturing and sale of measurement and control instruments.

Our products are widely used in various fields, including electricity, chemical industry, metallurgy, brewing, oil and gas, textile, water conservancy, environmential protection, etc.

We own independent-courtyard modemized manufacturing workshops and an open office building. Melan has accumlated production and management experience in instruments from European and American and domestic famous companies.

We own first-class talent team, and all the products have reached advanced level at home and abroad. We provide our customers with complete and professional test control solutions and high-tech and high-quality products.

Melan is your reliable friend and partner. We are willing to try our best as dedication and perfection as motivation.

Our Company

Meeting Room

Showroom

Warehouse

Calibration System

Workshop