FMX470 Explosion-proof Electromagnetic Flow Meter

The electromagnetic flowmeter is designed based on the Faraday electromagnetic induction principle and used to measure the instantaneous flow rate of conductive liquids in enclosed pipelines in flammable and explosive environments. During on-site monitoring and display, standard current signals, pulse signals, and RS485 digital signals can be output for recording, adjustment, and control, achieving automatic detection and control. It can be widely used in industries such as tap water, chemical industry, coal, environmental protection, light textile, metallurgy, papermaking, etc.

Characteristics

Accuracy: Measurement value±0.5%(Flow velocity 0.5m/s~5m/s)

Direct measured variables ：Flow velocity

Calculated measured variables ：Volume flow , mass flow

Velocity of flow：Typically Velocity of flow：0.5m/s~5m/s

Terminals：Screw type terminal block, maximum wire diameter 2.5mm²

Note: The product is a flameproof intrinsic safety composite explosion-proof type. The product header is designed with explosion-proof structure, the sensor measuring electrode part is designed with intrinsic safety, and the intrinsic safety circuit is an internal circuit with no external output.

Introduction

Specification

Product	Electromagnetic flowmeter
Model	FMX470
Diameter nominal	DN15~DN300
Nominal pressure	DN15 - DN250, PN ≤1.6MPa
Nominal pressure	DN300, PN ≤1.0MPa
Accuracy	Measurement value ±0.5%(Flow velocity 0.5m/s~5m/s)
Repetitiveness	0.16%
Liner material	Polyurethane (PU), PTFE (F4),Chloroprene(CR)
Electrode material	316L Stainless Steel, Hastelloy C, Hastelloy B, Ti, Ta, Pt
Medium temperature	Polyurethane: -10…+60℃ ;PTFE/FEP: -10…+120℃;Chloroprene: -10…+70℃
Power supply	100VAC~230VAC,50/60Hz；20VDC~28VDC
Structure type	Compact type
Ingress protection	IP65
Ex symbol	Ex db ib IIC T6...T4 Gb

Measuring principle

Mag meter works based on Faraday's law, when the liquid goes through the pipe at the flow rate of v with a diameter D, within which a magnetic flux density of B is created by an exciting coil, the following electromotive E is generated in proportion to flow speed v:

E=K×B×V×D

Where:
E－Induced electromotive force
K－Meter constant
B－Magnetic induction density
V－Average flow speed in cross-section of measuring tube
D－Inner diameter of measuring tube

flowmeter principle

Features
Passed various universal explosion-proof (Ex) certifications.
Reliable measurement, high accuracy, and good stability.
Integrated structure, no moving parts, easy to install, maintenance free.
RS485 communication interface - standard Modbus RTU protocol.
It is not affected by the direction of the fluid and can be accurately measured in both directions.
Adopting advanced low-frequency square wave excitation, zero point stability, strong anti-interference ability, and reliable operation.
Touch the button, no need to open the lid operation.
The orientation of the header/display interface can be adjusted for easy reading.
Built in bilingual Chinese and English, allowing for free switching.