Electromagnetic Flow Meter

RBEF Electromagnetic Flow meter(Magmeter) is suitable to measure volumetric flow rate of the conductive liquid and slurry in the closed pipe. e.g. clean water, sewage, various solutions of acid, alkali, salt; slurry, slag, pulp and other liquids such as food-beverage etc. 

 A various type Magnetic Flow meters(Liquid flow meter) can provide as follows:

  •  Standard Electromagnetic flow meters are for most of water and wastewater applications.
  • Wafer Type Ceramic liner Magnetic Flow Meter for Highly resistant Magmeter liner and electrodes that are suitable for most extreme process media, pipe size is from DN25 to DN200.
  • Sanitary Tri -clamp Type Magnetic Flowmeters are designed for the food(milk filling) & beverage and pharmaceutical industries and is available with hygienic and flexible process connections, pipe size is from DN10 to DN150.
  • High frequency Emag flow meter for Slurry and High Percentage of Solids, etc.

 

 

Description

  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download
Principle


Faraday’s law of electromagnetic induction states that an inductive voltage is generated when a conductor moves through a magnetic field. This principle is used as the basis of flow measurement in the RBEF electromagnetic flow meter.  In the electromagnetic flow meter, the flowing fluid corresponds to the moving conductor as described in Farad
ay’s law.

 UE ∞ B * D * v

The induced voltage UE is directly proportional to magnetic field intensity (B), electrode spacing (D) and average fluid velocity (v). Since magnetic field intensity (B) and the electrode spacing (D) are constant values, induced voltage UE is therefore directly proportional to the average flow velocity (v).

Q = (∏ * D2) / 4 * v     therefore    UE ∞ Q

The equation for calculating volumetric flow rate (Q) shows that the induced voltage (UE) is linear and directly proportional to the average velocity (v).  In the  flowmeter transmitter, the induced voltage (UE) from the electrodes is used to calculate volumetric flow rate (Q) based upon the pipe’s internal diameter.

UE = Induced voltage

B = Magnetic field strength

D = Electrode spacing

V = Fluid velocity

Q = Instantaneous volumetric flow rate


Features

RBEF Magmeter ((Liquid Magnetic flow meter)) Features:

  • A wide range of meter sizes, from DN10 - DN3000 (½” - 120”) to tackle any application
  • Compact and Remote type;
  • Standard 0.5% accuracy, 0.2% accuracy for optional
  • Measure clean liquids as well as mixtures of solids and liquids with conductivity as low as 5 μS/cm;
  • Totalizers for positive, negative, and net flow
  • No moving parts to wear and tear 
  • Short straight-pipe run required, thus, suitable for any desired installation location
  •  Plug and play. All parameters are pre-configured in factory
  • No pressure loss
  • Special function: IR Remote, Power off timer, Cumulative hours, Relay Output
  • Rich communication outputs: 4-20mA, Pulse, RS485/232, Optional Modbus, HART, Profibus and GPRS/GSM communication interface
  • Self-diagnosing capability to minimize operational downtime
Specification

RBEF Main powered Magnetic Flow meter Specifications

Sizes

Flanged (Metric)

DN15…DN3000

Flanged (US)

1/2”…118”

Wafer Design

DN15…DN100

Nominal Pressure

GB,JIS and DIN Flange

0.6 MPa, 1.0 MPa, 1.6 MPa, 4.0 MPa

ANSI Flange

Class 150, Class 300

Wafer Design

1.6 MPa, 4.0 MPa

For additional pressure requirements, please contact manufacturer

Accuracy (pulse output)

Standard

±0.5%   (0.6m/sec to 12 m/sec)

Optional

±0.2%   (1.0m/sec to 12 m/sec)

Measurement Resolution

±1mm/sec

Max Flow Tube Velocity

SI:

49 ft/s

US:

12 m/s

Ambient Temperature

-25…+55°C   /   -13…+131°F

Relative Humidity

5%…90%

Conductivity

≥5 μS/cm

Transmitter Mounting Availability

Compact type

Sizes:     DN15…DN1000

       1/2”…40”

Remote type

Sizes:     DN15…DN3000

       1/2”…118”

Note 1: Cable between flow tube and remote transmitter is type SMFE100

Note 2: Remote unit supplied with 10m cable as standard

Note 3: Max cable length is 200m (650ft)

 

Material

SI

US

Liner Material Options

Neoprene (std)

DN15…DN3000

1/2”…118”

PTFE

DN15…DN1000

1/2”…40”

Polyurethane

DN15…DN300

1/2”…12”

PFA

DN15…DN250

1/2”…10”

PFA with optional wire reinforcement

DN80…DN250

3”…10”

Tefzel

DN15…DN250

1/2”…10”

Tefzel with optional wire reinforcement

DN80…DN250

3”…10”

 

ceramic liner and electrodes

DN15…DN200

1/2”…8”

Electrode Material Options

316L stainless steel (std)

DN15…DN3000

1/2”…118”

Hastelloy – C22

DN15…DN1000

1/2”…40”

Hastelloy – B10

DN15…DN1000

1/2”…40”

Titanium

DN15…DN250

1/2”…10”

Tantalum

DN15…DN250

1/2”…10”

Platinum/iridium Alloy

DN15…DN250

1/2”…10”

316L with tungsten carbide coating

DN15…DN600

1/2”…24”

Grounding Options

Flange Grounding

DN15…DN3000

1/2”…56”

Grounding Ring

DN15…DN250

1/2”…10”

Electrode Grounding

DN50…DN3000

2”…118”

Inlet protection ring

DN50…DN300

2”…12”

 

Type

Liner

Standard

Optional

Max Process Temperature Limits

Compact

Neoprene

80°C / 176°F

120°C / 248°F

PTFE

80°C / 176°F

120°C / 248°F

Polyurethane

80°C / 176°F

-

PFA

80°C / 176°F

120°C / 248°F

Tefzel

80°C / 176°F

-

Remote

Neoprene

80°C / 176°F

120°C / 248°F

PTFE

80°C / 176°F

120°C / 248°F

180°C / 356°F

Polyurethane

80°C / 176°F

-

PFA

80°C / 176°F

120°C / 248°F

Tefzel

80°C / 176°F

-

Environmental Protection Class

Compact

IP 65

IP67

Remote

IP 65

IP 68

Power Supply Options

85…265VAC / 45…63Hz, 20VA

16…36VDC, 16VA

Display

2 or 3 line backlit LCD

Configuration Access

Front panel keypad

Hand held infrared remote control (optional)

Output Signals

Active analog current output

Max load resistance    0…1.5kΩ for 0…10mA

                     0…750Ω for 4…20mA

Accuracy = same as pulse output ±0.1% of rate

Option: HART Protocol

Passive analog current output

Requires 24Vdc external supply to operate

Accuracy = same as pulse output ±0.1% of rate

Pulse / frequency and alarm outputs

Optically isolated open collector output powered either internally or externally

  Int. power:       28VDC with 1.2kΩ pull-up resistor

  Ext. power:       ≤36VDC, max current 250mA

Digital Communications

RS485 Modbus

GPRS (superimposed on current output)

All interfaces have built in lightning protection

Electrical isolation

Isolation between all I/O and input power no less than 500V

Isolation between all I/O and ground no less than 500V

Isolation between flow tube and transmitter outputs no less than 500V

Standard

JB/T 9248-1999 Electromagnetic Flowmeter

Model Selection

Model RBEF Electromagnetic Flow Meter Ordering Code

RBEF-

DN

-

 

-

 

-

 

-

 

-

 

-

 

-

 

-

 

-

 

-

 

-

 

-

 

-

 

 

 

 

1

 

2

 

3

 

4

 

5

 

6

 

7

 

8

 

9

 

10

 

11

 

12

 

13

 

14

15

16


1 Nominal Diameter(mm)/ [inches] (1)

0015 [½”]

0100 [4”]

0450 [18”]

1400 [56”]

0020 [¾”]

0125 [5”]

0500 [20”]

1600

0025 [1”]

0150 [6”]

0600 [24”]

1800

0032 [1¼]

0200 [8”]

0700 [28”]

2000

0040 [1½]

0250 [10”]

0800 [32”]

2200

0050 [2”]

0300 [12”]

0900 [36”]

2400

0065 [2½]

0350 [14”]

1000 [40”]

2600

0080 [3”]

0400 [16”]

1200 [48”]

3000

 

 

 

 

 

2 Flange Rating (1)

02

0.25 MPa

1600 … 3000

06

0.6 MPa 

700 … 3000

10

1.0 MPa 

200 … 1400

16

1.6 MPa 

15 … 600

20

ANSI Class 150

15 …1400

40

4.0 MPa 

15 … 150

50

ANSI Class 300

15 … 1400

AA

Special

 

 

 

 

 

3 Electrode Material

1

316L Stainless Steel

3

Hastelloy C-22

4

Hastelloy B-10

5

Titanium

6

Tantalum

7

Platinum / Iridium Alloy

8

Tungsten Coated Stainless Steel

9

ceramic

 

 

 

4 Lining Material

1

Neoprene (Hard rubber)

≤ 3000

2

PTFE

≤ 1000

3

Polyurethane

≤ 300

4

PFA

≤ 250

5

Tefzel

≤ 250

6

PFA with Wire Net

80 … 250

7

Tefzel with Wire Net

80 … 250 

8

Ceramic

15 … 200

 

 

 

 

5 Grounding and Lining Protection

0

Flange ground

15 … 3000

1

Earth ring

15 … 250

 2

Ground electrode

50 … 3000

3

Inlet protection ring

50 … 3000

 

 

 

 

6 Max. Process Temperature

A

80°C

All Linings

B

120°C

Neoprene / PTFE / PFA / Tefzel

C

180°C

PTFE only

 

 

7 Environmental Protection Class

1

IP65

2

IP67 (Compact Type Only)

3

IP68 (Remote Type Only)

 

 

8 Explosion Proofing

1

None

2

Ex DE IIC T6

 

 

 

9 Configuration – sensor/transmitter 

1

Compact (15 … 1000)

2-X

Remote (with Xm cable, standard: 10m)(2)

 

 

 

10 Power Supply

A

AC: 85 … 265 VAC / 45 … 63Hz

D

DC: 18 … 36 VDC

 

 

 

11 Display and Programming

2

2 line LCD display + keypad programming

3

3 line LCD display + keypad programming

 

 

 

12 Output and Input

0

Basic Configuration (current, pulse and contact outputs)

1

Basic Configuration + RS485(MODBUS)

2

Basic Configuration + GPRS

3

Relay

4

Hart

5

PROFIBUS-DP

 

 

 

 

13 Calibration Specification

1

3 point, 0.5% accuracy

2

3 point, 0.25% accuracy

3

Special

 

 

 

14 Flow Tube Configuration

 

Flange Type

15 … 3000

D

DIN

 

A

ANSI

 

J

JIS

 

2

Wafer

 

3

Tri-clamp

1.5 -200

O

Others(pls clarify)

 

4

Flange type with removable electrodes

15 … 3000

 

15 Body + Flange material

 

C

Carbon Steel

 

S

304 Stainless Steel

 

 

 

16 Special Function

0

No

R

IR Remote

T

Power off timer

H

Cumulative hours

Q

Quantitative control

J

Relay Output

 Remark:

(1) Line size selection will be inches for ANSI Class 150/300 rating selection, DIN size for all other ratings

(2) Order longer cable length separately

(3) Ceramic liner and electrodes is with wafer  and flange type only

Applicants

The RBEF Electromagnetic flow meter (Emag. meters) range is designed to measure the volumetric flow of conductive liquids and slurries within closed pipelines in industries such as water & wastewater, chemical, petroleum, metal production, power, pharmaceutical, food & beverage, pulp & paper, etc. 

The RBEF Emag flow meter is the ideal instrument for :

  • Measuring and billing in civil, industrial and agricultural sector;
  • For flow measurement and control in residual water treatment.
  • Water flow, sludge monitoring
  •  Chemicals, acids, alkalis fluids; Paint industry
  • Viscous fluids and slurries
  • Water & wastewater flows
  • Irrigation meters of Agriculture
  • Leakage Detection 
  • Pulp and slurries
  • Food and Beverage and pharmaceutical industries

Note: The minimum conductivity of the measured flow must be ≥ 5μS/cm for the meter to function correctly.

RBEF Electromagnetic Flowmeter Application Worksheet

RBEF

Flow meter Application Worksheet

(Electromagnetic flow meter)

Customer Name

 

Contact

 

Tel/Fax/Email

 

Project Name

 

 

Tag.No

 

 

 

Process Parameters

Pipe Spec / Material

 

 

Process Connection

 

 

Fluid Type

 

 

Max Flow 

 

 

Nor. Flow 

 

 

Min. Flow 

 

 

Fluid Temperature

 

 

Operating Pressure

 

 

Measuring range

 

 

Power Supply

85 --- 265 VAC or 16 --- 36 VDC

 

Accuracy % required

( ±0.5 or ±0.2 )

 

 

Manufacturers Configuration Sheet

Nominal Diameter mm

 

 

Nominal pressure  MPa

 

 

Electrode Material

 

 

Lining Material

 

 

Grounding/

Protection

 

 

Temperature Rating

 

 

IP Protection Class

 

 

EX Certification

 

 

Configuration

Compact or Remote

 

Power Supply

85 --- 265 VAC or 16 --- 36 VDC

 

Programming Display

 

 

Input/output signal

 

 

Inspection

 

 

Connection type

 

 

Electric connection

 

 

Special signal cable

 

 

Mating Flange Set

 

 

Accessory 1

 

 

Accessory 2

 

 

Model Number

RBEF-

 

Remark

 

 

 

 

Download

Catalog - Electromagnetic flow meter

Manual - Magnetic flow meter

Other files

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