The RBEF-I Insertion Electromagnetic flow meter（Emag meters） can be installed in any pipeline of internal diameter from 50mm (2in) to 8000mm (360in) through a small tapping.
The RBEF flow meters are ideal for use in process measurement and control, survey, leak detection, etc. applications such as leakage monitoring, and network analysis and in permanent locations where cost or space limitations preclude the use of conventional closed pipe meters.
Principle of Operation
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-I electromagnetic flow meter. In the electromagnetic flow meter, the flowing fluid corresponds to the moving conductor as described in Faraday’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 flow meter 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 Fig. 1 The Principle of Insertion Flowmeter
D = Electrode spacing
V = Fluid velocity
Q = Instantaneous volumetric flow rate
The RBEF-I Insertion Magnetic flow meter（Emag meters）consists of insertion probe and converter.
The RBEF-I has two models: Fixed-length model and Pluggable model.
1. Fixed-length model Insertion Magnetic flow meter
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Pipe Size |
Insertion Depth（D=pipe inner diameter) |
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DN50~DN150 |
(1/8)*D |
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DN200~DN600 |
(1/8)*D or (1/2)*D |
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DN700~DN8000 |
(1/8)*D |
2. Pluggable Model Insertion Magnetic flow meter
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Model |
Probe Length (mm) |
DN Size |
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Insertion Depth （1/8）*D |
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RBEF-I-B-500 |
500 |
DN50 ~ DN1600 |
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RBEF-I-B-900 |
900 |
DN450 ~ DN4800 |
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RBEF-I-B-1200 |
1200 |
DN1400 ~ DN7200 |
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BEF-I-B-1500 |
1500 |
DN2000 ~ DN8000 |
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Fig.3A Pluggable Model |
Fig.3B NPT G1.5” Connection |
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The RBEF tube is made from stainless steel or titanium and its outer diameter is Ф27mm. The probe is made from stainless steel or titanium and PEEK and its outer diameter is Ф34mm. For the pluggable model, the connection between the probe and the pipeline is made through G screw or DN40 flange.
Insertion Electromagnetic flow meter（Emag meters）
1. Suitable for pipeline size from DN50~DN8000mm；
Probe Insertion Depth Table
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Pipeline Size |
Probe Insertion Depth（D=Pipeline Inner Diameter） |
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DN50~DN150 |
(1/8)*D |
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DN200~DN600 |
(1/8)*D or (1/2)*D |
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DN700~DN8000 |
(1/8)*D |
2. Velocity range: 0.1~1m/s or 0.1~10m/s, span can be setup from 0.5m/s~10m/s.
3. Accuracy: velocity v≥1m/s, the accuracy is ±1.5%;
velocity 0.1m/s<v<1m/s, the accuracy is ±3%.
4. Liquid conductivity: >20μs/cm
5. Working pressure: 0.6MPa, 1.0MPa, 1.6MPa, 2.5MPa, 4.0MPa
6. Electrodes: SS316L，HC-22，HB3，Ti
7. Probe Material：SS304，SS316L, Ti (PEEK)
8. Maximum Liquid Temperature: PEEK 120℃
9. Enclosure IP: IP65、IP67，IP68 for remote type only
10. Maximum Cable Length: 100m (10m cable supplied if not specifically ordered)
11. Output Signal: 4~20mA, load: 0~500Ω;
Pulse: 1~5KHz, load: 250~1.2kΩ;
Communications: RS232C、RS485、MODBUS etc.
12． Other specifications refer to RBMAG converter manual.
The RBEF-I Insertion type Magnetic flow meter Model Selection
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RBEF-I |
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□□ |
□ |
□ |
□ |
□ |
□ |
□ |
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[1] |
[2] |
[3] |
[4] |
[5] |
[6] |
[7] |
[8] |
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[1] |
Pipe Size(mm) |
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[7] |
Protection Class |
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050 |
350 |
102 |
262 |
1 |
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065 |
400 |
122 |
282 |
2 |
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080 |
450 |
142 |
302 |
3 |
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100 |
500 |
162 |
402 |
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125 |
600 |
182 |
502 |
[8] |
Explosion Proofing |
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150 |
700 |
202 |
602 |
1 |
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200 |
800 |
222 |
702 |
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300 |
900 |
242 |
802 |
[9] |
Configuration-Sensor/Transmitter |
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Sample：150 = DN150；122 = DN1200 |
C |
Compact (only DN50 --- DN1000) |
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The Insertion type electromagnetic flow meter is a cost-saving and space-saving solution for most cases in which the velocity of liquid are needed, such as water piping, flow switch, leakage detection, network analysis, open channel measurement, etc.
Catalog- Insertion Magnetic flow meter
Manual- Insertion Magnetic flow meter
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