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.
| Product |
Explosion-Proof Electromagnetic Flowmeter |
| Model |
SUP-LDG-A100D |
| Measured variable |
Direct measured variables: Flow velocity
Calculated measured variables: Volume flow, mass flow. |
| Velocity of flow |
Typically Velocity of flow: 0.5m/s~5m/s |
| Flow range |
0.32m³/h~1270m³/h |
| Nominal diameter |
DN15~DN300 |
| Range ratio |
10:1 |
| Ex symbol |
Ex db ib IIC T6...T4 Gb |
| Current output |
(4~20)mA, 24VDC,≤750Ω |
| Pulse output |
Fmax ≤ 5000 cp/s
Output pulse width: 0.1ms~2000ms
( This value is lower than the maximum duty cycle, with a maximum duty cycle of 1:1 Fmax ≤ 5000 cp/s ) |
| Communications |
RS485, MODBUS-RTU, Hart (optional) |
| Supply voltage |
100VAC~230VAC，50/60Hz；
20VDC~28VDC |
| Power consumption |
≤15W |
| Cable entries |
M20*1.5 or NPT1/2 |
| Accuracy |
Measurement value±0.5%(Flow velocity 0.5m/s~5m/s) |
| Repetitiveness |
0.16％ |
| Conductivity |
≥50μS/cm |
| Pressure rating |
DN15~DN250：PN<1.6MPa
DN300: PN<1.0MPa
(High pressure can be customized) |
| Ambient temperature |
-10℃~55℃ |
| Storage temperature |
-20℃~55℃ |
| Ingress protection |
IP65 |
The operating principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The two electromagnetic coils at the upper and lower ends as shown in Figure 3 generate a constant or alternating magnetic field. When the conductive medium flows through the electromagnetic flowmeter, the induced electromotive force can be detected between the left and right electrodes on the wall of the flowmeter tube. The magnitude of the induced electromotive force is proportional to the electrically conductive medium flow rate, the magnetic induction density of the magnetic field, and the width of the conductor (the inner diameter of the flowmeter measuring tube), and the flow rate of the medium can be obtained by calculation. The induced electromotive force equation is as follows:
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
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Features
- Explosion-Proof Certification: Passed various universal explosion-proof (Ex) certifications.
- Measurement Reliability: Reliable measurement, high accuracy, and good stability.
- Integrated Design: Integrated structure, no moving parts, easy to install, maintenance-free.
- Communication Interface: RS485 communication interface - standard Modbus RTU protocol.
- Excitation Technology: Adopting advanced low-frequency square wave excitation, zero point stability, strong anti-interference ability, and reliable operation.
- Bidirectional Measurement: It is not affected by the direction of the fluid and can be accurately measuredin both directions.
- Touch Operation: Touch the button, no need to open the lid.
- Display Orientation: The orientation of the header/display interface can be adjusted for easy reading.
- Multi-Language Support: Supporting five languages and free switching: Chinese, English, Korean, Russian and Spanish.
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Automatic calibration line
