digital remote 10 inch DN250 electromagnetic chilled water flow meter electromagnetic flow meter
Electromagnetic flow meter working principle
Faraday’s Laws of induction form the basis for the magnetic water flow meter which states that a voltage is generated in a conductor as it moves through a magnetic field.
This principle is applied to a conductive fluid which flows through the meter tube perpendicular to the direction of the magnetic field (see Schematic).
UE ~ B · D ·V
The voltage induced in the fluid is measured by two electrodes located diametrically opposite to each other.
This signal voltage UE is proportional to the magnetic induction B, the electrode spacing D and the average flow velocity v. Noting that the magnetic induction B and the electrode spacing D are constant values indicates that a proportionality exists between the signal voltage EU and the average flow velocity v. From the equation for calculating the volume flowrate* )UE ~ qv, it follows that the signal voltage is linear and proportional to the volumetric flowrate.
Main Features
1). With simple structure ,the flow meter is of high reliability.
2). The wide range of the nominal bore is suitable for all the pipe size between DN2 and DN2000.
3). Measurement is independent of fluid density ,viscosity ,humidity ,temperature pressure and conductivity.
4). The sensor with advanced processing technology and liquid airproof is of long natural life and of nice resistance to shaking leakage.It guarantees the instrument good precision and stability .
Technical specifications of electromagnetic flow meter
|
Item |
The Specifications of electromagnetic flowmeter |
|
Installation Type |
Split/remote, integrated/compact |
|
Measuring fluid |
conductive fluid and slurry |
|
Caliber |
DN6-DN3000 |
|
End connection |
Flange, threaded, clamping, insertion type, etc. |
|
Electrode materials |
Mo2Ti HC HB Pt Ta Ti |
|
Flange standard |
GB, DIN, JIS, EN, SABS, etc. |
|
Lining Material |
PTFE, PFA (resistance to negative pressure), chloroprene rubber, polyurethane, hard rubber (optional conductive ground rubber), F46 |
|
Electrode Type |
Standard type 316L, scraper-type (DN ≥ 50) |
|
Dielectric conductivity |
> 5μs/cm (water> 20μs/cm) |
|
Accuracy grade |
±0.5% RS. |
|
Flow Range |
0-10m/s |
|
Maximum temperature of medium |
For rubber liner ≤ 80 °C, for PTFE liner ≤ 120°C |
|
Ambient temperature |
-20 - +60 |
|
Working pressure |
0.6Mpa-4.0Mpa, the special high rpressure is available |
|
Protection Level |
IP65, IP67, IP68 (optional) |
|
Power |
220VAC(85~250 voltage) 24VDC(11~40 voltage) |
|
Display |
Forward and backward instantaneous flowrate, total flow, velocity, flowrate percentage with back light |
|
Output |
4-20mA current output ,0-1kHz frequency output, pulse output per unit volume |
|
Communication |
RS485 @Modbus, RS232@Modbus, HART, Profibus, GPRS, etc. |
Kaifeng Hollysys Industrial Instrument Co., Ltd. is a high-tech enterprise commit into research and development, manufacture of flow instruments. Located at the base of China flow instrument, Kaifeng, we have full access to gain the most advanced technology in field. All these make us full of confidence to provide products with international standard.
For Before-sales advise
In order to recommend you the most suitable our electromagnetic sensor , please show us following necessary information according to your practical situation.
1.What is your measuring medium ? Conductive liquid or slurry
2.Working pipe size? 10-3000mm
3.Install type? Flange ,Inserted,Threaded, Clamped.
4.Electrode material? SS316,HB,HC,Ta,Ti,Pt
5.Liner material?PTFE,rubber,neoprene,FEP,PFA,polyrethane
6.Communication mode? RS485, Modbus, RS232 ,Modbus, HART, Profibus, GPRS, others
After-sales service
We promise to deliver the following after-sales service:
1.Warranty: The warranty period is 12 months starting from the shipping date;
2. Customers will enjoy free repair services for failures found within the warranty due to manufacturing quality;
3. For on-site services not arising from manufacturing quality, we shall charge a certain service fee at our discretion based on actual charges incurred such as travel expense;
4. We provide paid repair services for meter damages not arising from manufacturing quality issues or meter damages not within the scope of warranty.
1.How do you calibrate the flowmeter?
We use the reference standard flowmeter method to calibrate the 0.5%R flowmeters.We use the Gravimetric for the 0.2% R flowmeters.
2.How many years do you use the calibration ?
we use it since our factory starts.
3. How to lift, move electromagnetic flow meter?
4. How to ensure electromagnetic flow meter earthing grounding?
5. Electromagnetic flow meter upstream and downstream requirements
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