TriCover And ANSI Flanges Magnetic Water Flow Meter With DN200mm
1.Working Principle
The principle of the sensor is based on Faraday’s law of
electromagnetic induction.It is installed a pair of detection
electrodes on the pipe wall,where the measurement pipe axis and
magnetic field lines are vertical. When the conductive liquid cuts
magnetic field lines and produces induced electromagnetic
force.Which can be measured by the two electrodes on the meter
pipe.The result can be calculated by formula: Induced electromotive
force,(flow signal)E=KBDV
E——Induced electromotive force,V；
K——meter constant；
B——Magnetic flux density,T；
D——Internal diameter of measuring pipe,m；
V——Average velocity of pipe section,m/s.
MLF Series Electromagnetic Flow Meter
Assume the volume of liquid as qv(m3/s),qv=πD2V/4),so in the
formula E=(4kB/πD)qv=kqv,K is meter constant,K=4kB/πD.
Actually, the electromagnetic flow meter consists of two parts,
transmitter and sensor, the measuring electrodes inspect the
electromotive force, and transmit to the converter, the converter
provides excitation current.E is usually called a flow signal,
after processing the flow signal by converter, output 4~20
mA/pulse(or frequency) signal which is proportional to the flow
rate, then the flow rate recording,adjusting can be achieved.
2. Quick Details
MLF electromagnetic flowmeter is explosion-proof design.
Function of low conductivity measurement.
There are nine languages options to meet the needs of different customers.
It has the function of self-regulation and self-examination.
Different outputs are optional: Hart,RS485 Profibus,4-20mA, frequency, pulse.
3. Specification
| MLF Type | Divided Type | Integrated Type | Explosive Proof Integrated Type | Battery Powered Type | Heat Energy Type |
| Accuracy | ±0.2% or ±0.5% |
| Pipeline Diameter | DN10-DN2000 | DN10-DN600 | DN25-DN2000 |
| Flange | GB, ANSI, JIS, BS, Others |
| Pressure | DN10-DN600 1.0 1.6 2.5 4.0MPa |
| DN700-DN2000 0.6 1.0 1.6MPa |
| Liner Material | CR, PTFE, PU, Hard Rubber, PFA, FEP(F46) |
| Conductivity | ≥5µs/cm(Please contact us if it is less than 5µs/cm) |
| Electrode | 316L SS, Hb, Ta, Ti, Hc, Tungsten Carbide, Others |
| Protection Class | IP65, IP66, IP67, IP68 |
| Medium Temperature | -25~180℃
(Please refer to liner material) | -25~80℃(Please refer to liner material) | -25~180℃
(Please refer to liner material) |
| Ambient Temperature for Accuracy Influence | <±0.1%/10℃ or <±0.25%/10℃ at the ambient temperature of -25~60℃ |
| Repetability | ≤±0.1% or ±0.25% |
| Analog Output Error | ≤±0.02mA |
| Velocity | 0.3~10m/s |
| Electrical connection | M20x1.5 Seal Cartridge, GB1/2, NPT1/2 |
| Output | 4-20mA, Pulse, RS485, Hart, Profibus |
4. Selection of Liner Material
| Liner Material | Main Performance | Application |
| PTFE | 1. Have the most stable chemical properties in plastic and
resistance to boiling hydrochlor and sulfuric acid, nitric acid
aqua regia, strong alkali, and all kinds of organic solvents, but
can not resist the corrosion of chlorine trifluoride, high
temperature nitrogen trifluoride, liquid fluorine, liquid oxygen
and ozone. 2. Low abrasion resistance. 3. Low negative pressure resistance | 1. -25~140℃ 2. Strong corrosion medium, like strong acid and alkali 3. Healthcare medium |
| CR | Oil proof, solvent resistance, oxidatite resistance and the
resistance to the erosion of common medium like acid, alkali, salt,
etc. | 1. ＜80℃ 2. Be able to measure sewage and mud |
| PU | 1. Very good abrasive resistance, flexibility. 2. Low acid and alkali resistance. | 1. ＜65℃ 2. Neutral strong abrasion resistance medium |
| Hard Rubber | 1 Resistance to room temperature, hydrochloric acid, acetic acid,
oxalic acid, ammonia, phosphoric acid and 50% sulfuric acid, sodium
hydroxide and potassium hydroxide 2 Avoid strong oxidants | 1. ＜80℃ 2. General acid, alkali, salt solution |
| PFA | 1. Can be used for most corrosive medium like acides, alkalis, and
strong oxidant. 2. High material strength, resistance to aging, better than PTFE,
EFP in high temperature 3. Injection molding for higher negative pressure | 1. 40~180℃ 2. Strong corrosion medium, like strong acid and alkali 3. Healthcare mdium |
| FEP(F46) | 1. Hydrophobicity and non-viscous 2. Corrosion resistance is inferior to PFA 3. Negative pressure | 1. 40~180℃ 2. Strong corrosion medium, like strong acid and alkali 3. Healthcare mdium |
5. Dimensional Sketches
a. Dimension of Converter
Divided Type
Integrated Type
Battery Powered Type
b. Dimension of Sensor
| Pipeline Diameter | Dimension |
| L | W | H |
| 15 | 160 | 95 | 130 |
| 20 | 160 | 105 | 137 |
| 25 | 160 | 115 | 150 |
| 32 | 160 | 135 | 160 |
| 40 | 200 | 145 | 175 |
| 50 | 200 | 160 | 185 |
| 65 | 200 | 180 | 205 |
| 80 | 200 | 195 | 215 |
| 100 | 250 | 215 | 235 |
| 125 | 250 | 245 | 275 |
| 150 | 300 | 280 | 300 |
| 200 | 350 | 335 | 355 |
| 250 | 400 | 400 | 405 |
| 300 | 500 | 455 | 460 |
| 350 | 500 | 515 | 520 |
| 400 | 600 | 575 | 580 |
| 450 | 600 | 635 | 630 |
| 500 | 600 | 710 | 685 |
| 600 | 600 | 835 | 795 |
| 700 | 700 | 905 | 910 |
| 800 | 800 | 1020 | 1030 |
| 900 | 900 | 1120 | 1120 |
| 1000 | 1000 | 1245 | 1250 |
| 1200 | 1200 | 1465 | 1470 |
6.Company Profile
Melan Measurement & Control Instruments is located in Shanghai
City. It is a high-tech manufacturer specialized in the design,
development, manufacturing and sale of measurement and control
instruments.
Our products are widely used in various fields, including
electricity, chemical industry, metallurgy, brewing, oil and gas,
textile, water conservancy, environmential protection, etc.
We own independent-courtyard modemized manufacturing workshops and
an open office building. Melan has accumlated production and
management experience in instruments from European and American and
domestic famous companies.
We own first-class talent team, and all the products have reached
advanced level at home and abroad. We provide our customers with
complete and professional test control solutions and high-tech and
high-quality products.
Melan is your reliable friend and partner. We are willing to try
our best as dedication and perfection as motivation.
7.FAQ
Q: How long will you give me the reply?
A: We will contact you in 5 hours as soon as we can.
Q: What is the warranty of your prducts?
A: Our warranty is 12 months after the shipping date.
Q: What is the lead time of your products?
A: Normally our factory lead time is 10-12 working days.
Q: Can I OEM your products?
A: OEM and ODM customization are welcomed.
Q: What is your MOQ?
A: We have no MOQ limit, small quantity order is acceptable.
Q:What is the transport?
A: Express such as DHL, FedEx, UPS for freight prepaid, and we can
also use your own courier account to do the freight collect. For
more goods we can arrange by air or by sea.
