Active Member
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[China]
Address: No.21, Lane 697, Guangfulin Road, Songjiang District, Shanghai, China
Contact name:Nancy Zhao
Melan Measurement & Control Instruments (Shanghai) Co.,Ltd. |
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Electromagnetic Flow Meter for Water Flow Measurement Devices Liquid
1. Introduction
The MLF electromagnetic flowmeter works according to Faraday's law of electromagnetic induction and consists of a sensor and a transducer. Used to measure the conductivity of a liquid or solid. In general, its conductivity should be greater than 5μS/cm (tap water, raw water conductivity of about 100 ~ 500μS/cm), can also be used to measure acid, alkali, salt water, pulp or pulp and other media. However, these media should not contain large amounts of magnetic material and air bubbles.
MLF electromagnetic flowmeter is a kind of instrument to measure liquid fluidity. Widely used in metallurgy, chemical industry, paper making, environmental protection, petroleum, textile, food, urban management, water plant and other industries flow measurement.
2. Quick Details
MLF electromagnetic flowmeter is explosion-proof design.
Function of low conductivity measurement.
There are 9 language options to meet the needs of different customers.
Self-regulating function and self-checking.
Different outputs are optional: Hart, RS485,Profibus, 4-20mA, frequency and 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 Electrode Materials
| Electrode Material | Main Performance |
| 316L | Good corrosion resistance of nitric acid, sulfuric acid, acetic acid, alkaline liquid at room temperature < 5%, sulfite, seawater, acetic acid and other corrosion under certain pressure, can be widely used in petrochemical urea, vinylon and so on. |
| Hb | Good resistance to all concentrations below the boiling point of hydrochloric acid, but also resistant to non-oxidizing acid, alkali, sulfuric acid, phosphoric acid, hydrofluoric acid, organic acid corrosion. |
| Hc | Resistant to the corrosion of oxidizing acid, such as nitric acid and mixed acid. The mixture of chromic acid and sulfuric acid, oxidized salts, such as Fe3+, Q3+, and other oxidants, such as the mixture of hypochlorite solution and seawater at higher than normal temperature. |
| Ti | Resistant to corrosion of seawater, various chlorides, hyalphates, oxidizing acids (including smoke nitric acid), organic acids or alkalis, but not pure reduced acids (e.g. sulphuric acid, hydrochloric acid). However, if the acid contains oxidants (e.g. nitric acid, Fe3, Q3), corrosion resistance is reduced. |
| Ta | Good corrosion resistance similar to glass. Resistance to the corrosion of chemical medium(including hydrochloric acid and fumiing sulfuric acid), but can not be used for sodium hydromide fluid. |
| Pt-Ir | Have good corrosion resistance of all acid, and can be resistance to the corrosion of alkali, all salt except aqua regia, ammonium slat and few other medium |
| Tungsten Carbide | For pulp and sewage, good resistance to solid particle interference. |
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. Configuration
| MLF Series Electromagnetic Flow Meter Configuration | |||||||||||||||||||||||
| Model | MLF | ||||||||||||||||||||||
| Sensor Installation | S | Flange Type Sensor | |||||||||||||||||||||
| C | Insertion Type Sensor | ||||||||||||||||||||||
| O | Others | ||||||||||||||||||||||
| Pipeline Diameter | 10 | 10mm | |||||||||||||||||||||
| 15 | 15mm | ||||||||||||||||||||||
| 20 | 20mm | ||||||||||||||||||||||
| ...... | |||||||||||||||||||||||
| 2000 | 2000mm | ||||||||||||||||||||||
| Electrode Installation | F | Standard Fixed Type | |||||||||||||||||||||
| Electrode Material | A | 316L SS | |||||||||||||||||||||
| B | Hb | ||||||||||||||||||||||
| C | Ta | ||||||||||||||||||||||
| D | Ti | ||||||||||||||||||||||
| E | Hc | ||||||||||||||||||||||
| F | Tungsten Carbide | ||||||||||||||||||||||
| G | Others | ||||||||||||||||||||||
| Liner Material | R | Rubber | |||||||||||||||||||||
| P | PTFE | ||||||||||||||||||||||
| O | Others | ||||||||||||||||||||||
| Pipe Material | B | 304 SS (Standard) | |||||||||||||||||||||
| C | 316 SS | ||||||||||||||||||||||
| Flange Type | G | GB (Standard) | |||||||||||||||||||||
| A | ANSI | ||||||||||||||||||||||
| J | JIS | ||||||||||||||||||||||
| B | BS | ||||||||||||||||||||||
| O | Others | ||||||||||||||||||||||
| Flange Material | A | 304 SS | |||||||||||||||||||||
| B | 316 SS | ||||||||||||||||||||||
| C | #20 Carbon Steel (Standard) | ||||||||||||||||||||||
| Cover Material | D | 304 SS | |||||||||||||||||||||
| E | 316 SS | ||||||||||||||||||||||
| F | Carbon Steel+ Epoxy Metallic Paint (Standard) | ||||||||||||||||||||||
| Matching Flange | 0 | Without Matching Flange (Standard) | |||||||||||||||||||||
| 1 | With Matching Flange | ||||||||||||||||||||||
| Ground Ring | 0 | Without Ground Ring (Standard) | |||||||||||||||||||||
| 1 | With Ground Ring | ||||||||||||||||||||||
| Rated Pressure | 10 | 1.0MPa | |||||||||||||||||||||
| 16 | 1.6MPa | ||||||||||||||||||||||
| 25 | 2.5MPa | ||||||||||||||||||||||
| 40 | 4.0MPa | ||||||||||||||||||||||
| Working Temperature | E | ≤60℃ | |||||||||||||||||||||
| H | ≤180℃(Divided Type) | ||||||||||||||||||||||
| Type | I | Integrated Type | |||||||||||||||||||||
| D | Divided Type | ||||||||||||||||||||||
| Output | P | Pulse | |||||||||||||||||||||
| A | 4-20mA | ||||||||||||||||||||||
| G | RS485 | ||||||||||||||||||||||
| H | Hart | ||||||||||||||||||||||
| Q | Others | ||||||||||||||||||||||
| Power Supply | 0 | 220VAC | |||||||||||||||||||||
| 1 | 24VDC | ||||||||||||||||||||||
| 2 | Battery-powered | ||||||||||||||||||||||
| Protection Class | 0 | IP65 (Integrated/Divided Type) | |||||||||||||||||||||
| 1 | IP67 (Divided Type) | ||||||||||||||||||||||
| 2 | IP68 (Divided Type) | ||||||||||||||||||||||
| Other Features | R | Heat Energy Function | |||||||||||||||||||||
| P | With PT1000 | ||||||||||||||||||||||
| B | Without PT1000 | ||||||||||||||||||||||
| Explosion Proof | 0 | None | |||||||||||||||||||||
| EX | Explosive Proof | ||||||||||||||||||||||
7. Instrument Testing & Maintenance
Electromagnetic flowmeter has self-diagnosis function. In addition to power supply and hardware circuit faults, the system also alarms other faults in general use. These messages are prompted in the bottom right corner of the screen.
Maintenance and repair
A) The sensor installation site shall meet the requirements of Section 4, and please keep the shell clean;
B) The transmitter shall be placed in a clean, ventilated and dry place;
C) The instrument shall be inspected every two years. For high-precision users, the instrument shall be submitted for review.
Transportation and storage
A) The instruments must be packed well before transportation and handled with care during loading and unloading.
B) The storage site must be dry and ventilated to avoid corrosive gas, and the ambient temperature should not be too low or too high;
C) Storage time should not exceed three years.
3. Open the box for inspection
A) The package must not be opened with a heavy hammer. Care must be taken not to damage the instrument
B) Carefully check the contents according to the packing list.
