Electromagnetic Flow Meter with Different Colors for Paper Industry / Oil Industry / Food Industry
1. Introduction
MLF electromagnetic flow meter, composed of sensor and converter, works based on Faraday’s law of electromagnetic induction law. It is used to measure electrical conductivity of liquid or solid. Generally, the electrical conductivity should be over 5υS/cm(electrical conductivity of tap water, raw water is about 100~500υS/cm),It can also be used to measure various media like acid, alkali, saline solution, paper pulp or pulp and so on. But these media can’t contain a lot of magnetic materials and bubbles.
MLF electromagnetic flow meter is a kind of instrument which is used for measuring the flow conductivity liquid. The meter is widely used in flow measuring of Metallurgy, Chemical Industry, Paper Industry,Environmental Protection, Oil Industry, Textile Industry, Food Industry and City Administration, Water Works,etc.
2. Quick Details
1). It is high resistance, fast response design can make undistorted collection of weak signal and fast response to the flow changes. Its range rate can reach 100:1.
2). It has the function of low conductivity measurement.
3). It has the consistency of converter’s interchange, which can avoid input parameters repeatedly.
4). Wide range of power supply mode is available (DC: 18V-36V/AC: 85V-265V).
5). It is the first domestic company that adopts the function of saving settings before delivery,which can avoid the loss of the parameters.
6). It adopts the international leading excitation technology, which circuit is simple, stable,and reliable.
7). It has the function of infrared remote control and button operation so as to make the operation more convenient.
8). It provides the function of zero correction of sensor and automatic zero adjustment.
9). It has Chinese, English, Korean, Polish, Turkish, French and Portuguese languages for option to satisfy different customers’ requirements.
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 resistance to the corrosion of nitric acid, <5% sulfuric acid under room temperature, acetic acid, alkaline fluid, sulfite under certain pressure, seawater and scetic acid, etc. It can be widely used in petrochemical urea, vinylon. |
Hb | Good resistance to the all the concentration of hydrochloric acid below the boiling point, also resistance tothe corrosion of non-oxidizing acid, alkali, salt like sulfuric acid phosphoric acid hydrofluoric acid, organic acids. |
Hc | Resistance to the corrosion of oxidizing acids like metric acid, mixed acid. The mixture of chromium acid and sulfuric acid, and salts of oxidative, like Fe3+, Q3+, and some other oxidants, like hypochlorite salt solution higher than normal tmperature and seawater. |
Ti | Resistance the corrosion of seawater, various chlorides, hypochlorite, oxidizing acid(including fuming nitric acid), and organic acid or alkali, but don't be resistance to the corrosion of pure reducint acid(like sulfuric acid, hydrochloric acid). But if acid includes oxidants(like nitric acid, Fe3+, Q3+), the corrosion resistance will decrease. |
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. Instrument Detection & Maintenance
Electromagnetic flow converter has self-diagnosis function. In addition to the power and hardware circuit fault, The system also give alarm to other faults in general usage. These information are given accordingly prompts in the lower right of the screen.
1. Maintenance and repair
a) Sensor installation site should be consistent with the section four requirements, Please keep the housing clean and tidy;
b)Transmitter should be placed in a clean, ventilated, dry place;
c)Need to inspect every two years, for high precision users, instrument need to be submitted to censorship.
2. Transportation and storage
a)The instrument must be packed before transportation, be carefully handled when loading and unloading.
b)Storage site must be dry, ventilated, avoid corrosive gas erosion, the ambient temperature is not too low or too high;
c)Storage time better not exceed three years.
3,Unpacking and checking
a) The packing can’t be opened with heavy hammer, and should be careful not to damage the instrument
b) Check the content carefully according to the packing list.