Low Conductivity Measurement Electromagnetic Flow Meter EMF
Equipment For Chemical Liquid
1. Introduction
MLF electromagnetic flowmeter works according to Faraday's law of
electromagnetic induction, and is composed of sensors and
converters. Used to measure the conductivity of liquid or solid. In
general, its conductivity should be greater than 5μs/cm (tap water
and raw water conductivity is about 100 ~ 500μs/cm), and it can
also be used to measure acid, alkali, brine, pulp or pulp and other
media. However, these media cannot contain a large amount of
magnetic substances and bubbles.
MLF electromagnetic flowmeter is an instrument for measuring liquid
fluidity. Widely used in metallurgy, chemical industry, paper
making, environmental protection, petroleum, textile, food, urban
management, water plant and other industries.
2. Features
MLF electromagnetic flowmeter is explosion-proof design.
Low conductivity measurement function.
There are nine languages options to meet the needs of different
customers.
It has self-regulation function and self-test.
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 Electrode Materials
| Electrode Material | Main Performance |
| 316L | Good corrosion resistance to nitric acid, less than 5% corrosion of
sulfuric acid, acetic acid, alkaline liquid, sulfite, seawater and
acetic acid under certain pressure at room temperature, and can be
widely used in petrochemical urea, vinylon and so on |
| Hb | Good resistance to all concentrations below boiling point of
hydrochloric acid, but also resistant to non-oxidizing acids,
alkalis, sulphuric 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 | It is resistant to corrosion of sea water, various chlorides,
hypochlorite, oxidizing acid (including fuming nitric acid),
organic acid or alkali, but not pure reducing acid (such as
sulfuric acid, hydrochloric acid). However, if the acid contains oxidants (such as nitric acid, Fe3+,
Q3 +), the corrosion resistance will be 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. Instrument Testing & Maintenance
Electromagnetic Flowmeter has self-diagnosis function. In addition
to power and hardware circuit failures, the system also alarm other
faults in general use. The information is prompted in the lower
right corner of the screen.
1. Maintenance and repair
a) sensor installation site should meet the requirements of Section
4, please keep the shell clean;
b) transmitters shall be placed in a clean, ventilated, dry place;
c) need to be checked every two years, for high-precision users,
the instrument needs to be submitted for review.
2. Transport and storage
a) instruments must be packed before transportation, loading and
unloading should be carefully light.
b) storage place must be dry, ventilated, avoid corrosive gas
erosion, environmental temperature should not be too low or too
high;
c) storage time should not exceed three years.
3. Open-box inspection
a) packing must not be opened with a heavy hammer, be careful not
to damage the instrument
b) carefully check the contents according to the packing list.
7. Product Photos
