Magnetic Water Flow Meter is an electromagnetic flowmeter used to measure conductive fluids. Conductive liquids such as drinking water, sewage, wastewater, seawater, ammonia, cement slurry, etc.
Magnetic Water Flow Meter provide highly accurate flow measurement for a wide variety of conductive fluid applications. Magnetic Water Flow Meter is a volumetric flow meter that measures liquids or liquid slurries that have a minimum conductivity of 5 µS/cm. Based on Faraday’s law of electromagnetic induction. Magnetic Water Flow Meter is ideal for wastewater applications or any dirty liquid which is conductive or water based. It is widely used in water treatment, environmental protection sewage measurement and control, papermaking and other industrial and agricultural production processes for flow measurement and control.
Sino-Inst offers a variety of Magnetic Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.
Features of Magnetic Water Flow Meter
- Not affected by changes in fluid density, viscosity, temperature, pressure and conductivity. The linear measurement principle can achieve high-precision measurement;
- There are no flow blocking parts in the measuring pipe. The pressure loss is small, and the requirements for straight pipe sections are low;
- Nominal diameter DN6-DN3000 covers a wide range. There are many choices of lining and electrodes. It can meet the requirements of measuring a variety of conductive fluids;
- The converter adopts programmable frequency low frequency rectangular wave excitation. It improves the stability of flow measurement and has low power loss;
- The converter adopts 16-bit embedded microprocessor. Full digital processing, fast calculation speed. Strong anti-interference ability, reliable measurement. High accuracy, flow measurement range up to 1500:1;
- High-definition backlit LCD display. Easy to use, simple to operate, easy to learn and understand;
- With RS485 or RS232 digital communication signal output;
- With conductivity measurement function, it can judge whether the sensor is empty or not. With self-check and self-diagnosis function;
- Adopt SMD devices and surface mount (SMT) technology. High circuit reliability;
- Can be used in corresponding explosion-proof occasions.
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Specifications of Magnetic Water Flow Meter
|Measuring medium:||Conductive liquids|
|Pressure(MPa)||DN15-DN300, PN<1.6MPa; DN350-DN800, PN<1.0MPa; |
above DN900, PN<0.6MPa;
|Measuring tube material||Carbon steel,304 stainless steel|
|The sensor measures the head material||ABS/Polypropylene|
|Electrode material||SUS316,hastelloy B,hastelloy C|
|Accuracy||flow velocity≤0.5m/s,±1.5%,Full range velocity>1m/s,±1.0%|
|Medium temperature(ºC)||ABS:+80ºC, Polypropylene:+80ºC|
|Straight pipe section requirements||upstream 15D,downstream 10D|
|Ingress protection||IP65,Optional IP68|
|Connection||flange connection,threaded connection|
|Power supply mode:||24V power supply or 220V power supply, 3.6V lithium battery power supply|
|Explosion-proof grade:||intrinsically safe ExdⅡia CT2-T5 flameproof ExdⅡCT2-T5|
|Transmission distance:||Two-wire 4-20mA standard current output: ≤1500m; |
485 output and HART output: ≤1200m
Take a quick look: How electromagnetic flowmeters work ?
Magnetic Water Flow Meter Applications
KLD electromagnetic water flowmeter can be used to measure the volume flow of conductive fluid in a closed pipeline. It is widely applied in the flow measurement and control in the fields of chemical and petroleum industry, metallurgy industry, water and wastewater, agriculture and irrigation, paper making, food and beverage industry and pharmaceutical industry.
The premise of using Magnetic Water Flow Meter is that the measured liquid must be conductive. The conductivity of the liquid cannot be lower than the threshold, the lower limit. If the conductivity is lower than the threshold, it will cause measurement error until it can not be used.
It can be measured even if the value exceeds the threshold, and the indication error does not change much. The threshold value of general electromagnetic flowmeter is between 10-4～(5×10-6)S/cm, depending on the model. It also depends on the length of the flow signal line between the sensor and the converter and its distributed capacitance. The product manual usually stipulates the signal line length corresponding to the conductivity.
Read more about: Digital Water Flow Meters
Magnetic Water Flow Meter to Measure Waste Water
The sewage treatment process is mainly through biological oxidation, flocculation, precipitation and other processes to achieve the purpose of sewage purification. At each stage, a certain gauge is needed to measure.
In the sewage industry, according to the characteristics of the corrosiveness, abrasiveness, temperature and condensation of the tested substance and the price tolerance. Different lining and electrode materials should be selected.
In the sewage treatment process, it is necessary to configure corresponding detection instruments according to the process requirements to form a reliable control system.
Generally, sewage treatment plants are equipped with flow meters in the following process inspection procedures:
- Water inlet pipe.
- Detection of mud volume from primary settling tank to mud storage tank.
- Detection of surplus and sludge flow in the sludge pump room.
- Detection of the return sludge flow in the sludge pump room.
- Detection of the effluent flow of the secondary settling tank distribution well.
- Detection of the sludge intake of the digestion tank.
- Digestion tank Mud output detection. 8. Flocculation tank reagent input detection, etc.
More about: Sewage Flow Meter Selection
Magnetic Water Flow Meter to Measure Industrial Water
The conductivity of industrial water and its aqueous solution is greater than 10-4S/cm. The conductivity of acid, alkali and salt solution is between 10-4～10-1S/cm, so there is no problem in use. Low distilled water is 10-5S/cm and there is no problem.
The electromagnetic flowmeter cannot measure liquids with very low conductivity. Such as petroleum products and organic solvents. Cannot measure gas, steam and liquids containing more and larger bubbles.
It is found from the data that some pure liquids or aqueous solutions have low conductivity and are considered unusable. However, in actual work, we will encounter examples that can be used because of impurities. Such impurities are beneficial to increase conductivity.
For aqueous solutions, the conductivity in the data is measured in the laboratory with pure water ratio. The actual aqueous solution may be proportioned with industrial water. The conductivity will be higher than found, which is also conducive to flow measurement.
Extended reading: Industrial VS Residential inline water flow meters
Magnetic Flow Meter Price
|Electromagnetic flowmeter selection table|
|C||Sanitary type-clamping connection|
|Electrode material||Y||One body|
|Structure of flowmeter||1||SUS316L|
|2||Hastelloy b 2B|
|3||Hastelloy b 2C|
|6||Platinum iridium alloy|
|7||Stainless steel coated tungsten carbide|
|Output signal||P||Volume flow4-20mA/pulse|
|H||Volume flow HART protocal output|
Extended Reading: LORA water meter
Main performance of lining material:
|Lining material||Main performance||Scope of application|
|Polytetrafluoroethylene (PTFE)||1. A material with relatively stable chemical properties in plastics can withstand boiling hydrochloric acid, sulfuric acid and aqua regia, but also resistant to concentrated alkalis and various organic solvents, and is not resistant to chlorine trifluoride, high-flow liquid fluorine, liquid oxygen, and ozone. corrosion.|
2. Poor wear resistance
|Strong corrosive media |
such as concentrated acid and alkali
|PFA||Corrosion resistance is the same as PTFE, strong resistance to negative pressure||Can be used in negative pressure state|
|F46||1. Corrosion resistance is the same as PTFE 2. Low abrasion resistance 3. Strong negative pressure resistance||1. Same as PTFD|
2. Can be used for low-wear media
|Neoprene||1. Excellent elasticity, high breaking force, good wear resistance|
2. Resistant to the corrosion of a certain low concentration of acid, alkali, and salt media, and not resistant to the corrosion of oxidizing media
|Water, sewage, ore slurry, weak abrasive mud|
|Polyurethane||1. Excellent abrasion resistance (equivalent to 10 times of natural rubber)|
2. Poor acid and alkali resistance
3. Cannot be used for water mixed with organic solvents
|Neutral and strong abrasion slurry, coal slurry, mud, etc.|
Corrosion resistance of electrode material:
|Electrode material||Corrosion resistance|
|SUS316||Used for industrial water, domestic water, and weak alkali corrosive media,|
Widely used in petroleum, chemical, urea, vinylon and other industries
|Stainless steel coated tungsten carbide||For non-corrosive, strong abrasive media|
|Hastelloy B (HB)||It has good corrosion resistance to all concentrations of hydrochloric acid below the boiling point, and it is also resistant to sulfuric acid, phosphoric acid, hydrofluoric acid, organic acids, etc.|
Corrosion of oxidizing acid, alkali, and non-oxidizing salt solution
|Hastelloy C (HC)||It is resistant to oxidizing acids, oxidizing salts or other oxidizing agents.|
|Titanium (Ti)||It is resistant to corrosion by sea water, various chlorides and hypochlorites, oxidizing acids, organic acids, alkalis, etc., but not resistant to corrosion by purer reducing acids. But if the acid contains an oxidant, the corrosion is greatly reduced|
|Tantalum (ta)||It has excellent corrosion resistance, which is very similar to glass, except for hydrofluoric acid, fuming sulfuric acid and alkali, it can withstand the corrosion of almost all chemical media.|
|Platinum-iridium alloy||Almost suitable for all chemical substances, but not suitable for aqua regia and ammonium salt.|
Extended Reading: 3 inch (3″) Water Flow Meter
The price of electromagnetic flowmeter is determined by the selection of electromagnetic flowmeter. The Magnetic Water Flow Meter reference price is USD550.00-3000.
The key questions which need to be answered before selecting a magnetic flow meter are:
- Is the fluid conductive or water based?
- Is the fluid or slurry abrasive?
- Do you require an integral display or remote display?
- Do you require an analog output?
- What are the minimum and maximum flow rate for the flow meter?
- What are the minimum and maximum process pressure?
- What are the minimum and maximum process temperature?
- Is the fluid chemically compatible with the flow meter wetted parts?
- What is the size of the pipe?
- Is the pipe always full?
How much is a 2 inch water flow meter? Let’s find out.
If you have question about Magnetic flow meter,
Please contact us, our engineer will offer help.
Extended Reading: Guide: Magnetic Flowmeter Installation
Featured Water Flow Meters
Extended reading: Sludge flow meter for sewage treatment return activated sludge system
Sino-Inst offers over 50 magnetic water flow meter for flow measurement. About 50% of these are wastewater flow meters, 40% is the liquid flow sensor. And 20% are Ultrasonic Flow Transmitter and mass flow meter.
A wide variety of flow meters options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of flow measurement instrumentation, located in China.
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