Magnetic Water Flow Meter

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.

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.

Guess you like: What is Reynolds number?

Specifications of Magnetic Water Flow Meter

Measuring medium:	Conductive liquids
Diameter(mm)	DN15~DN3000
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
Environmental conditions	-25ºC~+60ºC
relative humidity	5%~95%,
Atmospheric pressure	86~106kPa
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:

1. Water inlet pipe.
2. Detection of mud volume from primary settling tank to mud storage tank.
3. Detection of surplus and sludge flow in the sludge pump room.
4. Detection of the return sludge flow in the sludge pump room.
5. Detection of the effluent flow of the secondary settling tank distribution well.
6. Detection of the sludge intake of the digestion tank.
7. 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
KLD								SENSOR
Nominal diameter	15							DN15 0.19-3.18m³/h
	…							… Unit:mm
	3000							DN3000
Pressure rating		6						0.6Mpa
		10						1.0Mpa
		16						1.6Mpa
		40						4.0Mpa
		…						Special requirements
		160						16.0Mpa
Connection mode			F					Flange
			I					plug-in
			C					Sanitary type-clamping connection
			ST					Sanitary-thread connection
Lining material				1				Polytetrafluoroethylene(PTEE)
				2				Polychloroprene
				3				Polyurethane rubber
				4				F46
				5				Fluorosilicone gum
				6				PFA
Electrode material					Y			One body
					F			Separate type
					L			Separate type/immersion
Structure of flowmeter						1		SUS316L
						2		Hastelloy b 2B
						3		Hastelloy b 2C
						4		Titanium
						5		Tantalum
						6		Platinum iridium alloy
						7		Stainless steel coated tungsten carbide
Output signal							P	Volume flow4-20mA/pulse
							B	Volume flow4-20mA/RS232
							M	Volume flow4-20mA/RS485
							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.

Request a Quote

Contact Us

KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.

Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.