High-Precision Digital Flow Meter for Oil & Gas Applications

Product Description

AEMF Series Electromagnetic Flowmeter
Chengdu Andisoon Measure Co., Lt

Overview

An electromagnetic flow meter is an instrument that measures liquid flow based on Faraday's law of electromagnetic induction. It is capable of measuring the flow of various conductive liquids, such as water, wastewater, and chemical fluids.
Electromagnetic flow meters offer high accuracy, excellent stability, no moving parts, and strong resistance to media corrosion. Because of these advantages, they are widely used in industries such as water treatment, wastewater management, chemical processing, food and beverage, and pharmaceuticals for flow measurement and process control.
The working principle of an electromagnetic flow meter is based on generating a magnetic field when conductive liquid flows through a pipe. The induced voltage produced by the fluid passing through the magnetic field is proportional to the flow velocity, allowing accurate flow measurement.
Electromagnetic flow meters are available in multiple models and specifications. The appropriate type can be selected based on the properties of the liquid, flow range, and operating environment.
In summary, the electromagnetic flow meter is a high-precision, stable, and maintenance-free flow measurement instrument that is widely used for accurate measurement and control of conductive liquid flow across a broad range of industrial applications.

 

Our Advantages

High accuracy: 0.15%.The measured volumetricflow rate is not affected by fluid density,viscosity,temperature orpressure.

Noclogdesign:  Lower pressureloss.

Bidirectional Flow Measurement: Capable of  measuringflowin

Best choice for corrosive  process fluids: Various electrodes and linings,suitable fo all typesof conductive corrosive  liquids such as acids,alkalis,and salt solutions.

Wide range ratio: 20:1 to 1000:1,with selectable wide flow ranges.The full-scale liquid flow velocity can be configured between 0.5m/s and
10m/s.

Easy installation: Lower requirements forstraight pipe line,5Dupstream straight pipe,2D downstream straight pipe.

Wideline size: DN 3mm to DN 3000mm.

Product Description

·Measurement accuracy is not affected by changes in fluid density, viscosity, temperature, pressure, or electrical conductivity, ensuring stable performance in various applications

·The measuring tube has no obstructing moving parts and causes no pressure loss, helping reduce energy consumption.

·Low requirements for straight pipe sections, saving installation space.

·The converter uses an LCD backlit display, ensuring easy reading in both direct sunlight and dark environments.

·Parameters can be configured via infrared touch buttons, allowing safe operation without opening the converter cover even in harsh environments.

·The flow meter supports bidirectional measurement and includes three built-in totalizers: forward total, reverse total, and net total, with display of both forward and reverse flow.

·Multiple output options are available, including current output, frequency/pulse output, HART communication, and RS485 digital communication.

·Equipped with self-diagnostic alarm functions, empty pipe detection, and high/low flow alarm outputs.

·Suitable not only for general process monitoring but also for measuring slurries, pulp, and viscous fluids.

Measurement Principle

The measurement principle is based on Faraday's law of electromagnetic induction. When a conductor moves through a magnetic field and cuts magnetic flux lines, an electromotive force is generated in the conductor. The induced electromotive force E is expressed as:
E = K B V D
K: Instrument constant
B: Magnetic flux density
V: Average flow velocity across the cross-section of the measuring tube
D: Inner diameter of the measuring tube

 

Product Parameters

Nominal Diameter	DN3~DN3000
Pressure limited	Maximum 42 MPa
Accuracy	±0.5% of reading(±0.2%,±0.3%Optional)
Liner Materials	PTFE,PFA,F46,chloroprene rubber,silicone fluorine rubber,polyurethane rubber
Electrode Type	Standard type,scraper type
Electrode Materials	316L,Hastelloy C,Hastelloy B,Titanium,Tantalum,Platinum-Iridium alloy,316L
	coated with tungsten carbide
Medium Temperature	-40ºC~180ºC
	-40°ºC~180ºC(Related to liner)
Ambient Temperature	-40ºC~60ºC
Ambient Humidity	5%-95%non-condensing
Conductivity	≥20μs/cm
Flow Range	1000:1(flow rate <15m/s)
Structure	integral type,remote type,immersion type,explosion-proof type
Conduit	M20*1,5F,1/2NPTF
Enclosure	IP65,IP66,IP67,IP68  IP65,IP66,IP67,IP68 optional
Installation Type	flange type,wafer type,insert type
Output Signal	pulse+4~20mA+HART,Pulse+4~20mA+RS485,Profibus-PA
Power Supply	220VAC/50Hz,24VDC,3.6V Lithium battery
Explosion-Proof	Exdb ia[iaGa]qII CT6Gb
certification
Product Standard	JB/T2948-2015

Converter Performance Parameters

Power Supply	AC 220V 50Hz / DC 24V / 3.6V battery powered
Power Consumption	Power Consumption
Power Consumption	Bilingual (Chinese/English) display; shows instantaneous flow, total flow, and alarm status (excitation circuit failure alarm, empty pipe alarm, flow limit alarm); equipped with four membrane touch keys for parameter setting
Totalizer	Forward total, reverse total, net (difference) total
Output Signals	Analog Output	4~20mADC;Load Resistance:0~750Ω
	Frequency/Pulse Output	Used for forward or reverse instantaneous flow measurement; range: 1-5000 Hz or up to 5000 pulses/s; electrical isolation via optocoupler, isolation voltage >1000 VDC; output driver: MOSFET output, max voltage 35 VDC, max load current 250 mA
		range: 1-5000 Hz or up to 5000 pulses/s; output driver:
		electrical isolation via optocoupler, isolation voltage >1000 VDC;
		MOSFET output, max voltage 35 VDC, max load current 250 mA
	Alarm Output(Optional)	Used for high/low flow limit alarms; output driver:
		electrical isolation via optocoupler, isolation voltage >1000 VDC;
		MOSFET output, max voltage 35 VDC, max load current 250 mA
	Communication	Optional RS485 / HART communication
Accuracy	Optional RS485 / HART communication
Damping Time	Adjustable from 0-100 s (90% response time, segmented settings available)
Lightning Protection	Yes
Lightning Protection	Built-in non-volatile clock; stores up to 16 power-off records (10-year retention)
Protection Class	IP65
Explosion-proof Marking	Ex db ia [ia Ga] q IIC T6 Gb

 

Flange-Type Sensor Performance Parameters

 

Parameter	Specification
Nominal Diameter	DN3 mm - DN900 mm
Nominal Pressure	0.6 - 4.0 MPa (custom higher pressure available)
Accuracy	±0.5% of reading; optional ±0.3% or ±0.2% of reading
Liner Materials	Chloroprene rubber, polyurethane rubber, fluorosilicone rubber, PTFE, FEP (F46), PFA
Electrode Types	Standard type, scraper type, replaceable type (customizable)
Electrode Materials	SS316L, Hastelloy B, Hastelloy C, titanium, tantalum, Monel, platinum/iridium alloy, stainless steel coated with tungsten carbide

 

 

High Pressure Type Sensor Technical Specifications
 

Item	Specification
Nominal Diameter	DN25 mm ~ DN250 mm
Nominal Pressure	6.3 MPa, 10 MPa, 16 MPa, 25 MPa, 42 MPa
Accuracy	±0.5% of reading, optional ±0.3% or ±0.2% of reading
Liner Materials	PTFE (Polytetrafluoroethylene), FEP (F46), PFA
Electrode Materials	SUS316, Hastelloy B, Hastelloy C, Titanium, Stainless Steel with Tungsten Carbide Coating
Structure Type	Integral type, split type
Medium Temperature (FEP / PFA Lining)	-10°C ~ +160°C
Medium Temperature (PTFE Lining)	-10°C ~ +120°C
Ambient Temperature	-25°C ~ +60°C
Medium Conductivity	≥20 μS/cm
Connection Type	Flange type, Hammer Union type
Product Standard	JB/T9248-2015 Electromagnetic Flowmeter

 

 

Electrode Material Corrosion Resistance
 

Electrode Material	Corrosion Resistance Characteristics
SUS316	Suitable for industrial water, potable water, wastewater, and mildly corrosive media. Widely used in petroleum, chemical, steel industries, as well as municipal and environmental protection applications.
Hastelloy B (HB)	Resistant to non-oxidizing acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, organic acids, as well as alkalis and non-oxidizing salt solutions at room temperature.
Hastelloy C (HC)	Resistant to oxidizing salts such as Fe and Cu salts or media containing other oxidizing agents. Also resistant to hypochlorite solutions and seawater corrosion.
Titanium (Ti)	Resistant to seawater, various chlorides and hypochlorites, oxidizing acids (including fuming sulfuric acid), organic acids, and alkalis. However, corrosion resistance decreases significantly in acids containing oxidizing agents such as nitric acid, Fe, or Cu.
Tantalum (Ta)	Offers excellent corrosion resistance similar to glass. Resistant to almost all chemical media except hydrofluoric acid, fuming sulfuric acid, and alkalis. Suitable for hydrochloric acid, nitric acid, sulfuric acid below 150°C, and aqua regia. Note: Not resistant to alkalis.
Platinum / Iridium Alloy	Suitable for almost all chemical substances, except aqua regia and ammonium salts.
Stainless Steel with Tungsten Carbide Coating	Suitable for non-corrosive but highly abrasive media.

Applicable Liners, Pressure Ratings, and Electrodes for Different Sizes
 

Size Range	Pressure Rating	Available Liner Materials	Available Electrode Materials
DN25 mm ~ DN250 mm	10 MPa, 16 MPa, 25 MPa, 42 MPa	FEP (F46), PFA	SUS316, Hastelloy B, Hastelloy C, Titanium, Tantalum, Stainless Steel with Tungsten Carbide Coating
DN3 ~ DN6	0.6 MPa, 1.0 MPa, 1.6 MPa, 2.5 MPa, 4.0 MPa, 6.3 MPa, 10 MPa, 16 MPa, 25 MPa, 42 MPa	FEP (F46), PFA	SUS316, Hastelloy B, Hastelloy C, Tantalum
DN10 ~ DN900	0.6 MPa, 1.0 MPa, 1.6 MPa, 2.5 MPa, 4.0 MPa, 6.3 MPa	PTFE, Polyurethane Rubber, FEP (F46), PFA, Silicone Fluorine Rubber	SUS316, Hastelloy B, Hastelloy C, Titanium, Tantalum, Stainless Steel with Tungsten Carbide Coating
DN40 ~ DN900	0.6 MPa, 1.0 MPa, 1.6 MPa, 2.5 MPa, 4.0 MPa, 6.3 MPa	Chloroprene Rubber	SUS316, Hastelloy B, Hastelloy C, Titanium, Tantalum, Stainless Steel with Tungsten Carbide Coating

Overall Dimensions

Flanged Type Sensor Outline Drawing

Overall Dimensions of Flanged Type Sensor
 

Nominal Diameter	Nominal Pressure	Overall Dimension(mm)			N.W
(mm)	(MPa)	L (Lined)	D	H	(kg)
3	4	200	90	220	6
6		200	90	220	6
10		200	90	220	6
15		200	95	220	8
20		200	105	220	10
25		200	115	223	12
32		200	140	240	13
40		200	150	250	14
50		200	165	263	15
65	1.6	250	185	283	18
80		250	200	290	20
100		250	235	318	25
125		250	270	350	28
150		300	300	380	30
200		350	340	430	50
250		450	405	495	70
300	1	500	460	547	95
350		550	520	602	120
400		600	580	665	140
450		600	640	720	160
500		600	715	783	200
600		600	840	897	280
700		700	895	982	350
800		800	1050	1092	400
900		900	1115	1192	480

Note: For pressure ratings within 4.0 MPa, instruments with the same nominal diameter have identical face-to-face lengths regardless of pressure class. For other specific dimensions, please consult the manufacturer.

Connection Flange Standard:                                                                                    Flange Diagram

4.0MPa(DN3mm~DN50mm)	GB/T9119-2000
1.6MPa(DN65mm~DN250mm)	JB/T81-94
1.0MPa(DN300mm~DN900mm)	JB/T81-94

Flange Size
 

Nomianl Pressure (Mpa)	Nominal Diameter	D(mm)	K(mm)	Φ(mm)	n	C(mm)
	DN(mm)
4	3	90	60	14	4	14
	6	90	60	14	4	14
	10	90	60	14	4	14
	15	95	65	14	4	16
	20	105	75	14	4	16
	25	115	85	14	4	16
	32	135	100	18	4	18
	40	145	110	18	4	18
	50	160	125	18	4	20
1.6	65	180	145	18	4	24
	80	195	160	18	8	24
	100	215	180	18	8	26
	125	245	210	18	8	28
	150	280	240	23	8	28
	200	335	295	23	12	30
	250	405	355	25	12	32
1.0	300	440	400	23	12	28
	350	500	460	23	16	28
	400	565	515	25	16	30
	450	615	565	25	20	30
	500	670	620	25	20	32
	600	780	725	30	20	36
	700	895	840	30	24	36
	800	1010	950	34	24	38
	900	1110	1050	34	28	42

 

Company Profile

Chengdu Andisoon Measurement Co., Ltd. (hereinafter referred to as "Andisoon") is a wholly owned subsidiary of Houpu Clean Energy Group Co., Ltd. Established in March 2008, the company specializes in the research, development, manufacturing, and service of industrial flow measurement and clean energy equipment solutions.

Andisoon provides a wide range of products including Coriolis mass flowmeters, electromagnetic flowmeters, cryogenic submerged pumps, LNG/CNG/Hydrogen fueling equipment, loading and unloading skids, flow measurement systems, and automation control solutions. The products are widely used in oil & gas, LNG/CNG applications, hydrogen energy, chemical processing, water treatment, industrial utilities, and other process industries.

Our electromagnetic flowmeters utilize advanced digital signal processing technology with excellent anti-interference capability, high measurement accuracy, and reliable long-term operation. The products are suitable for conductive liquid measurement in water supply, wastewater treatment, chemical processing, mining, metallurgy, food & beverage, pharmaceutical, and industrial process applications.

With strong technical capabilities and extensive application experience, Andisoon provides professional product selection, customized engineering solutions, system integration, and after-sales technical support for global customers.

The company has obtained ISO 9001, ISO 14001, and ISO 45001 certifications. Products can comply with international standards and certifications including EAC, SIL2, ATEX, IECEx, PAC, QAN/QAR, and other project-specific requirements.

Relying on Houpu Group's industrial platform and global market resources, Andisoon is committed to becoming a globally competitive provider of flow measurement and clean energy equipment solutions.

 

Why choose us?

Through many tests and improvements, ANDISOON summed up our experience and finally determined an inlet and outlet combined splitter cone, vacuum nickel-based brazing and heat treatment technology suitable for the CNG flowmeter produced by our company.

1. Imported combined splitter cone (obtained utility model patent - patent number: 201020170649.5)

The inlet end and the outlet end are structurally symmetrical and are connected by a pipe body. The inlet end and the outlet end are composed of an interface joint, a shunt cone, two measuring tubes and a measuring tube joint, wherein the interface joint and the measuring tube joint form a The two are docked and positioned with a shunt cone. The measuring tube is inserted into the measuring pipe joint and then welded. The shunt cone is inserted into the measuring tube and the measuring pipe joint. The measuring tube and the shunt cone maintain a tight positioning fit.
The measuring tube and the measuring tube joint are welded by argon arc welding; the diverter cone is inserted into the inner hole of the measuring tube joint in the axial and radial directions, and the diverter cone is positioned in conjunction with the measuring tube in the circumferential direction.
The interface joint is placed on the diverter cone, so that the outer cone surface of the diverter cone and the inner cone surface of the interface joint are positioned axially, and the inner hole of the interface joint is positioned radially. The interface joint and the diverter cone are also integrally pressed. Tight and welded with argon arc welding.

Beneficial effects:
When used in CNG flowmeters, this utility model can effectively improve the yield of CNG flowmeters, reduce the overall production cost, and scientifically ensure the overall performance of the CNG flowmeter. Moreover, this method and structure also have the characteristics of easy parts processing, low cost, and easy assembly and welding. The application of this method and structure will be of great help to the development of low-priced, high-performance domestic CNG flow meters, and will lay a solid foundation for the market dominance of domestic CNG flow meters.

2. Vacuum nickel-based brazing and heat treatment (obtained invention patent - patent number: 201010186127.9)

This process is completed according to the process flow of parts positioning, parts calibration, surface treatment, solder laying, vacuum welding and vacuum insulation, and cooling out of the furnace. It effectively solves the problem of CNG flowmeter failure caused by uneven heating of the measuring tube due to conventional silver-based manual soldering. Performance is greatly reduced.
After this process is applied in the production process of CNG flow meters, the deformation of the measuring tube and the uneven internal stress are minimized, which greatly improves the performance of the CNG flow meter. The yield can reach 95% and the overall cost is reduced. It is suitable for CNG flow. Large-scale mass production of CNG flow meters; it can bring the overall technology and accuracy of CNG flow meters to a new level; it will be of great help to the development of low-priced, high-performance domestic CNG flow meters and create a better market for domestic CNG flow meters. Dominance has laid a solid foundation.

3. High-precision time difference detection technology

It is used for high-precision time difference testing of mass flow meters. The time difference measurement can reach within 0.3 nanoseconds, ensuring high accuracy of measurement; it adopts DSP (digital signal processing) technology and can effectively replace imported products.

1) Adaptive linear digital filtering technology

It can filter out the interference waveform of the output current of the mass flow meter sensor. Linear filtering does not affect the linear characteristics of the flow meter. In addition, because the transmitter needs to adapt to sensors with multiple natural frequencies, an adaptive algorithm is designed to achieve frequency adaptation. Ensure the versatility of the filtering algorithm.

2) Weak signal detection circuit based on high-precision differential analog operational amplifier

It belongs to the circuit design of the mass flow meter. The design of the voltage follower prevents the output from affecting the input. The design of the differential circuit effectively suppresses common mode interference signals. It has strong anti-interference performance, low detection signal amplitude and high accuracy.

3) Adaptive broadband oscillation technology based on frequency sweep algorithm

Used for mass flow meters, it has a wide frequency sweep range and fast frequency sweep speed, effectively ensuring the detection of the center frequency. Different sensors can be set to different frequency sweep ranges.

4) Synchronous phase tracking technology for constant measurement of tube resonance amplitude

It is used in mass flow meters to ensure that the resonance amplitude of the measuring tube is stable, the fluctuation is small, and the phase synchronization can be achieved within 6°.

 

 

Certifications

FAQ

FAQ - Electromagnetic Flowmeter

1. What is an electromagnetic flowmeter?

An electromagnetic flowmeter (mag flow meter) is a device used to measure the flow rate of conductive liquids based on Faraday's Law of Electromagnetic Induction. It is widely used for water, wastewater, chemicals, slurry, pulp, and other conductive media.

2. What liquids can an electromagnetic flowmeter measure?

Electromagnetic flowmeters are suitable for conductive liquids, including:

• Water

• Wastewater

• Sewage

• Acid and alkali solutions

• Chemical liquids

• Slurry and pulp

• Food and beverage liquids

• Industrial process fluids

They are not suitable for non-conductive media such as:

• Oil

• Gas

• Steam

• Pure hydrocarbons

 

3. What is the minimum conductivity requirement?

Most electromagnetic flowmeters require liquid conductivity greater than 5 μS/cm.

 

4. What are the advantages of electromagnetic flowmeters?

Main advantages include:

• High measurement accuracy

• No moving parts

• Low pressure loss

• Strong anti-interference capability

• Wide measuring range

• Excellent reliability

• Suitable for corrosive media

• Low maintenance requirement

 

5. What industries use electromagnetic flowmeters?

Electromagnetic flowmeters are widely used in:

• Water treatment

• Wastewater treatment

• Chemical industry

• Oil & gas auxiliary systems

• Mining and metallurgy

• Pulp & paper

• Food & beverage

• Pharmaceutical industry

• Power plants

• Municipal engineering

 

6. What pipe sizes are available?

Typical sizes range from DN10 to DN2000. Customized larger sizes are also available for special applications.

 

7. What accuracy can be achieved?

Standard accuracy:

• ±0.5%

Optional high accuracy:

• ±0.3%

• ±0.2% (for certain models)

8. What output signals are available?

Common output options include:

• 4-20mA

• Pulse output

• Frequency output

• RS485 Modbus

• HART communication

9. What installation types are available?

Electromagnetic flowmeters are available in:

• Integral type

• Remote type

• Flange type

• Wafer type

• Insertion type

10. What lining materials are available?

Common lining materials include:

• PTFE

• PFA

• FEP

• Neoprene rubber

• Polyurethane rubber

The lining material should be selected according to temperature, pressure, and chemical compatibility.

11. What electrode materials are available?

Available electrode materials include:

• SS316L

• Hastelloy C

• Titanium

• Tantalum

• Platinum-Iridium

Material selection depends on the corrosiveness of the process fluid.

12. Can electromagnetic flowmeters measure corrosive liquids?

Yes. By selecting suitable lining and electrode materials, electromagnetic flowmeters can measure many corrosive liquids such as acids, alkalis, and salt solutions.

13. Can the flowmeter measure slurry or dirty liquids?

Yes. Since there are no obstruction parts inside the measuring tube, electromagnetic flowmeters are ideal for slurry, pulp, sewage, and particle-containing liquids.

14. Does the flowmeter require grounding?

Yes. Proper grounding is very important for stable and accurate measurement. Grounding rings or grounding electrodes may be required depending on the installation conditions.

15. What are the straight pipe requirements?

Typical installation recommendations:

• Upstream: 5D

• Downstream: 2D

(D = pipe diameter)

 

16. Can electromagnetic flowmeters measure bidirectional flow?

Yes. Most electromagnetic flowmeters support both forward and reverse flow measurement.

17. What protection ratings are available?

Typical protection grades include:

• IP65

• IP67

• IP68

IP68 is suitable for underground or submerged installations.

18. What is the operating temperature range?

The temperature range depends on the lining material. Typical ranges:

• Rubber lining: up to 80°C

• PTFE/PFA lining: up to 180°C

19. What is the power supply requirement?

Common power supply options:

• 24VDC

• 220VAC

20. How to select the correct electromagnetic flowmeter?

The following parameters are usually required:

• Liquid type

• Conductivity

• Flow range

• Pipe size

• Temperature

• Pressure

• Installation type

• Output signal

• Communication protocol

• Lining and electrode material requirements

21. What certifications are available?

Products can be supplied with certifications such as:

• ISO9001

• CE

• EAC

• ATEX

• IECEx

• SIL2

Depending on project requirements.

 

22. What is the difference between an electromagnetic flowmeter and a Coriolis flowmeter?

Electromagnetic flowmeters:

• Measure conductive liquids only

• Lower cost for large pipe sizes

• No pressure loss

• Ideal for water and wastewater

Coriolis flowmeters:

• Measure mass flow directly

• Higher accuracy

• Suitable for liquids and gases

• Better for custody transfer and high-value fluids

 

23. Can you provide OEM or customized services?

Yes. OEM branding, customized configuration, special materials, communication protocols, and project-based solutions are available.

 

24. What information is required for quotation?

Please provide:

• Medium name

• Pipe size

• Flow range

• Temperature

• Pressure

• Connection type

• Output signal

• Power supply

• Installation condition

• Quantity required

 

25. How long is the delivery time?

Standard models are typically available within 7-15 working days. Customized products may require additional production time depending on specifications.