Electronic flow meters are industrial digital circulate meters used for fluid move measurement. In many software situations, folks usually use electronic flowmeter is electromagnetic flowmeter.
Electronic flowmeter sorts, corresponding to electromagnetic flowmeter, vortex flowmeter and ultrasonic flowmeter. Electronic flowmeter for industrial liquids, water, natural gas, gasoline, fuel, air. Electronic flowmeter converts the monitored fluid flow into an electronic sign. This consists of pulse signals, 4-20mA standard signals, and so on.
They usually are not absolutely digital in nature, but they characterize a logical grouping of move measurement applied sciences. All of these meters don’t have any shifting components. They perform through extremely subtle electronics and circuitry.
Table of Contents
What is an electronic move meter?
Electronic flow meter products
Electronic flowmeter sorts and dealing principle
Electromagnetic circulate meter
Advantages of utilizing electromagnetic flowmeter
Disadvantages of utilizing electromagnetic flow meters
Vortex flow meter
Ultrasonic flow meter
Advantages of ultrasonic flowmeters
Disadvantages of ultrasonic circulate meters
How to choose your digital circulate meter?
What is an digital flow meter?
A move meter is a device used to measure the amount or mass of a gasoline or liquid. Flow meters have many names relying on the specific industry, similar to flow meters, flow indicators, liquid meters, circulate sensors, move meters, etc.
Electronic move meters are industrial digital flow meters used for liquid circulate measurement. Common kinds of electronic flow meters are electromagnetic, vortex and ultrasonic circulate meters.
Electromagnetic flowmeters are primarily essentially the most simple electrical flowmeters with a first operating precept derived from Faraday’s Law. Vortex flowmeters depend on piezoelectric sensors to detect vortex currents coming off a hard and fast shedding bar. And ultrasonic flowmeters owe their profitable software to classy digital sign processing.
Electronic flow meter products
AYT Digital Liquid Magnetic Flow Meter
Learn More AYT Digital Liquid Magnetic Flow Meter
AFT Split Type Electromagnetic Flow Meter
Learn More AFT Split Type Electromagnetic Flow Meter
ACT Insertion Type Magnetic Flowmeter
Learn More ACT Insertion Type Magnetic Flowmeter
AQT Steam Vortex Flow Meter
Learn More AQT Steam Vortex Flow Meter
TUF Clamp On Ultrasonic Flow Meter
Learn More TUF Clamp On Ultrasonic Flow Meter
MHC Portable Ultrasonic Doppler Flow Meter
Learn More MHC Portable Ultrasonic Doppler Flow Meter
Electronic flowmeter types and working principle
Simply put, the working principle of electronic flowmeter is to transform the flow rate of the measured fluid into an electronic sign via the flow sensor assembly. And could be flow show and signal output. For example, display instantaneous flow, cumulative move, etc. Roughly divided into the following 3 categories.
Electromagnetic circulate meter
Electromagnetic circulate meters work primarily based on Faraday’s precept of electromagnetic induction. Electromagnetic flowmeter is also called solely conductive fluid can be used.
Magnetic flow meter consists of a non-magnetic pipe lined with an insulating material. A pair of magnetic coils are positioned at right angles to the flow and a pair of electrodes penetrate the pipe and its lining. When electrically conductive fluid flows via the pipe under the influence of a particular density magnetic subject generated by the electromagnetic coil, the amount of voltage (E) generated throughout the electrodes is predicted by Faraday’s law to be proportional to velocity (V) proportional to the liquid.
E = KV
Where
E = the amount of voltage generated on the electrode
V = velocity of the fluid flowing through the pipe
K=calibration constant of the meter
Advantages of using electromagnetic flowmeter
High accuracy and stability
Self-checking
Bi-directional measurement
No stress loss
No moving parts
Possible for hygienic functions
Available in giant sizes
Disadvantages of utilizing electromagnetic move meters
Cannot be used to measure gases, vapors and liquids containing large quantities of gas
Can not be used to measure liquid media with very low conductivity Electromagnetic flowmeter can’t measure media such as petroleum products or organic solvents
Can not be used to measure excessive temperature media. Currently restricted by the overall industrial electromagnetic flowmeter measuring tube lining materials and electrical insulation materials.
Electromagnetic flowmeter is vulnerable to the affect of external electromagnetic interference.
Vortex move meter
Vortex flow meters are usually manufactured from 316 stainless-steel or Hastelloy and embrace a blunt physique, a vortex sensor assembly, and transmitter electronics. When a non-streamlined object (also known as an obtuse body) is positioned in the path of a excessive Reynolds quantity flow, the fluid will alternately separate from the object on its downstream sides and, as As the boundary layer separates and coils again on itself, the fluid types vortices. These vortices result in areas of stress fluctuations detected by piezoelectric or capacitive sensors. Fluid velocity is dependent upon the frequency of the generated vortices and the Strouhal quantity and is given by the following equation
V = (fxh)/S
Where
V = average velocity of the fluid circulate
f = frequency of the generated vortex
h = width of the obtuse physique
S = number of Strouhal
S varies with Reynolds number; however, it’s nearly fixed over a extensive range of flow rates.
In apply, a k-factor representing the variety of vortices generated per unit quantity is used as an alternative of S. Thus the volumetric move price is
Q = f/K
Vortex flow meters aren’t usually recommended for dosing or other intermittent circulate purposes. This is as a end result of the drip move setting of the dosing station may be below the minimal Reynolds quantity limit of the meter. The smaller the whole batch, the more significant the resulting error may be.
Low stress (low density) gases will not generate robust sufficient stress pulses, especially at low fluid velocities. Therefore, in this type of service, the gauge is more doubtless to have a poor range and will be unable to measure low move rates. On the other hand, if the lowered vary is suitable and the meter is sized for normal circulate, then a vortex flowmeter should still be thought-about.
The everlasting pressure loss by way of the vortex flowmeter is about half that of an orifice flowmeter with about two velocity heads. (Velocity head is outlined as V2/g, the place V is the move fee and g is the gravitational constant in consistent models.) If the piping and instrumentation are correctly sized and equivalent, the pressure drop could additionally be just a few pounds per square inch. However, downsizing (installing smaller than line size gauges) to increase the Reynolds quantity can improve the top loss to more than 10 psi. It can additionally be important to guarantee that the shrink strain is not decrease than the vapor stress of the process fluid, as this will result in cavitation. Naturally, if the back pressure on the meter is decrease than the steam pressure, the method fluid will flash and the meter reading might be meaningless.
The major advantages of vortex move meters are their low sensitivity to modifications in process situations and low put on relative to orifice or turbine flowmeters. In addition, initial and upkeep costs are very low. For these reasons, they have gained wider acceptance amongst customers.
Ultrasonic circulate meter
The pace of sound propagation in a fluid is dependent upon the density of the fluid. However, if the density is fixed, the time of passage (or reflection) of ultrasound can be used to discover out the velocity of the flowing fluid.
Ultrasonic flow meters measure fluid velocity by transmitting high-frequency sound waves alongside the fluid flow path. Fluid motion impacts the propagation of these sound waves, which may then be Then it can be measured to deduce the fluid velocity. There are two main forms of ultrasonic flowmeters: Doppler and transmission time. Both kinds of ultrasonic flowmeters work by transmitting Both kinds of ultrasonic circulate meters work by transmitting high-frequency sound waves into the fluid stream (incident pulse) and analyzing the received pulses.
Doppler flow meters make the most of the Doppler impact, which is a frequency shift attributable to waves emitted or reflected from a transferring object. Doppler flow meters replicate sound waves from bubbles or particles in the air stream Particulate materials within the reflection of sound waves, measuring the frequency shift and inferring the fluid velocity and thus the move price based on the magnitude of that frequency shift.
In the design of a transit time ultrasonic flowmeter, the time of flight of the ultrasonic sign is measured between two transducers, one upstream and one downstream. With circulate or The difference in time spent against the move determines the fluid velocity from which the move price is inferred.
Advantages of ultrasonic flowmeters
The electronics within the ultrasonic flowmeter embody an ultrasonic flowmeter detector that compensates and adapts to changes in fluid distribution, fluid type and pipe material.
Portable ultrasonic flowmeter converters can be used as a direct methodology of successfully determining circulate in comparability with other flow systems.
Compared to other mechanical flow meters, ultrasonic move meter converters are inexpensive to use and maintain because they haven’t any moving parts in these move meters.
They are designed to be very precise and don’t impede the move of liquids, to permit them to be used for sanitary, corrosive and abrasive liquids.
Disadvantages of ultrasonic flow meters
The primary disadvantage of ultrasonic flowmeters is value. Compared to different forms of mechanical flow meters, flow meters are very pricey .
Compared to mechanical move meters, ultrasonic move meters are extra complex and subsequently require consultants to repair and keep the flow meters.
How to choose on your electronic move meter?
The essential factors when selecting a proper circulate meter system are
Media to be measured
Accuracy
Cost
Flow vary
Operating necessities
Maintenance
Lifetime
Delivery time
These factors are kind of interrelated. For example – the worth of a move meter increases with accuracy and high quality of life. Flowmeter calibration and maintenance are also necessary to think about.
More articles on flowmeters:
Chilled water flow meter
Ultrasonic circulate meter working principle
Difference between circulate meter and circulate transmitter
Working precept of rotameter
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Electronic circulate meters are industrial digital move meters used for fluid circulate measurement. In many software scenarios, individuals typically use electronic flowmeter is electromagnetic flowmeter.
Electronic flowmeter types, corresponding to electromagnetic flowmeter, vortex flowmeter and ultrasonic flowmeter. Electronic flowmeter for industrial liquids, water, pure gasoline, gasoline, gasoline, air. Electronic flowmeter converts the monitored fluid move into an digital signal. This consists of pulse alerts, 4-20mA commonplace indicators, etc.
They are not fully electronic in nature, however they represent a logical grouping of flow measurement technologies. All of those meters haven’t any moving elements. They operate by way of highly subtle electronics and circuitry.
เกจวัดแรงดันอากาศ of Contents
What is an digital move meter?
Electronic circulate meter products
Electronic flowmeter varieties and working precept
Electromagnetic circulate meter
Advantages of using electromagnetic flowmeter
Disadvantages of utilizing electromagnetic flow meters
Vortex flow meter
Ultrasonic flow meter
Advantages of ultrasonic flowmeters
Disadvantages of ultrasonic move meters
How to choose your digital move meter?
What is an digital circulate meter?
A flow meter is a tool used to measure the amount or mass of a fuel or liquid. Flow meters have many names relying on the precise industry, such as circulate meters, flow indicators, liquid meters, move sensors, flow meters, etc.
Electronic circulate meters are industrial digital flow meters used for liquid circulate measurement. Common forms of digital move meters are electromagnetic, vortex and ultrasonic flow meters.
Electromagnetic flowmeters are basically the most straightforward electrical flowmeters with a first working principle derived from Faraday’s Law. Vortex flowmeters depend on piezoelectric sensors to detect vortex currents coming off a fixed shedding bar. And ultrasonic flowmeters owe their successful software to stylish digital signal processing.
Electronic flow meter products
AYT Digital Liquid Magnetic Flow Meter
Learn More AYT Digital Liquid Magnetic Flow Meter
AFT Split Type Electromagnetic Flow Meter
Learn More AFT Split Type Electromagnetic Flow Meter
ACT Insertion Type Magnetic Flowmeter
Learn More ACT Insertion Type Magnetic Flowmeter
AQT Steam Vortex Flow Meter
Learn More AQT Steam Vortex Flow Meter
TUF Clamp On Ultrasonic Flow Meter
Learn More TUF Clamp On Ultrasonic Flow Meter
MHC Portable Ultrasonic Doppler Flow Meter
Learn More MHC Portable Ultrasonic Doppler Flow Meter
Electronic flowmeter varieties and working principle
Simply put, the working precept of electronic flowmeter is to transform the circulate price of the measured fluid into an digital signal via the circulate sensor meeting. And may be flow show and signal output. For example, display instantaneous circulate, cumulative move, and so forth. Roughly divided into the following three categories.
Electromagnetic flow meter
Electromagnetic move meters work primarily based on Faraday’s principle of electromagnetic induction. Electromagnetic flowmeter is also called only conductive fluid can be utilized.
Magnetic flow meter consists of a non-magnetic pipe lined with an insulating materials. A pair of magnetic coils are positioned at right angles to the flow and a pair of electrodes penetrate the pipe and its lining. When electrically conductive fluid flows by way of the pipe under the affect of a selected density magnetic subject generated by the electromagnetic coil, the amount of voltage (E) generated across the electrodes is predicted by Faraday’s legislation to be proportional to velocity (V) proportional to the liquid.
E = KV
Where
E = the amount of voltage generated at the electrode
V = velocity of the fluid flowing via the pipe
K=calibration fixed of the meter
Advantages of using electromagnetic flowmeter
High accuracy and stability
Self-checking
Bi-directional measurement
No strain loss
No moving components
Possible for hygienic functions
Available in large sizes
Disadvantages of using electromagnetic flow meters
Cannot be used to measure gases, vapors and liquids containing large quantities of gas
Can not be used to measure liquid media with very low conductivity Electromagnetic flowmeter can’t measure media such as petroleum products or organic solvents
Can not be used to measure excessive temperature media. Currently restricted by the overall industrial electromagnetic flowmeter measuring tube lining supplies and electrical insulation supplies.
Electromagnetic flowmeter is prone to the influence of exterior electromagnetic interference.
Vortex flow meter
Vortex circulate meters are sometimes manufactured from 316 stainless steel or Hastelloy and include a blunt body, a vortex sensor assembly, and transmitter electronics. When a non-streamlined object (also referred to as an obtuse body) is positioned in the path of a excessive Reynolds number circulate, the fluid will alternately separate from the object on its downstream sides and, as As the boundary layer separates and coils again on itself, the fluid forms vortices. These vortices end in areas of strain fluctuations detected by piezoelectric or capacitive sensors. Fluid velocity is determined by the frequency of the generated vortices and the Strouhal number and is given by the next equation
V = (fxh)/S
Where
V = common velocity of the fluid move
f = frequency of the generated vortex
h = width of the obtuse physique
S = variety of Strouhal
S varies with Reynolds number; nevertheless, it’s nearly fixed over a variety of move rates.
In apply, a k-factor representing the variety of vortices generated per unit volume is used as a substitute of S. Thus the volumetric circulate fee is
Q = f/K
Vortex flow meters usually are not sometimes recommended for dosing or other intermittent move applications. This is as a result of the drip move setting of the dosing station may be under the minimal Reynolds quantity limit of the meter. The smaller the total batch, the extra important the ensuing error may be.
Low stress (low density) gases won’t generate robust enough strain pulses, especially at low fluid velocities. Therefore, in this sort of service, the gauge is likely to have a poor range and will be unable to measure low flow charges. On the opposite hand, if the reduced vary is appropriate and the meter is sized for regular circulate, then a vortex flowmeter should still be considered.
The everlasting strain loss via the vortex flowmeter is about half that of an orifice flowmeter with about two velocity heads. (Velocity head is defined as V2/g, the place V is the move fee and g is the gravitational fixed in consistent items.) If the piping and instrumentation are properly sized and similar, the strain drop may be only some kilos per square inch. However, downsizing (installing smaller than line measurement gauges) to increase the Reynolds number can enhance the head loss to greater than 10 psi. It can be essential to ensure that the shrink stress isn’t decrease than the vapor strain of the process fluid, as this will lead to cavitation. Naturally, if the back pressure on the meter is lower than the steam pressure, the method fluid will flash and the meter studying shall be meaningless.
The primary benefits of vortex move meters are their low sensitivity to modifications in course of situations and low put on relative to orifice or turbine flowmeters. In addition, initial and upkeep costs are very low. For these reasons, they’ve gained wider acceptance amongst customers.
Ultrasonic circulate meter
The speed of sound propagation in a fluid is determined by the density of the fluid. However, if the density is fixed, the time of passage (or reflection) of ultrasound can be utilized to determine the speed of the flowing fluid.
Ultrasonic circulate meters measure fluid velocity by transmitting high-frequency sound waves alongside the fluid move path. Fluid movement affects the propagation of these sound waves, which can then be Then it could be measured to deduce the fluid velocity. There are two primary forms of ultrasonic flowmeters: Doppler and transmission time. Both kinds of ultrasonic flowmeters work by transmitting Both kinds of ultrasonic circulate meters work by transmitting high-frequency sound waves into the fluid stream (incident pulse) and analyzing the acquired pulses.
Doppler move meters utilize the Doppler effect, which is a frequency shift caused by waves emitted or mirrored from a shifting object. Doppler flow meters reflect sound waves from bubbles or particles in the air stream Particulate material in the reflection of sound waves, measuring the frequency shift and inferring the fluid velocity and thus the move rate based mostly on the magnitude of that frequency shift.
In the design of a transit time ultrasonic flowmeter, the time of flight of the ultrasonic sign is measured between two transducers, one upstream and one downstream. With move or The distinction in time spent against the flow determines the fluid velocity from which the flow rate is inferred.
Advantages of ultrasonic flowmeters
The electronics in the ultrasonic flowmeter embody an ultrasonic flowmeter detector that compensates and adapts to modifications in fluid distribution, fluid type and pipe materials.
Portable ultrasonic flowmeter converters can be used as a direct methodology of successfully determining move compared to different flow systems.
Compared to different mechanical flow meters, ultrasonic circulate meter converters are inexpensive to use and keep as a outcome of they don’t have any moving parts in these flow meters.
They are designed to be very exact and do not impede the flow of liquids, to permit them to be used for sanitary, corrosive and abrasive liquids.
Disadvantages of ultrasonic circulate meters
The major disadvantage of ultrasonic flowmeters is price. Compared to different forms of mechanical circulate meters, move meters are very expensive .
Compared to mechanical circulate meters, ultrasonic move meters are extra complex and due to this fact require specialists to restore and keep the circulate meters.
How to choose your electronic circulate meter?
The essential components when choosing a proper move meter system are
Media to be measured
Accuracy
Cost
Flow range
Operating requirements
Maintenance
Lifetime
Delivery time
These components are more or less interrelated. For example – the cost of a circulate meter will increase with accuracy and high quality of life. Flowmeter calibration and upkeep are also important to contemplate.
More articles on flowmeters:
Chilled water circulate meter
Ultrasonic move meter working principle
Difference between circulate meter and move transmitter
Working principle of rotameter