Electronic move meters are industrial digital circulate meters used for fluid circulate measurement. In many application scenarios, people usually use digital flowmeter is electromagnetic flowmeter.
Electronic flowmeter varieties, such as electromagnetic flowmeter, vortex flowmeter and ultrasonic flowmeter. Electronic flowmeter for industrial liquids, water, natural gas, gasoline, gas, air. Electronic flowmeter converts the monitored fluid flow into an digital signal. This consists of pulse signals, 4-20mA standard alerts, and so forth.
They usually are not absolutely electronic in nature, but they represent a logical grouping of flow measurement technologies. All of these meters have no transferring elements. They function through extremely refined electronics and circuitry.
Table of Contents
What is an digital circulate meter?
Electronic move meter merchandise
Electronic flowmeter sorts and working principle
Electromagnetic flow meter
Advantages of using electromagnetic flowmeter
Disadvantages of utilizing electromagnetic circulate meters
Vortex flow meter
Ultrasonic move meter
Advantages of ultrasonic flowmeters
Disadvantages of ultrasonic move meters
How to determine on your digital circulate meter?
What is an electronic circulate meter?
A flow meter is a tool used to measure the quantity or mass of a gas or liquid. Flow meters have many names depending on the particular trade, similar to circulate meters, move indicators, liquid meters, flow sensors, circulate meters, and so on.
Electronic flow meters are industrial digital move meters used for liquid flow measurement. Common forms of electronic move meters are electromagnetic, vortex and ultrasonic move meters.
Electromagnetic flowmeters are essentially probably the most straightforward electrical flowmeters with a first operating precept derived from Faraday’s Law. Vortex flowmeters rely on piezoelectric sensors to detect vortex currents coming off a fixed shedding bar. And ultrasonic flowmeters owe their profitable software to stylish digital sign processing.
Electronic flow meter merchandise
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 sorts and dealing principle
Simply put, the working precept of electronic flowmeter is to convert the flow price of the measured fluid into an digital signal through the move sensor assembly. And may be flow display and signal output. For instance, show instantaneous move, cumulative move, etc. Roughly divided into the next 3 categories.
Electromagnetic flow meter
Electromagnetic flow meters work based mostly on Faraday’s principle of electromagnetic induction. Electromagnetic flowmeter is also referred to as only conductive fluid can be used.
Magnetic move meter consists of a non-magnetic pipe lined with an insulating material. A pair of magnetic coils are positioned at proper angles to the flow and a pair of electrodes penetrate the pipe and its lining. When electrically conductive fluid flows through the pipe underneath the influence of a specific density magnetic subject generated by the electromagnetic coil, the amount of voltage (E) generated throughout the electrodes is predicted by Faraday’s regulation to be proportional to velocity (V) proportional to the liquid.
E = KV
Where
E = the quantity of voltage generated on the electrode
V = velocity of the fluid flowing via the pipe
K=calibration constant of the meter
Advantages of utilizing electromagnetic flowmeter
High accuracy and stability
Self-checking
Bi-directional measurement
No pressure loss
No moving elements
Possible for hygienic purposes
Available in large sizes
Disadvantages of using electromagnetic circulate 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 not measure media similar to petroleum products or organic solvents
Can not be used to measure high temperature media. Currently restricted by the general industrial electromagnetic flowmeter measuring tube lining materials and electrical insulation supplies.
Electromagnetic flowmeter is prone to the affect of exterior electromagnetic interference.
Vortex circulate meter
Vortex flow meters are typically made of 316 chrome steel or Hastelloy and include a blunt physique, a vortex sensor assembly, and transmitter electronics. When a non-streamlined object (also referred to as an obtuse body) is placed within the path of a high Reynolds quantity flow, the fluid will alternately separate from the item on its downstream sides and, as As the boundary layer separates and coils again on itself, the fluid varieties vortices. These vortices lead to 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 = average 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; however, it’s almost fixed over a variety of circulate charges.
In apply, a k-factor representing the number of vortices generated per unit volume is used as an alternative of S. Thus the volumetric flow rate is
Q = f/K
Vortex move meters usually are not typically recommended for dosing or other intermittent circulate purposes. This is because the drip move setting of the dosing station could additionally be under the minimal Reynolds number limit of the meter. The smaller the entire batch, the more important the resulting error may be.
Low strain (low density) gases is not going to generate sturdy enough stress pulses, particularly at low fluid velocities. Therefore, in this type of service, the gauge is likely to have a poor range and won’t be able to measure low circulate rates. On the other hand, if the lowered range is suitable and the meter is sized for regular flow, then a vortex flowmeter should be thought of.
The permanent 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, where V is the move rate and g is the gravitational constant in consistent units.) If the piping and instrumentation are correctly sized and similar, the stress drop could additionally be only a few pounds per sq. inch. However, downsizing (installing smaller than line dimension gauges) to increase the Reynolds number can increase the head loss to more than 10 psi. It can be essential to guarantee that the shrink pressure is not decrease than the vapor pressure of the process fluid, as this will lead to cavitation. Naturally, if the back stress on the meter is lower than the steam pressure, the process fluid will flash and the meter reading shall be meaningless.
The main advantages of vortex move meters are their low sensitivity to changes in course of conditions and low put on relative to orifice or turbine flowmeters. In addition, initial and maintenance prices are very low. For these reasons, they have gained wider acceptance amongst users.
Ultrasonic flow meter
The pace of sound propagation in a fluid is decided 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 velocity of the flowing fluid.
Ultrasonic move meters measure fluid velocity by transmitting high-frequency sound waves along the fluid circulate path. Fluid motion impacts the propagation of those sound waves, which can then be Then it may be measured to infer the fluid velocity. There are two major forms of ultrasonic flowmeters: Doppler and transmission time. Both forms of ultrasonic flowmeters work by transmitting Both kinds of ultrasonic flow meters work by transmitting high-frequency sound waves into the fluid stream (incident pulse) and analyzing the acquired pulses.
Doppler circulate meters make the most of the Doppler impact, which is a frequency shift attributable to waves emitted or mirrored from a shifting object. Doppler move meters replicate sound waves from bubbles or particles within the air stream Particulate materials within the reflection of sound waves, measuring the frequency shift and inferring the fluid velocity and thus the flow 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 in opposition to the circulate determines the fluid velocity from which the move price is inferred.
Advantages of ultrasonic flowmeters
The electronics in the ultrasonic flowmeter embody an ultrasonic flowmeter detector that compensates and adapts to adjustments in fluid distribution, fluid sort and pipe material.
Portable ultrasonic flowmeter converters can be used as a direct methodology of effectively figuring out flow in comparability with different circulate techniques.
Compared to other mechanical move meters, ultrasonic flow meter converters are cheap to make use of and preserve as a result of they have no shifting elements in these move meters.
They are designed to be very exact and do not impede the flow of liquids, so they can be used for sanitary, corrosive and abrasive liquids.
Disadvantages of ultrasonic flow meters
The major disadvantage of ultrasonic flowmeters is cost. Compared to different kinds of mechanical flow meters, circulate meters are very costly .
Compared to mechanical move meters, ultrasonic flow meters are extra complex and therefore require specialists to repair and preserve the flow meters.
How to choose your electronic circulate meter?
The essential elements when selecting a proper flow meter system are
Media to be measured
Accuracy
Cost
Flow vary
Operating requirements
Maintenance
Lifetime
Delivery time
These components are kind of interrelated. For instance – the price of a move meter increases with accuracy and quality of life. Flowmeter calibration and maintenance are additionally important to consider.
More articles on flowmeters:
Chilled water flow meter
Ultrasonic flow meter working precept
Difference between move meter and circulate transmitter
Working precept of rotameter
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Electronic flow meters are industrial digital flow meters used for fluid circulate measurement. In many utility situations, individuals typically 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 gasoline, gasoline, gas, air. Electronic flowmeter converts the monitored fluid move into an digital sign. This includes pulse signals, 4-20mA standard indicators, and so forth.
They are not fully electronic in nature, however they characterize a logical grouping of circulate measurement applied sciences. All of those meters don’t have any moving components. They operate via extremely refined electronics and circuitry.
Table of Contents
What is an digital move meter?
Electronic circulate meter merchandise
Electronic flowmeter sorts and dealing principle
Electromagnetic circulate meter
Advantages of utilizing electromagnetic flowmeter
Disadvantages of using electromagnetic move meters
Vortex flow meter
Ultrasonic flow meter
Advantages of ultrasonic flowmeters
Disadvantages of ultrasonic flow meters
How to decide on your digital flow meter?
What is an digital flow meter?
A move meter is a tool used to measure the amount or mass of a gas or liquid. Flow meters have many names relying on the precise trade, such as circulate meters, move indicators, liquid meters, circulate sensors, flow meters, and so on.
Electronic circulate meters are industrial digital move meters used for liquid circulate measurement. Common types of electronic flow meters are electromagnetic, vortex and ultrasonic flow meters.
Electromagnetic flowmeters are essentially essentially the most easy electrical flowmeters with a primary working principle derived from Faraday’s Law. Vortex flowmeters depend on piezoelectric sensors to detect vortex currents coming off a set shedding bar. And ultrasonic flowmeters owe their profitable application to sophisticated 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 sorts and working principle
Simply put, the working precept of electronic flowmeter is to convert the circulate fee of the measured fluid into an digital sign via the circulate sensor assembly. And may be flow show and sign output. For instance, show instantaneous flow, cumulative flow, and so forth. Roughly divided into the next 3 categories.
Electromagnetic move meter
Electromagnetic circulate meters work primarily based on Faraday’s principle of electromagnetic induction. Electromagnetic flowmeter is also recognized as solely conductive fluid can be utilized.
Magnetic flow meter consists of a non-magnetic pipe lined with an insulating material. A pair of magnetic coils are positioned at proper angles to the move and a pair of electrodes penetrate the pipe and its lining. When electrically conductive fluid flows through the pipe underneath the influence of a selected density magnetic field generated by the electromagnetic coil, the amount of voltage (E) generated across the electrodes is predicted by Faraday’s regulation to be proportional to velocity (V) proportional to the liquid.
E = KV
Where
E = the quantity of voltage generated at the electrode
V = velocity of the fluid flowing via the pipe
K=calibration fixed of the meter
Advantages of utilizing electromagnetic flowmeter
High accuracy and stability
Self-checking
Bi-directional measurement
No stress loss
No transferring components
Possible for hygienic functions
Available in large sizes
Disadvantages of using electromagnetic circulate meters
Cannot be used to measure gases, vapors and liquids containing giant amounts of fuel
Can not be used to measure liquid media with very low conductivity Electromagnetic flowmeter can’t measure media similar to petroleum merchandise or organic solvents
Can not be used to measure excessive temperature media. Currently restricted by the general industrial electromagnetic flowmeter measuring tube lining materials and electrical insulation supplies.
Electromagnetic flowmeter is vulnerable to the influence of exterior electromagnetic interference.
Vortex flow meter
Vortex move meters are usually manufactured from 316 chrome 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 within the path of a high Reynolds quantity circulate, the fluid will alternately separate from the item on its downstream sides and, as As the boundary layer separates and coils back on itself, the fluid varieties vortices. These vortices lead to areas of pressure fluctuations detected by piezoelectric or capacitive sensors. Fluid velocity depends on the frequency of the generated vortices and the Strouhal number and is given by the next 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 virtually constant over a broad range of flow rates.
In apply, a k-factor representing the variety of vortices generated per unit quantity is used as a substitute of S. Thus the volumetric flow price is
Q = f/K
Vortex circulate meters are not usually really helpful for dosing or other intermittent flow purposes. This is as a outcome of the drip flow setting of the dosing station could additionally be below the minimum Reynolds quantity restrict of the meter. The smaller the whole batch, the more important the ensuing error could additionally be.
Low stress (low density) gases won’t generate strong sufficient stress pulses, especially at low fluid velocities. Therefore, in this kind of service, the gauge is more doubtless to have a poor range and will be unable to measure low circulate rates. On the other hand, if the reduced vary is suitable and the meter is sized for regular circulate, then a vortex flowmeter should be considered.
The everlasting strain 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 circulate fee and g is the gravitational constant in constant items.) If the piping and instrumentation are correctly sized and similar, the stress drop could also be only some pounds per sq. inch. However, downsizing (installing smaller than line dimension gauges) to increase the Reynolds quantity can enhance the head loss to greater than 10 psi. It can be essential to guarantee that the shrink pressure just isn’t decrease than the vapor pressure of the process fluid, as this could result in cavitation. Naturally, if the back pressure on the meter is lower than the steam stress, the process fluid will flash and the meter studying might be meaningless.
The primary advantages of vortex circulate meters are their low sensitivity to modifications in process situations and low wear relative to orifice or turbine flowmeters. In addition, preliminary and upkeep costs are very low. For these causes, they’ve gained wider acceptance among customers.
Ultrasonic circulate meter
The pace of sound propagation in a fluid is decided by the density of the fluid. However, if the density is constant, the time of passage (or reflection) of ultrasound can be utilized to discover out the rate of the flowing fluid.
Ultrasonic flow meters measure fluid velocity by transmitting high-frequency sound waves along the fluid move path. Fluid motion affects the propagation of these sound waves, which might then be Then it could be measured to infer the fluid velocity. There are two primary kinds of ultrasonic flowmeters: Doppler and transmission time. Both forms of ultrasonic flowmeters work by transmitting Both forms of ultrasonic circulate meters work by transmitting high-frequency sound waves into the fluid stream (incident pulse) and analyzing the obtained pulses.
Doppler move 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 reflect sound waves from bubbles or particles within the air stream Particulate materials in the reflection of sound waves, measuring the frequency shift and inferring the fluid velocity and thus the flow price 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 flow or The difference in time spent towards the flow determines the fluid velocity from which the flow fee is inferred.
Advantages of ultrasonic flowmeters
The electronics within the ultrasonic flowmeter include an ultrasonic flowmeter detector that compensates and adapts to changes in fluid distribution, fluid kind and pipe material.
Portable ultrasonic flowmeter converters can be used as a direct method of effectively figuring out flow compared to different circulate systems.
Compared to different mechanical move meters, ultrasonic move meter converters are cheap to make use of and keep as a outcome of they haven’t any transferring components in these flow meters.
They are designed to be very precise and don’t impede the circulate of liquids, so they can be used for sanitary, corrosive and abrasive liquids.
Disadvantages of ultrasonic flow meters
The primary disadvantage of ultrasonic flowmeters is cost. Compared to other forms of mechanical flow meters, flow meters are very pricey .
Compared to mechanical circulate meters, ultrasonic move meters are more complex and therefore require consultants to repair and preserve the move meters.
How to choose your digital circulate meter?
ชนิดของpressuregauge when choosing a right move meter system are
Media to be measured
Accuracy
Cost
Flow range
Operating requirements
Maintenance
Lifetime
Delivery time
These elements are roughly interrelated. For example – the cost of a move meter increases with accuracy and high quality of life. Flowmeter calibration and maintenance are also necessary to consider.
More articles on flowmeters:
Chilled water flow meter
Ultrasonic circulate meter working precept
Difference between move meter and move transmitter
Working precept of rotameter