Electronic circulate meters are industrial digital circulate meters used for fluid flow measurement. In many software situations, people often use digital flowmeter is electromagnetic flowmeter.
Electronic flowmeter types, corresponding to 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 electronic sign. This consists of pulse alerts, 4-20mA normal indicators, etc.
They aren’t absolutely electronic in nature, but they characterize a logical grouping of circulate measurement technologies. All of these meters haven’t any transferring elements. They perform through extremely subtle electronics and circuitry.
Table of Contents
What is an digital move meter?
Electronic move meter merchandise
Electronic flowmeter sorts and dealing principle
Electromagnetic circulate meter
Advantages of using electromagnetic flowmeter
Disadvantages of utilizing electromagnetic circulate meters
Vortex move meter
Ultrasonic move meter
Advantages of ultrasonic flowmeters
Disadvantages of ultrasonic move meters
How to choose your electronic flow meter?
What is an digital flow meter?
A circulate meter is a device used to measure the quantity or mass of a gasoline or liquid. Flow meters have many names depending on the precise industry, corresponding to move meters, circulate indicators, liquid meters, flow sensors, move meters, and so forth.
Electronic circulate meters are industrial digital flow meters used for liquid move measurement. Common kinds of electronic circulate meters are electromagnetic, vortex and ultrasonic flow 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 successful application to sophisticated digital sign processing.
Electronic move 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 dealing principle
Simply put, the working precept of digital flowmeter is to convert the flow rate of the measured fluid into an digital signal through the circulate sensor meeting. And can be move show and signal output. For instance, display instantaneous move, cumulative flow, etc. Roughly divided into the next three classes.
Electromagnetic circulate meter
Electromagnetic circulate meters work based mostly on Faraday’s precept of electromagnetic induction. Electromagnetic flowmeter is also referred to as 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 proper angles to the circulate and a pair of electrodes penetrate the pipe and its lining. When electrically conductive fluid flows through the pipe under the influence of a specific density magnetic area generated by the electromagnetic coil, the quantity 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 at the electrode
V = velocity of the fluid flowing by way of the pipe
K=calibration constant of the meter
Advantages of using electromagnetic flowmeter
High accuracy and stability
Self-checking
Bi-directional measurement
No strain loss
No shifting elements
Possible for hygienic functions
Available in massive sizes
Disadvantages of utilizing electromagnetic move meters
Cannot be used to measure gases, vapors and liquids containing massive quantities of fuel
Can not be used to measure liquid media with very low conductivity Electromagnetic flowmeter can’t measure media such as petroleum merchandise or organic solvents
Can not be used to measure high temperature media. Currently restricted by the general industrial electromagnetic flowmeter measuring tube lining supplies and electrical insulation supplies.
Electromagnetic flowmeter is susceptible to the influence of external electromagnetic interference.
Vortex flow meter
Vortex move meters are typically manufactured from 316 stainless-steel or Hastelloy and include a blunt physique, a vortex sensor meeting, and transmitter electronics. When a non-streamlined object (also referred to as an obtuse body) is positioned within the path of a excessive Reynolds quantity move, the fluid will alternately separate from the thing on its downstream sides and, as As the boundary layer separates and coils back on itself, the fluid varieties vortices. These vortices end in areas of pressure 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 following equation
V = (fxh)/S
Where
V = common velocity of the fluid circulate
f = frequency of the generated vortex
h = width of the obtuse body
S = number of Strouhal
S varies with Reynolds quantity; nonetheless, it is virtually fixed over a extensive range of circulate charges.
In practice, a k-factor representing the number of vortices generated per unit quantity is used as an alternative of S. Thus the volumetric flow fee is
Q = f/K
Vortex move meters aren’t typically recommended for dosing or different intermittent move applications. This is as a outcome of the drip move setting of the dosing station may be under the minimal Reynolds number limit of the meter. The smaller the total batch, the more significant the resulting error may be.
Low stress (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 vary and won’t be able to measure low circulate charges. On the opposite hand, if the lowered vary is acceptable and the meter is sized for regular move, then a vortex flowmeter should still be considered.
The permanent 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 flow rate and g is the gravitational fixed in consistent items.) If the piping and instrumentation are correctly sized and identical, the pressure drop could also be just a few kilos per sq. inch. However, downsizing (installing smaller than line size gauges) to increase the Reynolds number can enhance the head loss to greater than 10 psi. It can be necessary to ensure that the shrink strain is not decrease than the vapor pressure of the method fluid, as this could lead to cavitation. Naturally, if the again stress on the meter is lower than the steam strain, the method fluid will flash and the meter studying might be meaningless.
The major advantages of vortex move meters are their low sensitivity to modifications in course of circumstances and low put on relative to orifice or turbine flowmeters. In addition, preliminary and maintenance costs are very low. For these causes, they have 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 fixed, the time of passage (or reflection) of ultrasound can be used to determine 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 impacts the propagation of those sound waves, which can then be Then it may be measured to deduce the fluid velocity. There are two major forms of ultrasonic flowmeters: Doppler and transmission time. Both forms of ultrasonic flowmeters work by transmitting Both types of ultrasonic flow meters work by transmitting high-frequency sound waves into the fluid stream (incident pulse) and analyzing the obtained pulses.
Doppler flow meters utilize the Doppler effect, which is a frequency shift attributable to waves emitted or mirrored from a shifting object. Doppler circulate 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 rate based on the magnitude of that frequency shift.
In the design of a transit time ultrasonic flowmeter, the time of flight of the ultrasonic signal is measured between two transducers, one upstream and one downstream. With flow or The difference in time spent towards the circulate determines the fluid velocity from which the move price is inferred.
Advantages of ultrasonic flowmeters
The electronics within the ultrasonic flowmeter embrace an ultrasonic flowmeter detector that compensates and adapts to adjustments in fluid distribution, fluid type and pipe material.
Portable ultrasonic flowmeter converters can be used as a direct method of effectively figuring out circulate in comparison with different circulate methods.
Compared to different mechanical move meters, ultrasonic circulate meter converters are cheap to use and keep as a result of they don’t have any shifting elements in these circulate meters.
They are designed to be very exact and do not impede the circulate of liquids, to permit them to be used for sanitary, corrosive and abrasive liquids.
Disadvantages of ultrasonic move meters
The major disadvantage of ultrasonic flowmeters is price. Compared to different kinds of mechanical circulate meters, circulate meters are very pricey .
Compared to mechanical flow meters, ultrasonic flow meters are extra advanced and therefore require consultants to repair and keep the move meters.
How to choose your digital flow meter?
The essential components when selecting a right move meter device are
Media to be measured
Accuracy
Cost
Flow vary
Operating requirements
Maintenance
Lifetime
Delivery time
These factors are more or less interrelated. For instance – the price of a move meter will increase with accuracy and quality of life. Flowmeter calibration and maintenance are additionally important to consider.
More articles on flowmeters:
Chilled water move meter
Ultrasonic circulate meter working principle
Difference between move meter and flow transmitter
Working principle of rotameter
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Electronic flow meters are industrial digital circulate meters used for fluid circulate measurement. In many application situations, folks typically use electronic flowmeter is electromagnetic flowmeter.
Electronic flowmeter varieties, such as electromagnetic flowmeter, vortex flowmeter and ultrasonic flowmeter. Electronic flowmeter for industrial liquids, water, natural fuel, gasoline, gas, air. Electronic flowmeter converts the monitored fluid move into an digital sign. This includes pulse signals, 4-20mA normal signals, and so on.
They usually are not fully electronic in nature, however they symbolize a logical grouping of flow measurement technologies. All of those meters don’t have any moving elements. They perform through extremely refined electronics and circuitry.
Table of Contents
What is an electronic move meter?
Electronic circulate meter merchandise
Electronic flowmeter varieties and dealing precept
Electromagnetic flow meter
Advantages of using electromagnetic flowmeter
Disadvantages of using electromagnetic flow meters
Vortex move meter
Ultrasonic circulate meter
Advantages of ultrasonic flowmeters
Disadvantages of ultrasonic circulate meters
How to decide on your digital move meter?
What is an electronic move meter?
A move meter is a tool used to measure the volume or mass of a gasoline or liquid. Flow meters have many names relying on the specific trade, corresponding to circulate meters, flow indicators, liquid meters, circulate sensors, flow meters, and so on.
Electronic flow meters are industrial digital flow meters used for liquid flow measurement. Common forms of digital flow meters are electromagnetic, vortex and ultrasonic move meters.
Electromagnetic flowmeters are basically the most simple electrical flowmeters with a primary working principle derived from Faraday’s Law. Vortex flowmeters rely on piezoelectric sensors to detect vortex currents coming off a onerous and fast shedding bar. And ultrasonic flowmeters owe their successful utility to stylish digital signal processing.
Electronic move 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 dealing precept
Simply put, the working principle of electronic flowmeter is to convert the circulate price of the measured fluid into an electronic signal through the flow sensor assembly. And could be flow show and signal output. For example, display instantaneous flow, cumulative circulate, etc. Roughly divided into the following 3 categories.
Electromagnetic flow meter
Electromagnetic move 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 circulate meter consists of a non-magnetic pipe lined with an insulating materials. A pair of magnetic coils are positioned at right angles to the circulate and a pair of electrodes penetrate the pipe and its lining. When electrically conductive fluid flows via the pipe beneath the influence of a specific density magnetic subject generated by the electromagnetic coil, the quantity of voltage (E) generated across 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 via 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 shifting components
Possible for hygienic functions
Available in giant sizes
Disadvantages of utilizing 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 high temperature media. Currently restricted by the overall industrial electromagnetic flowmeter measuring tube lining supplies and electrical insulation materials.
Electromagnetic flowmeter is vulnerable to the influence of external electromagnetic interference.
Vortex circulate meter
Vortex flow meters are sometimes made from 316 stainless steel or Hastelloy and include a blunt body, a vortex sensor meeting, and transmitter electronics. When a non-streamlined object (also known as an obtuse body) is positioned within the path of a high Reynolds number flow, the fluid will alternately separate from the object on its downstream sides and, as As the boundary layer separates and coils back on itself, the fluid types vortices. These vortices lead to areas of stress fluctuations detected by piezoelectric or capacitive sensors. Fluid velocity is dependent upon 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 body
S = variety of Strouhal
S varies with Reynolds number; nonetheless, it’s virtually constant over a extensive range of circulate rates.
In practice, a k-factor representing the number of vortices generated per unit quantity is used instead of S. Thus the volumetric circulate fee is
Q = f/K
Vortex flow meters aren’t sometimes recommended for dosing or different intermittent circulate applications. เกจวัดแรงดัน is because the drip flow setting of the dosing station could also be below the minimal Reynolds quantity limit of the meter. The smaller the whole batch, the extra important the ensuing error could additionally be.
Low strain (low density) gases is not going to generate sturdy sufficient pressure pulses, particularly at low fluid velocities. Therefore, in this type of service, the gauge is prone to have a poor vary and won’t be able to measure low move charges. On the other hand, if the decreased vary is acceptable and the meter is sized for normal move, then a vortex flowmeter should be considered.
The permanent pressure loss through the vortex flowmeter is about half that of an orifice flowmeter with about two velocity heads. (Velocity head is defined as V2/g, where V is the circulate rate and g is the gravitational fixed in constant units.) If the piping and instrumentation are properly sized and equivalent, the pressure drop may be only some pounds per square inch. However, downsizing (installing smaller than line measurement gauges) to increase the Reynolds quantity can improve the top loss to more than 10 psi. It can be necessary to guarantee that the shrink strain isn’t lower than the vapor stress of the process fluid, as this will lead to cavitation. Naturally, if the back pressure on the meter is decrease than the steam strain, the method fluid will flash and the meter studying shall be meaningless.
The main advantages of vortex flow meters are their low sensitivity to adjustments in course of circumstances and low put on relative to orifice or turbine flowmeters. In addition, initial and maintenance prices are very low. For these reasons, they’ve gained wider acceptance amongst users.
Ultrasonic move meter
The pace of sound propagation in a fluid depends on the density of the fluid. However, if the density is constant, the time of passage (or reflection) of ultrasound can be used to find out the speed of the flowing fluid.
Ultrasonic move meters measure fluid velocity by transmitting high-frequency sound waves alongside the fluid move path. Fluid motion affects the propagation of those sound waves, which might then be Then it might be measured to deduce the fluid velocity. There are two major kinds of ultrasonic flowmeters: Doppler and transmission time. Both types of ultrasonic flowmeters work by transmitting Both types of ultrasonic move meters work by transmitting high-frequency sound waves into the fluid stream (incident pulse) and analyzing the obtained pulses.
Doppler circulate meters utilize the Doppler effect, which is a frequency shift brought on by waves emitted or mirrored from a transferring object. Doppler circulate meters replicate sound waves from bubbles or particles in the air stream Particulate materials in the reflection of sound waves, measuring the frequency shift and inferring the fluid velocity and thus the circulate fee primarily 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 distinction in time spent against the move determines the fluid velocity from which the move price is inferred.
Advantages of ultrasonic flowmeters
The electronics in the ultrasonic flowmeter embrace an ultrasonic flowmeter detector that compensates and adapts to modifications in fluid distribution, fluid kind and pipe materials.
Portable ultrasonic flowmeter converters can be used as a direct methodology of successfully determining circulate compared to other circulate systems.
Compared to different mechanical move meters, ultrasonic flow meter converters are inexpensive to make use of and preserve because they don’t have any shifting parts in these circulate meters.
They are designed to be very exact and do not impede the move of liquids, to permit them to be used for sanitary, corrosive and abrasive liquids.
Disadvantages of ultrasonic move meters
The main drawback of ultrasonic flowmeters is value. Compared to different forms of mechanical move meters, flow meters are very pricey .
Compared to mechanical flow meters, ultrasonic circulate meters are more complicated and due to this fact require experts to repair and preserve the flow meters.
How to choose on your electronic flow meter?
The important elements when choosing a proper flow meter system are
Media to be measured
Accuracy
Cost
Flow range
Operating necessities
Maintenance
Lifetime
Delivery time
These components are more or less interrelated. For example – the worth of a flow meter increases with accuracy and high quality of life. Flowmeter calibration and maintenance are additionally necessary to consider.
More articles on flowmeters:
Chilled water move meter
Ultrasonic move meter working precept
Difference between flow meter and flow transmitter
Working precept of rotameter