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Water circulate meters are required by national water companies for model spanking new and existing agricultural irrigation purposes to measure and handle surface water and groundwater use. There is a rising need to preserve sources and stability the water wants of agriculture with different industries, and as a outcome of the population continues to grow, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the method irrigators use to determine the proper frequency and period of watering. It involves understanding, making use of and then monitoring and controlling the mandatory instruments such as soil moisture sensors, rain gauges and move meters to make sure environment friendly water use in crop production. This minimizes water waste and supports water conservation while maximizing crop well being and yield. Good irrigation planning practices embrace knowing how a lot water is used in every field. A correctly chosen and put in flow meter precisely measures the amount of water utilized. Accurate flow meters are an essential device for implementing a great irrigation program.
The two commonest types of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate meters that have been round in irrigation since 1919 and due to this fact make up a big portion of the installed base of irrigation water meters. Fifteen years ago, many individuals thought that propeller meters have been the most effective meter alternative for irrigation – that’s not the case right now. Expensive propeller meter repairs have led many meter users to search for other circulate measurement choices. With advances in know-how, electromagnetic flowmeters are actually available for battery power at distant irrigation locations. Many have lengthy battery life, excessive accuracy in tight areas, and no shifting parts to put on down; they’re unaffected by particles. Some electromagnetic circulate meters are similar in value to mechanical propeller flow meters.
Use the next four suggestions to assist choose the right circulate meter for irrigation.
Table of Contents

What is the application?

How essential is accuracy?

What is your meter upkeep schedule?

Electromagnetic or mechanical?

What is the application?

Knowledge of the fluid medium, circulate range, temperature, stress, line dimension, desired sign output and out there set up house are all needed to ensure correct circulate meter selection.
What is the application? Is it groundwater, surface water, pond water or manure slurry lagoon water? While mechanical meters could additionally be appropriate for clear water purposes the place the flow range is within the meter’s capability, electromagnetic meters offer the highest accuracy and efficiency in each clear and soiled water functions. With no moving elements, weeds, trash and dust might become entangled within the mechanical meter and easily move through the magnetic meter.
What are the minimum and maximum flow ranges? When selecting a mechanical propeller flow meter, it’s important to know the minimal and most move ranges. A propeller move meter requires a minimal circulate rate to permit the bearing meeting and propeller to turn fast sufficient to ensure correct readings. If the circulate rate exceeds the mechanical meter’s rating, the bearing meeting can endure costly damage and the meter will not perform correctly. Because there aren’t any moving elements to wear, electromagnetic flowmeters present higher accuracy over a wider flow range than mechanical meters.
What are the temperatures and pressures? Most flowmeters offered for this market are rated to function at temperatures as much as one hundred fifty psi and one hundred forty F. Most of these functions fall inside that temperature and pressure range. However, it is all the time clever to confirm the applying temperature and pressure.
What is the size of the line? This will assist determine the style of meter. Both electromagnetic and mechanical gauges can be found in full bore and plug-in configurations. For value and ease of installation, the plug-in style could additionally be the only option for larger line sizes.
Does the meter require a signal output? Some purposes require the instrument to ship indicators similar to pulses, 4-20mA, or Modbus. In some cases, the output is used to send a signal to a remote telemetry system, permitting the irrigator to gather meter data remotely. Signal outputs on propeller move meters are optional and often require the added price of a transmitter or particular digital register that can present the output. Most electromagnetic move meters have pulse sign output as a regular function, making them “telemetry system ready” and can present Modbus or 4-20mA output signals for a small extra cost.
How much house is on the market to install the meter? The straight pipe requirements for flow meters are costly in terms of supplies and set up labor. In the case of including a model new circulate meter to an present facility, there is typically not sufficient space to accommodate the straight pipe sections required for correct circulate measurement. Mechanical propeller meters require more space to install as a outcome of longer straight run necessities to make sure correct and accurate performance. Straightening vanes or rectifiers could be mounted in entrance of the propeller meter to shorten the straight pipe requirement, however can considerably improve the fee and set up labor involved. Typically, a normal full-bore electromagnetic move meter will match properly in tight areas and measure move precisely.
How important is accuracy?

In common, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic circulate meters for irrigation present +/-1% move over a variety of move charges with no head loss. The commonest mechanical meter used in irrigation is the propeller flow meter. Propeller meters sometimes present +/-2% accuracy over a specified flow vary and should experience some head loss. Because there are no shifting components to put on, electromagnetic meters can maintain accuracy throughout the lifetime of the meter.
What is your meter upkeep schedule?

As with most farm tools, all irrigation circulate meters require consideration in some unspecified time within the future.
Mechanical propeller meters have moving elements, corresponding to propellers, bearings and mechanical registers, that may wear out, causing interruptions in measurement knowledge and resulting in costly repairs. The variety of components for mechanical gauges has elevated dramatically over time, and the fee to restore an element is sort of as high as the cost to exchange it. The normal guarantee on most mechanical propeller gauges is one 12 months.
Electromagnetic meters don’t have any breakable shifting components and upkeep is often restricted to changing the batteries. Many battery-powered electromagnetic flowmeters now supply a 5-year battery life, and the price of battery alternative is a fraction of the fee related to typical mechanical meter repairs. In addition, most electromagnetic flowmeters come standard with a two- to five-year guarantee, relying on the brand.
Electromagnetic or mechanical?

Electromagnetic flow meters – also referred to as magnetic meters or simply electrometers – operate based on Faraday’s Law – if a conductive fluid (such as irrigation water) passes through a magnetic field, a small voltage is generated. The motion of the conductive fluid via the field generates a small amount of electrical vitality, just like a generator (more flow = extra voltage). An electron coil positioned on the surface of the fluid is immediately energized. The magnetic subject passes through the fluid at right angles, the electrodes measure the changing voltage, and the display unit shows the speed and the whole. Electromagnetic circulate meters have been round for 60 years, just not for irrigation. They are sometimes used for municipal and industrial, water and wastewater functions. In the last 15 years or so, magnetometer know-how has developed so rapidly that some can now be battery powered and are good for irrigation use. Most electromagnetic flow meters come commonplace with many mechanical propeller circulate meter options. Many occasions, the general out-of-pocket value of an electromagnetic flow meter will be less than the price of a mechanical propeller flow meter. To ensure you get your money’s value, think about what you want from your flowmeter – added pulse output, straightened vanes (for tight house installations), high capacity bearing assemblies, digital readout, information logging and another choices that could be required with a mechanical propeller meter – after which examine the value to a battery-powered electromagnetic meter, which usually embrace all of the choices you want as normal features. In the top, electromagnetic flowmeters supply: higher accuracy over a wider flow vary, no transferring components to replace, sturdiness, no flow blockage, long battery life, low maintenance prices, longer warranties, and minimal straight pipe requirements for tight area installations. In addition to full bore, some electromagnetic flowmeters are actually out there with saddle inserts for straightforward set up in new installations and retrofit/replacement of existing saddle propeller meters.
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

Mechanical Propeller Meters – Also generally recognized as propeller move meters or simply propeller move meters, operate in accordance with the next principle – A propeller flow meter consists of a rotating gadget, normally a spiral impeller, situated in the air stream. The impeller rotates at a speed proportional to the velocity of the circulate. As the water flows via the pipe, it rotates the propeller. The rotational movement is then transmitted to the top of the meter via a gear or drive cable. The instantaneous and whole move charges could be read on a mechanical or digital meter register. Although they work on the identical principle, these meters are available in a big selection of mounting configurations to satisfy the wants of the installer: saddle, flange, threaded finish, grooved end, and so on., making set up easier. Propeller meters provide a cheap circulate metering resolution when only mechanical move and complete move are required. They usually work nicely in clear water applications, but debris carrying water can damage shifting components. While mechanical propeller flow meters had been as quickly as the most economical possibility for irrigation, that is usually now not the case.
Apure is a designer and manufacturer of a extensive range of circulate metering, subject instrumentation and course of analyzer products. Since 2007, we have been offering innovative options for customers in irrigation, water therapy, groundwater, floor water and chemical processing applications. Our merchandise have a status for durability and accuracy at aggressive costs and are bought via a network of home and international distributors. We employ just-in-time manufacturing methods and are extremely dedicated to continuous improvement. Our focus on innovation, product worth and customer accessibility has led to nearly 20 years of constant progress. Feel free to contact us for technical, citation or distributor help.
More articles on flowmeters:
Difference between move meter and circulate transmitter

Flow meter calibration

Useful information about move models

Mass circulate fee vs volumetric move feee
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Water circulate meters are required by national water businesses for brand spanking new and existing agricultural irrigation applications to measure and handle floor water and groundwater use. There is a growing must conserve sources and balance the water needs of agriculture with other industries, and as the population continues to grow, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the method irrigators use to determine the right frequency and period of watering. It includes understanding, making use of after which monitoring and controlling the necessary instruments such as soil moisture sensors, rain gauges and flow meters to make sure efficient water use in crop manufacturing. This minimizes water waste and helps water conservation whereas maximizing crop health and yield. Good irrigation planning practices include figuring out how a lot water is used in every area. A correctly chosen and put in move meter precisely measures the amount of water utilized. Accurate move meters are an necessary software for implementing a great irrigation program.
The two most typical types of irrigation move meters are electromagnetic meters and propeller meters. Propeller meters are mechanical move meters which have been around in irrigation since 1919 and subsequently make up a big portion of the installed base of irrigation water meters. Fifteen years in the past, many individuals thought that propeller meters have been the most effective meter choice for irrigation – that is not the case right now. Expensive propeller meter repairs have led many meter users to look for other circulate measurement options. With advances in technology, electromagnetic flowmeters at the moment are obtainable for battery power at distant irrigation places. Many have long battery life, high accuracy in tight areas, and no moving parts to wear out; they’re unaffected by debris. Some electromagnetic flow meters are related in price to mechanical propeller move meters.
Use the following 4 ideas to help choose the best circulate meter for irrigation.
Table of Contents

What is the application?

How necessary is accuracy?

What is your meter maintenance schedule?

Electromagnetic or mechanical?

What is the application?

Knowledge of the fluid medium, circulate range, temperature, strain, line dimension, desired signal output and available installation area are all essential to ensure correct flow meter selection.
What is the application? Is it groundwater, surface water, pond water or manure slurry lagoon water? While mechanical meters could additionally be suitable for clear water functions the place the move range is within the meter’s capability, electromagnetic meters provide the very best accuracy and performance in each clear and soiled water functions. With no transferring parts, weeds, trash and dust may turn out to be entangled in the mechanical meter and easily circulate by way of the magnetic meter.
What are the minimal and maximum move ranges? When selecting a mechanical propeller flow meter, it’s critical to know the minimum and maximum circulate ranges. A propeller move meter requires a minimal circulate fee to permit the bearing meeting and propeller to turn quick sufficient to make sure accurate readings. If the circulate fee exceeds the mechanical meter’s ranking, the bearing assembly can undergo costly injury and the meter will not operate properly. Because there aren’t any shifting elements to wear, electromagnetic flowmeters provide larger accuracy over a wider move vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters supplied for this market are rated to operate at temperatures up to 150 psi and 140 F. Most of those functions fall within that temperature and stress range. However, it is at all times sensible to confirm the appliance temperature and stress.
What is the scale of the line? This will help decide the fashion of meter. Both electromagnetic and mechanical gauges can be found in full bore and plug-in configurations. For price and ease of installation, the plug-in type may be your greatest option for bigger line sizes.
Does the meter require a sign output? Some purposes require the instrument to send alerts corresponding to pulses, 4-20mA, or Modbus. In some cases, the output is used to ship a signal to a remote telemetry system, allowing the irrigator to gather meter knowledge remotely. Signal outputs on propeller circulate meters are elective and normally require the added cost of a transmitter or special digital register that may provide the output. Most electromagnetic flow meters have pulse signal output as a regular function, making them “telemetry system ready” and can provide Modbus or 4-20mA output indicators for a small extra value.
How much area is on the market to put in the meter? The straight pipe necessities for circulate meters are expensive by method of supplies and set up labor. In the case of adding a brand new flow meter to an present facility, there may be often not enough area to accommodate the straight pipe sections required for accurate flow measurement. Mechanical propeller meters require more room to install due to the longer straight run necessities to ensure proper and correct performance. Straightening vanes or rectifiers can be mounted in front of the propeller meter to shorten the straight pipe requirement, however can significantly enhance the price and installation labor involved. Typically, a regular full-bore electromagnetic flow meter will match nicely in tight spaces and measure flow precisely.
How necessary is accuracy?

In common, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic circulate meters for irrigation provide +/-1% circulate over a wide range of circulate charges with no head loss. The commonest mechanical meter used in irrigation is the propeller circulate meter. Propeller meters usually present +/-2% accuracy over a specified circulate vary and will expertise some head loss. Because there are not any transferring components to wear, electromagnetic meters can maintain accuracy all through the lifetime of the meter.
What is your meter upkeep schedule?

As with most farm tools, all irrigation circulate meters require consideration at some point.
Mechanical propeller meters have transferring parts, such as propellers, bearings and mechanical registers, that can wear out, inflicting interruptions in measurement data and resulting in expensive repairs. The variety of components for mechanical gauges has increased dramatically through the years, and the fee to repair a part is sort of as excessive as the price to replace it. The standard guarantee on most mechanical propeller gauges is one year.
Electromagnetic meters wouldn’t have any breakable transferring elements and upkeep is often limited to changing the batteries. Many battery-powered electromagnetic flowmeters now supply a 5-year battery life, and the cost of battery replacement is a fraction of the cost associated with typical mechanical meter repairs. In addition, most electromagnetic flowmeters come commonplace with a two- to five-year guarantee, depending on the model.
Electromagnetic or mechanical?

Electromagnetic flow meters – also called magnetic meters or just electrometers – operate according to Faraday’s Law – if a conductive fluid (such as irrigation water) passes through a magnetic field, a small voltage is generated. The movement of the conductive fluid by way of the field generates a small amount of electrical energy, similar to a generator (more flow = extra voltage). An electron coil positioned on the skin of the fluid is instantly energized. The magnetic field passes via the fluid at right angles, the electrodes measure the changing voltage, and the show unit reveals the rate and the whole. Electromagnetic move meters have been around for 60 years, just not for irrigation. They are typically used for municipal and industrial, water and wastewater purposes. In the final 15 years or so, magnetometer expertise has evolved so quickly that some can now be battery powered and are good for irrigation use. Most electromagnetic circulate meters come normal with many mechanical propeller circulate meter options. Many occasions, the overall out-of-pocket value of an electromagnetic flow meter shall be lower than the value of a mechanical propeller move meter. To ensure diaphragm seal get your money’s price, contemplate what you want out of your flowmeter – added pulse output, straightened vanes (for tight house installations), high capability bearing assemblies, digital readout, data logging and some other choices that could be required with a mechanical propeller meter – after which evaluate the worth to a battery-powered electromagnetic meter, which typically embody all the choices you need as standard features. In the top, electromagnetic flowmeters offer: greater accuracy over a wider circulate range, no transferring components to exchange, sturdiness, no circulate blockage, long battery life, low maintenance costs, longer warranties, and minimum straight pipe requirements for tight area installations. In addition to full bore, some electromagnetic flowmeters are now out there with saddle inserts for easy installation in new installations and retrofit/replacement of present saddle propeller meters.
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

Mechanical Propeller Meters – Also known as propeller circulate meters or simply propeller move meters, function in accordance with the next precept – A propeller circulate meter consists of a rotating device, often a spiral impeller, situated within the air stream. The impeller rotates at a pace proportional to the speed of the move. As the water flows by way of the pipe, it rotates the propeller. The rotational movement is then transmitted to the pinnacle of the meter by way of a gear or drive cable. The instantaneous and total flow charges may be read on a mechanical or digital meter register. Although they work on the same principle, these meters are available in quite so much of mounting configurations to satisfy the wants of the installer: saddle, flange, threaded finish, grooved end, and so on., making installation simpler. Propeller meters provide a cheap move metering solution when only mechanical flow and whole circulate are required. They sometimes work well in clear water applications, but debris carrying water can harm shifting components. While mechanical propeller move meters were as quickly as the most economical possibility for irrigation, this is usually now not the case.
Apure is a designer and producer of a variety of circulate metering, area instrumentation and course of analyzer merchandise. Since 2007, we’ve been providing revolutionary options for customers in irrigation, water therapy, groundwater, floor water and chemical processing applications. Our products have a reputation for sturdiness and accuracy at aggressive costs and are sold via a network of home and worldwide distributors. We employ just-in-time manufacturing strategies and are highly dedicated to continuous enchancment. Our focus on innovation, product value and customer accessibility has led to just about 20 years of constant growth. Feel free to contact us for technical, citation or distributor assist.
More articles on flowmeters:
Difference between move meter and flow transmitter

Flow meter calibration

Useful information about circulate units

Mass circulate rate vs volumetric circulate feee