Water flow meters are required by national water agencies for brand spanking new and current agricultural irrigation purposes to measure and handle floor water and groundwater use. There is a growing must preserve assets and balance the water needs of agriculture with different industries, and as a end result of the population continues to develop, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the process irrigators use to find out the right frequency and period of watering. It entails understanding, applying after which monitoring and controlling the mandatory devices corresponding to soil moisture sensors, rain gauges and move meters to make sure environment friendly water use in crop production. This minimizes water waste and helps water conservation while maximizing crop well being and yield. Good irrigation planning practices include understanding how much water is used in every subject. A properly selected and put in flow meter accurately measures the amount of water utilized. Accurate flow meters are an important device for implementing a great irrigation program.
The two most typical types of irrigation flow meters are electromagnetic meters and propeller meters. Propeller meters are mechanical move meters that have been around in irrigation since 1919 and subsequently make up a large portion of the put in base of irrigation water meters. Fifteen years ago, many people thought that propeller meters have been one of the best meter selection for irrigation – that’s not the case at present. Expensive propeller meter repairs have led many meter users to look for different circulate measurement options. With advances in expertise, electromagnetic flowmeters at the second are obtainable for battery energy at remote irrigation areas. Many have lengthy battery life, high accuracy in tight spaces, and no moving parts to put on down; they’re unaffected by particles. Some electromagnetic flow meters are similar in value to mechanical propeller circulate meters.
Use the following four suggestions to assist select the proper circulate meter for irrigation.
Table of Contents

What is the application?

How important is accuracy?

What is your meter upkeep schedule?

Electromagnetic or mechanical?

What is the application?

Knowledge of the fluid medium, circulate vary, temperature, pressure, line size, desired signal output and obtainable set up space are all essential to make sure correct circulate meter selection.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While mechanical meters may be appropriate for clear water functions where the move range is within the meter’s functionality, electromagnetic meters supply the best accuracy and efficiency in both clear and soiled water functions. With no moving parts, weeds, trash and dust could turn out to be entangled within the mechanical meter and simply circulate by way of the magnetic meter.
What are the minimum and most move ranges? When selecting a mechanical propeller flow meter, it’s important to know the minimal and most circulate ranges. A propeller flow meter requires a minimum flow price to allow the bearing meeting and propeller to turn quick sufficient to make sure correct readings. If the move rate exceeds the mechanical meter’s score, the bearing meeting can suffer costly damage and the meter is not going to perform correctly. Because there aren’t any shifting elements to wear, electromagnetic flowmeters provide larger accuracy over a wider circulate range than mechanical meters.
What are the temperatures and pressures? Most flowmeters offered for this market are rated to function at temperatures as a lot as 150 psi and a hundred and forty F. Most of these purposes fall within that temperature and stress range. However, it is always wise to substantiate the applying temperature and pressure.
What is the dimensions of the line? This will assist decide the style 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 fashion may be the best choice for larger line sizes.
Does the meter require a signal output? Some applications require the instrument to send indicators such as pulses, 4-20mA, or Modbus. In some cases, the output is used to send a signal to a remote telemetry system, allowing the irrigator to collect meter data remotely. Signal outputs on propeller move meters are elective and often require the added value of a transmitter or particular digital register that can present the output. Most electromagnetic circulate meters have pulse sign output as a standard feature, making them “telemetry system ready” and might present Modbus or 4-20mA output signals for a small further value.
How much area is available to put in the meter? The straight pipe necessities for flow meters are costly in phrases of materials and installation labor. In the case of adding a model new move meter to an current facility, there’s often not enough space to accommodate the straight pipe sections required for correct circulate measurement. Mechanical propeller meters require more space to put in due to the longer straight run requirements to ensure proper and accurate performance. Straightening vanes or rectifiers may be mounted in entrance of the propeller meter to shorten the straight pipe requirement, but can significantly enhance the fee and set up labor involved. Typically, a regular full-bore electromagnetic flow meter will match nicely in tight spaces and measure flow accurately.
How essential is accuracy?

In basic, electromagnetic meters are extra correct than mechanical meters. Most electromagnetic circulate meters for irrigation provide +/-1% flow over a variety of circulate rates with no head loss. The commonest mechanical meter used in irrigation is the propeller move meter. Propeller meters sometimes provide +/-2% accuracy over a specified move vary and should experience some head loss. Because there aren’t any moving components to wear, electromagnetic meters can preserve accuracy all through the life of the meter.
What is your meter maintenance schedule?

As with most farm equipment, all irrigation move meters require consideration in some unspecified time in the future.
Mechanical propeller meters have transferring elements, such as propellers, bearings and mechanical registers, that can put on out, causing interruptions in measurement knowledge and resulting in expensive repairs. The number of parts for mechanical gauges has elevated dramatically over the years, and the price to repair a component is sort of as high as the fee to replace it. The standard warranty on most mechanical propeller gauges is one 12 months.
Electromagnetic meters do not have any breakable transferring elements and maintenance is often limited to changing the batteries. Many battery-powered electromagnetic flowmeters now offer a 5-year battery life, and the value of battery alternative is a fraction of the fee associated with typical mechanical meter repairs. In addition, most electromagnetic flowmeters come normal with a two- to five-year warranty, relying on the model.
Electromagnetic or mechanical?

Electromagnetic circulate meters – also called magnetic meters or simply electrometers – function according to Faraday’s Law – if a conductive fluid (such as irrigation water) passes via a magnetic area, a small voltage is generated. The motion of the conductive fluid by way of the sphere generates a small quantity of electrical power, similar to a generator (more flow = more voltage). An electron coil positioned on the surface of the fluid is immediately energized. The magnetic area passes via the fluid at right angles, the electrodes measure the altering voltage, and the display unit exhibits the rate and the entire. Electromagnetic flow meters have been around for 60 years, simply not for irrigation. They are usually used for municipal and industrial, water and wastewater functions. In the last 15 years or so, magnetometer technology has evolved so quickly that some can now be battery powered and are excellent for irrigation use. Most electromagnetic move meters come commonplace with many mechanical propeller flow meter options. Many instances, the general out-of-pocket price of an electromagnetic circulate meter might be less than the value of a mechanical propeller circulate meter. To ensure you get your money’s value, think about what you need out of your flowmeter – added pulse output, straightened vanes (for tight house installations), excessive capability bearing assemblies, digital readout, information logging and any other options which could be required with a mechanical propeller meter – and then compare the value to a battery-powered electromagnetic meter, which usually include all the choices you need as standard features. In the tip, electromagnetic flowmeters offer: higher accuracy over a wider move range, no moving elements to exchange, sturdiness, no circulate blockage, lengthy battery life, low upkeep costs, longer warranties, and minimal straight pipe necessities for tight space installations. In addition to full bore, some electromagnetic flowmeters are actually obtainable with saddle inserts for simple installation 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 known as propeller move meters or simply propeller circulate meters, operate in accordance with the following precept – A propeller flow meter consists of a rotating device, normally a spiral impeller, located within the air stream. The impeller rotates at a velocity proportional to the speed of the move. As the water flows via the pipe, it rotates the propeller. The rotational motion is then transmitted to the head of the meter by way of a gear or drive cable. The instantaneous and whole circulate charges may be learn on a mechanical or digital meter register. Although they work on the identical principle, these meters are available in a variety of mounting configurations to fulfill the wants of the installer: saddle, flange, threaded finish, grooved end, and so on., making set up easier. Propeller meters present an economical move metering answer when only mechanical move and total circulate are required. They usually work properly in clear water functions, however debris carrying water can injury transferring components. While mechanical propeller circulate meters were as quickly as probably the most economical choice for irrigation, that is often now not the case.
Apure is a designer and manufacturer of a variety of circulate metering, area instrumentation and course of analyzer merchandise. Since 2007, we have been offering innovative options for users in irrigation, water therapy, groundwater, surface water and chemical processing functions. Our products have a status for durability and accuracy at competitive costs and are sold by way of a community of home and international distributors. We employ just-in-time manufacturing strategies and are extremely committed to continuous improvement. Our concentrate on innovation, product worth and customer accessibility has led to almost 20 years of consistent development. Feel free to contact us for technical, citation or distributor support.
More articles on flowmeters:
Difference between flow meter and move transmitter

Flow meter calibration

Useful information about flow items

Mass flow fee vs volumetric move pricee
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Water circulate meters are required by nationwide water agencies for model spanking new and current agricultural irrigation purposes to measure and manage floor water and groundwater use. There is a growing need to preserve sources and steadiness the water needs of agriculture with different industries, and because the inhabitants continues to grow, residential use is driving water conservation in unprecedented ways.
Irrigation scheduling is the process irrigators use to determine the correct frequency and duration of watering. It involves understanding, making use of and then monitoring and controlling the necessary instruments similar to soil moisture sensors, rain gauges and circulate meters to make sure environment friendly water use in crop manufacturing. This minimizes water waste and supports water conservation while maximizing crop health and yield. Good irrigation planning practices embody figuring out how a lot water is used in each subject. A properly selected and installed flow meter precisely measures the amount of water applied. Accurate flow meters are an important device for implementing a great irrigation program.
The two most common forms of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate meters which were around in irrigation since 1919 and due to this fact make up a large portion of the installed base of irrigation water meters. Fifteen years in the past, many individuals thought that propeller meters were the best meter choice for irrigation – that is not the case right now. Expensive propeller meter repairs have led many meter users to look for different circulate measurement options. With advances in expertise, electromagnetic flowmeters at the second are obtainable for battery energy at distant irrigation locations. Many have lengthy battery life, excessive accuracy in tight spaces, and no transferring components to wear out; they’re unaffected by debris. Some electromagnetic move meters are comparable in value to mechanical propeller move meters.
Use the next four suggestions to assist select the best circulate meter for irrigation.
Table of Contents

What is the application?

How essential is accuracy?

What is your meter upkeep schedule?

pressure gauge octa or mechanical?

What is the application?

Knowledge of the fluid medium, circulate range, temperature, strain, line size, desired sign output and available set up area are all needed to ensure proper circulate meter selection.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While mechanical meters could also be suitable for clear water purposes where the circulate range is within the meter’s functionality, electromagnetic meters offer the best accuracy and performance in each clear and dirty water purposes. With no shifting components, weeds, trash and dirt might turn out to be entangled within the mechanical meter and simply circulate via the magnetic meter.
What are the minimal and maximum flow ranges? When choosing a mechanical propeller flow meter, it is crucial to know the minimal and most move ranges. A propeller move meter requires a minimal circulate fee to permit the bearing assembly and propeller to show quick enough to make sure accurate readings. If the move price exceeds the mechanical meter’s ranking, the bearing assembly can endure costly harm and the meter is not going to perform properly. Because there aren’t any moving components to put on, electromagnetic flowmeters present larger accuracy over a wider circulate vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters supplied for this market are rated to operate at temperatures up to one hundred fifty psi and one hundred forty F. Most of those purposes fall within that temperature and stress vary. However, it’s all the time wise to substantiate the applying temperature and stress.
What is the scale of the line? This will help decide the fashion of meter. Both electromagnetic and mechanical gauges are available in full bore and plug-in configurations. For price and ease of installation, the plug-in style may be the best choice for bigger line sizes.
Does the meter require a sign output? Some functions require the instrument to send 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 knowledge remotely. Signal outputs on propeller flow meters are optionally available and usually require the added price of a transmitter or special digital register that can provide the output. Most electromagnetic circulate meters have pulse signal output as a normal characteristic, making them “telemetry system ready” and might provide Modbus or 4-20mA output indicators for a small further value.
How a lot house is available to install 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 new move meter to an present facility, there’s typically not sufficient area to accommodate the straight pipe sections required for correct move measurement. Mechanical propeller meters require extra space to put in because of the longer straight run necessities to make sure correct and correct performance. Straightening vanes or rectifiers may be mounted in entrance of the propeller meter to shorten the straight pipe requirement, but can considerably improve the cost and installation labor concerned. Typically, a normal full-bore electromagnetic flow meter will fit properly in tight areas and measure circulate accurately.
How digital pressure gauge is accuracy?

In common, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic flow meters for irrigation present +/-1% circulate over a variety of flow charges with no head loss. The commonest mechanical meter used in irrigation is the propeller move meter. Propeller meters usually present +/-2% accuracy over a specified move vary and should expertise some head loss. Because there aren’t any transferring elements to put on, electromagnetic meters can preserve accuracy throughout the life of the meter.
What is your meter upkeep schedule?

As with most farm gear, all irrigation circulate meters require attention sooner or later.
Mechanical propeller meters have shifting components, such as propellers, bearings and mechanical registers, that can put on out, inflicting interruptions in measurement knowledge and leading to costly repairs. The number of components for mechanical gauges has increased dramatically through the years, and the price to repair an element is almost as excessive as the cost to switch it. The normal guarantee on most mechanical propeller gauges is one yr.
Electromagnetic meters wouldn’t have any breakable transferring components and maintenance is usually restricted to replacing the batteries. Many battery-powered electromagnetic flowmeters now provide a 5-year battery life, and the value of battery alternative is a fraction of the price related to typical mechanical meter repairs. In addition, most electromagnetic flowmeters come commonplace with a two- to five-year warranty, depending on the model.
Electromagnetic or mechanical?

Electromagnetic circulate meters – also recognized as magnetic meters or simply electrometers – operate in accordance with 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 through the sector generates a small amount of electrical power, similar to a generator (more flow = more voltage). An electron coil placed on the outside of the fluid is instantly energized. The magnetic field passes via the fluid at proper angles, the electrodes measure the altering voltage, and the display unit shows the rate and the total. Electromagnetic flow meters have been around for 60 years, just not for irrigation. They are usually used for municipal and industrial, water and wastewater applications. In the last 15 years or so, magnetometer know-how has evolved so rapidly that some can now be battery powered and are excellent for irrigation use. Most electromagnetic move meters come standard with many mechanical propeller flow meter choices. Many occasions, the overall out-of-pocket value of an electromagnetic flow meter might be lower than the value of a mechanical propeller circulate meter. To make certain you get your money’s price, think about what you want out of your flowmeter – added pulse output, straightened vanes (for tight space installations), excessive capacity bearing assemblies, digital readout, information logging and another choices that might be required with a mechanical propeller meter – and then compare the value to a battery-powered electromagnetic meter, which typically embrace all the choices you need as standard options. In the end, electromagnetic flowmeters offer: higher accuracy over a wider circulate range, no shifting components to replace, sturdiness, no flow blockage, lengthy battery life, low maintenance costs, longer warranties, and minimum straight pipe necessities for tight space installations. In addition to full bore, some electromagnetic flowmeters are now available with saddle inserts for straightforward 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 generally recognized as propeller flow meters or simply propeller flow meters, function in accordance with the following principle – A propeller circulate meter consists of a rotating system, usually a spiral impeller, located within the air stream. The impeller rotates at a velocity proportional to the rate of the flow. As the water flows via the pipe, it rotates the propeller. The rotational motion is then transmitted to the top of the meter through a gear or drive cable. The instantaneous and total flow charges may be learn on a mechanical or digital meter register. Although they work on the same 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 installation simpler. Propeller meters present a cost-effective circulate metering solution when only mechanical move and total move are required. They usually work properly in clear water purposes, but debris carrying water can damage moving components. While mechanical propeller flow meters were as quickly as the most economical choice for irrigation, this is usually no longer the case.
Apure is a designer and producer of a variety of move metering, field instrumentation and course of analyzer products. Since 2007, we’ve been offering innovative options for customers in irrigation, water treatment, groundwater, surface water and chemical processing functions. Our merchandise have a popularity for sturdiness and accuracy at aggressive costs and are offered by way of a network of domestic and international distributors. We make use of just-in-time manufacturing strategies and are highly committed to continuous enchancment. Our give consideration to innovation, product worth and customer accessibility has led to just about two decades of consistent development. Feel free to contact us for technical, citation or distributor support.
More articles on flowmeters:
Difference between move meter and circulate transmitter

Flow meter calibration

Useful details about move items

Mass circulate fee vs volumetric circulate feee