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Select right irrigation flow meter

Water circulate meters are required by national water businesses for model spanking new and present agricultural irrigation functions to measure and handle floor water and groundwater use. There is a growing have to preserve resources and balance the water needs of agriculture with different industries, and as 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 period of watering. It involves understanding, applying after which monitoring and controlling the required instruments similar to soil moisture sensors, rain gauges and move meters to make sure efficient water use in crop manufacturing. This minimizes water waste and helps water conservation whereas maximizing crop well being and yield. Good irrigation planning practices embrace understanding how a lot water is utilized in each subject. A properly selected and installed circulate meter accurately measures the amount of water utilized. Accurate flow meters are an essential software for implementing an excellent irrigation program.
The two most common kinds 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 big portion of the put in base of irrigation water meters. Fifteen years ago, many people thought that propeller meters have been the best meter alternative for irrigation – that is not the case today. Expensive propeller meter repairs have led many meter customers to search for different move measurement options. With advances in technology, electromagnetic flowmeters at the second are out there for battery power at distant irrigation locations. Many have lengthy battery life, high accuracy in tight areas, and no shifting parts to put on out; they are unaffected by debris. Some electromagnetic move meters are comparable in value to mechanical propeller flow meters.
Use the following 4 tips to assist select the right flow 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 vary, temperature, stress, line measurement, desired signal output and obtainable installation area are all necessary to make sure proper flow meter selection.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While mechanical meters could additionally be appropriate for clear water functions where the circulate vary is inside the meter’s functionality, electromagnetic meters offer the best accuracy and performance in each clear and soiled water applications. With no transferring elements, weeds, trash and dust could turn out to be entangled in the mechanical meter and simply move through the magnetic meter.
What are the minimal and maximum flow ranges? When deciding on a mechanical propeller flow meter, it is important to know the minimum and maximum flow ranges. A propeller circulate meter requires a minimum circulate price to permit the bearing meeting and propeller to show quick sufficient to ensure accurate readings. If the flow fee exceeds the mechanical meter’s ranking, the bearing meeting can endure costly injury and the meter will not operate correctly. Because there are no transferring elements to put on, electromagnetic flowmeters present greater accuracy over a wider move range than mechanical meters.
What are the temperatures and pressures? Most flowmeters supplied for this market are rated to operate at temperatures as much as one hundred fifty psi and one hundred forty F. Most of these applications fall inside that temperature and pressure vary. However, it is at all times wise to verify the application temperature and strain.
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 only option for larger line sizes.
Does the meter require a sign output? Some functions require the instrument to send indicators corresponding to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to send a sign to a remote telemetry system, allowing the irrigator to gather meter data remotely. Signal outputs on propeller flow meters are optionally available and usually require the added cost of a transmitter or special digital register that can present the output. Most electromagnetic flow meters have pulse signal output as a standard characteristic, making them “telemetry system ready” and may provide Modbus or 4-20mA output signals for a small additional value.
How a lot space is out there to put in the meter? The straight pipe necessities for circulate meters are expensive when it comes to supplies and set up labor. In the case of including a brand new flow meter to an existing facility, there is often not enough space to accommodate the straight pipe sections required for accurate flow measurement. Mechanical propeller meters require more room to install because of the longer straight run necessities to ensure correct and correct performance. Straightening vanes or rectifiers can be mounted in front of the propeller meter to shorten the straight pipe requirement, but can significantly enhance the fee and installation labor involved. Typically, a normal full-bore electromagnetic move meter will match well in tight areas and measure circulate accurately.
How important is accuracy?

In common, electromagnetic meters are more correct than mechanical meters. Most electromagnetic circulate meters for irrigation present +/-1% move over a variety of move charges with no head loss. The most typical mechanical meter utilized in irrigation is the propeller move meter. Propeller meters typically provide +/-2% accuracy over a specified flow range and should expertise some head loss. Because there are no moving elements to put on, electromagnetic meters can keep accuracy all through the lifetime of the meter.
What is your meter maintenance schedule?

As with most farm gear, all irrigation flow meters require consideration in some unspecified time within the future.
Mechanical propeller meters have shifting components, such as propellers, bearings and mechanical registers, that can wear out, causing interruptions in measurement knowledge and leading to pricey repairs. The number of elements for mechanical gauges has increased dramatically through the years, and the price to restore a component is kind of as excessive as the fee to replace it. The normal guarantee on most mechanical propeller gauges is one 12 months.
Electromagnetic meters do not have any breakable transferring components and upkeep is normally restricted to replacing the batteries. Many battery-powered electromagnetic flowmeters now provide a 5-year battery life, and the value of battery substitute 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, depending on the brand.
Electromagnetic or mechanical?

Electromagnetic flow meters – also referred to as magnetic meters or just electrometers – function based on Faraday’s Law – if a conductive fluid (such as irrigation water) passes through a magnetic area, a small voltage is generated. The movement of the conductive fluid through the sphere generates a small amount of electrical power, just like a generator (more circulate = more voltage). An electron coil placed on the skin of the fluid is instantly energized. The magnetic area passes via the fluid at proper angles, the electrodes measure the altering voltage, and the display unit reveals the rate and the total. Electromagnetic circulate meters have been round 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 know-how has developed so shortly 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 occasions, the general out-of-pocket value of an electromagnetic flow meter shall be lower than the worth of a mechanical propeller flow meter. To make certain you get your money’s worth, think about what you need from your flowmeter – added pulse output, straightened vanes (for tight space installations), high capacity bearing assemblies, digital readout, data logging and some other options which could be required with a mechanical propeller meter – and then examine the price to a battery-powered electromagnetic meter, which generally embody all the choices you need as standard options. In the end, electromagnetic flowmeters supply: greater accuracy over a wider flow range, no moving components to replace, sturdiness, no flow blockage, lengthy battery life, low upkeep costs, longer warranties, and minimal straight pipe necessities for tight house installations. In addition to full bore, some electromagnetic flowmeters are actually available 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 generally recognized as propeller move meters or just propeller circulate meters, operate in accordance with the following principle – A propeller circulate meter consists of a rotating device, often a spiral impeller, positioned in the air stream. The impeller rotates at a velocity proportional to the rate of the flow. As the water flows through the pipe, it rotates the propeller. The rotational motion is then transmitted to the top of the meter via a gear or drive cable. The instantaneous and complete circulate rates could be read on a mechanical or digital meter register. Although they work on the identical precept, these meters are available in a selection of mounting configurations to fulfill the wants of the installer: saddle, flange, threaded finish, grooved finish, and so on., making set up easier. Propeller meters provide a cost-effective move metering answer when only mechanical move and whole circulate are required. They usually work nicely in clear water purposes, however debris carrying water can injury shifting elements. While mechanical propeller flow meters had been once the most economical option for irrigation, this is often not the case.
Apure is a designer and producer of a broad range of flow metering, subject instrumentation and process analyzer products. Since 2007, we now have been providing progressive options for users in irrigation, water therapy, groundwater, surface water and chemical processing functions. Our products have a reputation for sturdiness and accuracy at aggressive costs and are bought via a community of home and international distributors. We employ just-in-time manufacturing strategies and are extremely dedicated to steady enchancment. Our concentrate on innovation, product worth and customer accessibility has led to just about 20 years of consistent growth. Feel free to contact us for technical, quotation or distributor assist.
More articles on flowmeters:
Difference between flow meter and flow transmitter

Flow meter calibration

Useful information about move units

Mass move price vs volumetric flow ratee
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Water move meters are required by nationwide water companies for model spanking new and current agricultural irrigation functions to measure and manage surface water and groundwater use. There is a rising have to conserve assets 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 method irrigators use to determine the correct frequency and duration of watering. It includes understanding, applying after which monitoring and controlling the required devices similar to soil moisture sensors, rain gauges and circulate meters to make sure efficient water use in crop manufacturing. This minimizes water waste and supports water conservation whereas maximizing crop well being and yield. Good irrigation planning practices embrace understanding how a lot water is utilized in every subject. A correctly selected and installed flow meter precisely measures the amount of water utilized. Accurate flow meters are an essential tool for implementing a great irrigation program.
The two commonest 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 therefore make up a big portion of the put in base of irrigation water meters. Fifteen years in the past, many individuals thought that propeller meters have been one of the best meter alternative for irrigation – that’s not the case at present. Expensive propeller meter repairs have led many meter customers to search for other move measurement choices. With advances in know-how, electromagnetic flowmeters are now out there for battery power at remote irrigation areas. Many have long battery life, high accuracy in tight spaces, and no shifting parts to put on down; they are unaffected by particles. Some electromagnetic circulate meters are similar in price to mechanical propeller circulate meters.
Use the following four tips to help choose the best circulate meter for irrigation.
Table of Contents

What is the application?

How necessary is accuracy?

What is your meter upkeep schedule?

Electromagnetic or mechanical?

What is the application?

Knowledge of the fluid medium, circulate range, temperature, pressure, line size, desired sign output and available installation house are all essential to make sure proper flow meter selection.
What is the application? Is it groundwater, surface water, pond water or manure slurry lagoon water? While mechanical meters may be appropriate for clear water functions the place the move vary is within the meter’s capability, electromagnetic meters offer the very best accuracy and efficiency in each clear and dirty water functions. With no transferring elements, weeds, trash and mud could turn into entangled within the mechanical meter and easily move by way of the magnetic meter.
What are the minimum and maximum flow ranges? When selecting a mechanical propeller flow meter, it is important to know the minimum and maximum flow ranges. A propeller flow meter requires a minimal move price to permit the bearing assembly and propeller to turn fast enough to ensure correct readings. If the circulate rate exceeds the mechanical meter’s ranking, the bearing meeting can endure expensive injury and the meter is not going to operate properly. Because there aren’t any transferring parts to put on, electromagnetic flowmeters provide higher accuracy over a wider circulate range than mechanical meters.
What are the temperatures and pressures? Most flowmeters offered for this market are rated to operate at temperatures as much as a hundred and fifty psi and 140 F. Most of these functions fall within that temperature and strain vary. However, it’s always wise to substantiate the application temperature and stress.
What is the dimensions of the line? This will help 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 greatest choice for larger line sizes.
Does the meter require a signal output? Some functions require the instrument to send alerts similar to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to send a sign to a remote telemetry system, allowing the irrigator to gather meter information remotely. Signal outputs on propeller move meters are optional and usually require the added price of a transmitter or particular digital register that may provide the output. Most electromagnetic flow meters have pulse signal output as a regular feature, making them “telemetry system ready” and may present Modbus or 4-20mA output indicators for a small extra cost.
How much house is available to put in the meter? The straight pipe necessities for move meters are costly by way of materials and installation labor. In the case of including a brand new flow meter to an current facility, there’s typically not enough space to accommodate the straight pipe sections required for accurate move measurement. Mechanical propeller meters require more space to put in because of the longer straight run requirements to make sure proper and accurate efficiency. Straightening vanes or rectifiers could be mounted in entrance of the propeller meter to shorten the straight pipe requirement, however can significantly improve the cost and set up labor concerned. Typically, a normal full-bore electromagnetic circulate meter will match nicely in tight spaces and measure circulate precisely.
How necessary is accuracy?

In basic, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic flow meters for irrigation provide +/-1% circulate over a wide range of circulate rates with no head loss. The commonest mechanical meter utilized in irrigation is the propeller flow meter. Propeller meters sometimes present +/-2% accuracy over a specified flow vary and may expertise some head loss. Because there aren’t any shifting parts to put on, electromagnetic meters can maintain accuracy all through the life of the meter.
What is your meter upkeep schedule?

As with most farm equipment, all irrigation circulate meters require consideration in some unspecified time within the future.
Mechanical propeller meters have shifting components, similar to propellers, bearings and mechanical registers, that can wear out, causing interruptions in measurement information and leading to costly repairs. The variety of components for mechanical gauges has increased dramatically over time, and the fee to restore a part is nearly as high as the cost to replace it. The normal warranty on most mechanical propeller gauges is one 12 months.
Electromagnetic meters don’t have any breakable transferring elements and maintenance is normally limited to replacing the batteries. เกจวัดแรงดัน -powered electromagnetic flowmeters now provide a 5-year battery life, and the worth of battery replacement is a fraction of the cost associated with typical mechanical meter repairs. In addition, most electromagnetic flowmeters come standard with a two- to five-year guarantee, relying on the model.
Electromagnetic or mechanical?

Electromagnetic move meters – also known as magnetic meters or just 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 movement of the conductive fluid through the sector generates a small quantity of electrical vitality, similar to a generator (more move = extra voltage). An electron coil positioned on the skin of the fluid is instantly energized. The magnetic area passes through the fluid at right angles, the electrodes measure the altering voltage, and the show unit shows the speed and the entire. Electromagnetic flow meters have been round for 60 years, just not for irrigation. They are usually used for municipal and industrial, water and wastewater purposes. In the final 15 years or so, magnetometer technology has developed so quickly that some can now be battery powered and are perfect for irrigation use. Most electromagnetic move meters come normal with many mechanical propeller move meter options. Many times, the overall out-of-pocket cost of an electromagnetic move meter might be less than the price of a mechanical propeller circulate meter. To ensure you get your money’s value, think about what you need from your flowmeter – added pulse output, straightened vanes (for tight space installations), excessive capability bearing assemblies, digital readout, information logging and some other choices that might be required with a mechanical propeller meter – after which evaluate the worth to a battery-powered electromagnetic meter, which typically include all the choices you want as normal options. In the top, electromagnetic flowmeters offer: larger accuracy over a wider circulate range, no shifting components to switch, sturdiness, no circulate 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 at the moment are obtainable with saddle inserts for simple set up in new installations and retrofit/replacement of current 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 circulate meters or just propeller move meters, function based on the next precept – A propeller circulate meter consists of a rotating gadget, normally a spiral impeller, located in the air stream. The impeller rotates at a velocity proportional to the rate of the move. As the water flows through the pipe, it rotates the propeller. The rotational motion is then transmitted to the pinnacle of the meter via a gear or drive cable. The instantaneous and complete circulate charges can be learn on a mechanical or digital meter register. Although they work on the same principle, these meters can be found in a big selection of mounting configurations to fulfill the wants of the installer: saddle, flange, threaded finish, grooved finish, and so forth., making set up simpler. Propeller meters provide a cost-effective circulate metering solution when only mechanical circulate and whole move are required. They sometimes work nicely in clear water applications, however particles carrying water can damage transferring elements. While mechanical propeller circulate meters have been once the most economical possibility for irrigation, that is often now not the case.
Apure is a designer and manufacturer of a wide range of move metering, field instrumentation and process analyzer products. Since 2007, we have been offering revolutionary solutions for customers in irrigation, water treatment, groundwater, surface water and chemical processing purposes. Our products have a popularity for durability and accuracy at aggressive costs and are sold through a community of domestic and worldwide distributors. We make use of just-in-time manufacturing strategies and are extremely dedicated to continuous improvement. Our focus on innovation, product worth and buyer accessibility has led to almost 20 years of consistent progress. Feel free to contact us for technical, citation or distributor support.
More articles on flowmeters:
Difference between move meter and move transmitter

Flow meter calibration

Useful details about move models

Mass move price vs volumetric move pricee