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Water move meters are required by nationwide water businesses for new and current agricultural irrigation purposes to measure and handle floor water and groundwater use. There is a growing have to conserve resources and steadiness the water wants of agriculture with other industries, and as the inhabitants continues to develop, residential use is driving water conservation in unprecedented ways.
Irrigation scheduling is the process irrigators use to determine the right frequency and duration of watering. It involves understanding, making use of and then monitoring and controlling the mandatory devices such as soil moisture sensors, rain gauges and circulate meters to ensure environment friendly water use in crop production. This minimizes water waste and helps water conservation while maximizing crop health and yield. Good irrigation planning practices embody understanding how a lot water is used in every area. A correctly chosen and installed flow meter precisely measures the quantity of water utilized. Accurate circulate meters are an necessary tool for implementing a great irrigation program.
The two most typical forms of irrigation flow meters are electromagnetic meters and propeller meters. Propeller meters are mechanical move meters which were round in irrigation since 1919 and subsequently make up a large portion of the put in 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's not the case today. Expensive propeller meter repairs have led many meter users to search for other move measurement options. With advances in expertise, electromagnetic flowmeters are now available for battery energy at remote irrigation places. Many have lengthy battery life, high accuracy in tight areas, and no moving elements to wear down; they are unaffected by particles. Some electromagnetic flow meters are comparable in value to mechanical propeller flow meters.
Use the next 4 tips to help choose the right move 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, flow range, temperature, strain, line dimension, desired sign output and obtainable set up area are all necessary to make sure correct 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 purposes the place the circulate range is within the meter’s capability, electromagnetic meters supply the best accuracy and performance in both clear and dirty water functions. With no shifting components, weeds, trash and mud might turn out to be entangled within the mechanical meter and easily circulate by way of the magnetic meter.
What are the minimum and most move ranges? When choosing a mechanical propeller circulate meter, it is critical to know the minimal and most circulate ranges. A propeller move meter requires a minimum move fee to permit the bearing meeting and propeller to turn fast enough to make sure accurate readings. If the circulate rate exceeds the mechanical meter’s rating, the bearing meeting can undergo expensive damage and the meter won't function correctly. Because there are not any moving elements 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 function at temperatures up to 150 psi and one hundred forty F. Most of those functions fall inside that temperature and stress range. However, it is always sensible to verify the appliance temperature and stress.
What is the size of the line? This will assist decide the style of meter. Both electromagnetic and mechanical gauges are available in full bore and plug-in configurations. For value and ease of installation, the plug-in fashion could also be your finest option for bigger line sizes.
Does the meter require a signal output? Some functions require the instrument to ship alerts corresponding to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to ship a signal to a distant telemetry system, permitting the irrigator to gather meter knowledge remotely. Signal outputs on propeller circulate meters are optionally available and normally require the added price of a transmitter or particular digital register that can provide the output. Most electromagnetic circulate meters have pulse signal output as a normal feature, making them “telemetry system ready” and can present Modbus or 4-20mA output alerts for a small additional price.
How a lot space is out there to put in the meter? The straight pipe necessities for flow meters are costly when it comes to supplies and set up labor. In the case of including a brand new move meter to an current facility, there might be usually not sufficient house to accommodate the straight pipe sections required for accurate circulate measurement. Mechanical propeller meters require more room to put in because of the longer straight run requirements 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, but can considerably improve the fee and installation labor concerned. Typically, a regular full-bore electromagnetic circulate meter will fit properly in tight spaces and measure move precisely.
How necessary is accuracy?

In general, electromagnetic meters are extra correct than mechanical meters. Most electromagnetic circulate meters for irrigation present +/-1% circulate over a variety of move rates with no head loss. The most common mechanical meter utilized in irrigation is the propeller circulate meter. Propeller meters sometimes provide +/-2% accuracy over a specified flow vary and should experience some head loss. Because there are no moving components to wear, electromagnetic meters can keep accuracy all through the lifetime of the meter.
What is your meter upkeep schedule?

As with most farm tools, all irrigation circulate meters require attention at some point.
Mechanical propeller meters have transferring components, such as propellers, bearings and mechanical registers, that may wear out, causing interruptions in measurement data and leading to expensive repairs. The number of components for mechanical gauges has increased dramatically over time, and the price to restore an element is kind of as high as the cost to exchange it. The standard warranty on most mechanical propeller gauges is one yr.
Electromagnetic meters do not have any breakable shifting components and maintenance is normally limited to replacing the batteries. Many battery-powered electromagnetic flowmeters now supply a 5-year battery life, and the price of battery substitute is a fraction of the price associated with typical mechanical meter repairs. In addition, most electromagnetic flowmeters come normal with a two- to five-year guarantee, depending on the model.
Electromagnetic or mechanical?

Electromagnetic circulate 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 subject, a small voltage is generated. The motion of the conductive fluid through the sector generates a small quantity of electrical vitality, identical to a generator (more move = 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 exhibits the rate and the entire. เครื่องมือที่ใช้วัดความดัน have been around for 60 years, just not for irrigation. They are typically used for municipal and industrial, water and wastewater functions. In the final 15 years or so, magnetometer know-how has advanced so shortly that some can now be battery powered and are good for irrigation use. Most electromagnetic flow meters come standard with many mechanical propeller circulate meter options. Many instances, the overall out-of-pocket value of an electromagnetic move meter will be less than the value of a mechanical propeller move meter. To make positive you get your money’s price, consider 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 options that might be required with a mechanical propeller meter – and then evaluate the worth to a battery-powered electromagnetic meter, which usually include all of the options you want as standard options. In the top, electromagnetic flowmeters provide: larger accuracy over a wider flow vary, no transferring components to exchange, durability, no flow blockage, lengthy battery life, low maintenance costs, longer warranties, and minimum straight pipe requirements for tight space installations. In addition to full bore, some electromagnetic flowmeters at the second are obtainable 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 known as propeller move meters or simply propeller move meters, function based on the following principle – A propeller move meter consists of a rotating system, usually a spiral impeller, located in the air stream. The impeller rotates at a velocity proportional to the rate of the flow. 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 via a gear or drive cable. The instantaneous and total circulate charges can be read on a mechanical or digital meter register. Although they work on the same precept, these meters can be found in quite a lot of mounting configurations to fulfill the needs of the installer: saddle, flange, threaded finish, grooved end, etc., making installation simpler. Propeller meters present a cost-effective move metering resolution when only mechanical circulate and total circulate are required. They usually work well in clear water functions, but debris carrying water can harm shifting components. While mechanical propeller circulate meters have been once probably the most economical possibility for irrigation, that is often no longer the case.
Apure is a designer and manufacturer of a wide range of flow metering, subject instrumentation and process analyzer products. Since 2007, we now have been offering revolutionary solutions for users in irrigation, water treatment, groundwater, floor water and chemical processing applications. Our merchandise have a popularity for durability and accuracy at competitive costs and are bought through a community of domestic and international distributors. We make use of just-in-time manufacturing strategies and are highly dedicated to continuous enchancment. Our give attention to innovation, product worth and customer accessibility has led to almost two decades of constant development. Feel free to contact us for technical, quotation or distributor help.
More articles on flowmeters:
Difference between move meter and flow transmitter

Flow meter calibration

Useful details about move models

Mass move fee vs volumetric move pricee
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Water circulate meters are required by national water companies for model new and existing agricultural irrigation functions to measure and manage surface water and groundwater use. There is a growing must preserve assets and steadiness the water wants of agriculture with different industries, and as the population continues to develop, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the process irrigators use to determine the correct frequency and length of watering. It entails understanding, applying and then monitoring and controlling the mandatory devices corresponding to 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 embody figuring out how much water is utilized in every subject. A correctly chosen and put in move meter precisely measures the quantity of water utilized. Accurate circulate meters are an necessary device for implementing a great irrigation program.
The two commonest kinds of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical flow meters that have been round in irrigation since 1919 and due to this fact 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 had been the most effective meter selection for irrigation – that's not the case at present. Expensive propeller meter repairs have led many meter customers to look for different move measurement choices. With advances in know-how, electromagnetic flowmeters are actually obtainable for battery energy at remote irrigation places. Many have lengthy battery life, excessive accuracy in tight spaces, and no transferring parts to wear down; they are unaffected by debris. Some electromagnetic flow meters are comparable in price to mechanical propeller circulate meters.
Use the next four suggestions to assist select 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, move range, temperature, pressure, line size, desired sign output and out there set up space are all essential to make sure correct circulate meter selection.
What is the application? Is it groundwater, surface water, pond water or manure slurry lagoon water? While mechanical meters may be suitable for clear water applications where the flow range is throughout the meter’s capability, electromagnetic meters provide the highest accuracy and efficiency in both clear and soiled water purposes. With no moving elements, weeds, trash and dust could turn into entangled within the mechanical meter and easily flow through the magnetic meter.
What are the minimum and maximum circulate ranges? When selecting a mechanical propeller flow meter, it's important to know the minimum and maximum move ranges. A propeller circulate meter requires a minimal move price to allow the bearing meeting and propeller to turn quick sufficient to make sure correct readings. If the flow fee exceeds the mechanical meter’s score, the bearing meeting can undergo pricey injury and the meter is not going to perform properly. Because there aren't any moving components to put on, electromagnetic flowmeters provide higher accuracy over a wider flow range 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 140 F. Most of these functions fall inside that temperature and stress vary. However, it's always wise to verify the appliance temperature and pressure.
What is the dimensions of the line? This will help determine the fashion of meter. Both electromagnetic and mechanical gauges are available in full bore and plug-in configurations. For price and ease of set up, the plug-in fashion could additionally be your greatest option for larger line sizes.
Does the meter require a sign 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 distant telemetry system, permitting the irrigator to gather meter data remotely. Signal outputs on propeller move meters are optional and normally require the added cost of a transmitter or special digital register that can present the output. Most electromagnetic move meters have pulse sign output as a standard characteristic, making them “telemetry system ready” and can present Modbus or 4-20mA output alerts for a small further value.
How a lot area is on the market to put in the meter? The straight pipe necessities for circulate meters are expensive by way of materials and installation labor. In the case of including a new circulate meter to an current facility, there could be often not enough area to accommodate the straight pipe sections required for correct circulate measurement. Mechanical propeller meters require more room to install due to the longer straight run necessities to ensure correct and correct performance. Straightening vanes or rectifiers can be mounted in entrance of the propeller meter to shorten the straight pipe requirement, but can significantly improve the price and set up labor concerned. Typically, a regular full-bore electromagnetic circulate meter will match properly in tight areas and measure flow accurately.
How important is accuracy?

In common, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic move meters for irrigation present +/-1% flow over a extensive range of move charges with no head loss. The most typical mechanical meter used in irrigation is the propeller flow meter. Propeller meters usually provide +/-2% accuracy over a specified move range and should expertise some head loss. Because there aren't any moving parts to put on, electromagnetic meters can preserve accuracy all through the life of the meter.
What is your meter upkeep schedule?

As with most farm equipment, all irrigation move meters require attention at some point.
Mechanical propeller meters have moving elements, corresponding to propellers, bearings and mechanical registers, that can put on out, causing interruptions in measurement information and leading to expensive repairs. The variety of elements for mechanical gauges has elevated dramatically over time, and the fee to repair a component is nearly as high as the fee to switch it. The normal warranty on most mechanical propeller gauges is one yr.
Electromagnetic meters wouldn't have any breakable shifting components and upkeep is often restricted to changing the batteries. Many battery-powered electromagnetic flowmeters now provide a 5-year battery life, and the price of battery alternative 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 warranty, depending on the model.
Electromagnetic or mechanical?

Electromagnetic circulate meters – also called magnetic meters or simply electrometers – operate in accordance with Faraday’s Law – if a conductive fluid (such as irrigation water) passes through a magnetic subject, a small voltage is generated. The movement of the conductive fluid through the sector generates a small amount of electrical power, identical to a generator (more flow = more voltage). An electron coil placed on the skin of the fluid is immediately energized. The magnetic subject passes via the fluid at proper angles, the electrodes measure the changing voltage, and the display unit exhibits the speed and the whole. Electromagnetic flow meters have been around for 60 years, simply not for irrigation. They are typically used for municipal and industrial, water and wastewater purposes. In the last 15 years or so, magnetometer expertise has developed so quickly that some can now be battery powered and are perfect for irrigation use. Most electromagnetic flow meters come commonplace with many mechanical propeller flow meter options. Many times, the overall out-of-pocket value of an electromagnetic move meter might be lower than the value of a mechanical propeller move meter. To ensure you get your money’s price, think about what you want from your flowmeter – added pulse output, straightened vanes (for tight house installations), high capability bearing assemblies, digital readout, knowledge logging and another choices which may be required with a mechanical propeller meter – and then compare the worth to a battery-powered electromagnetic meter, which typically embody all the options you need as standard features. In the end, electromagnetic flowmeters offer: larger accuracy over a wider circulate range, no transferring parts to replace, sturdiness, no flow blockage, lengthy battery life, low maintenance prices, longer warranties, and minimal straight pipe requirements for tight house installations. In addition to full bore, some electromagnetic flowmeters at the moment are 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 often known as propeller circulate meters or just propeller circulate meters, operate in accordance with the following precept – A propeller flow meter consists of a rotating device, usually a spiral impeller, positioned within the air stream. The impeller rotates at a velocity proportional to the velocity of the circulate. 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 move rates may be learn on a mechanical or digital meter register. Although they work on the identical principle, these meters are available in a wide selection of mounting configurations to satisfy the wants of the installer: saddle, flange, threaded end, grooved finish, and so on., making set up simpler. Propeller meters present an economical move metering answer when only mechanical move and total circulate are required. They typically work properly in clear water purposes, however particles carrying water can injury moving elements. While mechanical propeller circulate meters have been once the most economical possibility for irrigation, this is usually now not the case.
Apure is a designer and producer of a broad range of circulate metering, field instrumentation and course of analyzer products. Since 2007, we have been providing innovative solutions for customers in irrigation, water therapy, groundwater, surface water and chemical processing purposes. Our products have a status for sturdiness and accuracy at competitive prices and are sold via a network of home and worldwide distributors. We employ just-in-time manufacturing methods and are highly dedicated to continuous improvement. Our give consideration to innovation, product value and customer accessibility has led to nearly 20 years of consistent development. 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 move items

Mass move fee vs volumetric circulate feee