Water move meters are required by nationwide water companies for model spanking new and present agricultural irrigation purposes to measure and manage floor water and groundwater use. There is a rising have to preserve sources and stability the water needs of agriculture with other industries, and as the inhabitants continues to develop, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the method irrigators use to determine the right frequency and length of watering. It includes understanding, applying after which monitoring and controlling the required instruments 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 well being and yield. Good irrigation planning practices embrace figuring out how a lot water is utilized in each subject. A properly chosen and put in circulate meter precisely measures the amount of water utilized. Accurate move meters are an important software for implementing an excellent irrigation program.
The two most typical kinds of irrigation move meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate meters which have been round in irrigation since 1919 and therefore make up a large portion of the installed base of irrigation water meters. Fifteen years ago, many people thought that propeller meters were the best meter selection for irrigation – that’s not the case today. Expensive propeller meter repairs have led many meter users to search for different circulate measurement choices. With advances in know-how, electromagnetic flowmeters are now out there for battery energy at distant irrigation places. Many have long battery life, high accuracy in tight areas, and no moving elements to put on out; they are unaffected by particles. Some electromagnetic move meters are comparable in price to mechanical propeller circulate meters.
Use the following 4 ideas to help select the best move meter for irrigation.
Table of Contents
What is the application?
How essential is accuracy?
What is your meter maintenance schedule?
Electromagnetic or mechanical?
What is the application?
Knowledge of the fluid medium, move vary, temperature, pressure, line size, desired sign output and available set up space are all needed to ensure correct circulate meter choice.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While pressure gauge 10 bar could also be suitable for clear water functions where the flow range is within the meter’s capability, electromagnetic meters supply the highest accuracy and performance in each clear and dirty water applications. With no moving parts, weeds, trash and mud may become entangled within the mechanical meter and simply flow through the magnetic meter.
What are the minimal and maximum move ranges? When choosing a mechanical propeller flow meter, it’s critical to know the minimum and maximum move ranges. A propeller move meter requires a minimum move price to permit the bearing assembly and propeller to show fast sufficient to ensure accurate readings. If the flow price exceeds the mechanical meter’s rating, the bearing assembly can endure expensive damage and the meter is not going to operate properly. Because there are not any moving parts to put on, electromagnetic flowmeters present higher accuracy over a wider move vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters supplied for this market are rated to function at temperatures up to one hundred fifty psi and one hundred forty F. Most of these functions fall inside that temperature and strain range. However, it’s at all times sensible to verify 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 are available in full bore and plug-in configurations. For cost and ease of installation, the plug-in fashion may be your best option for bigger line sizes.
Does the meter require a signal output? Some functions require the instrument to ship signals similar to pulses, 4-20mA, or Modbus. In some cases, the output is used to ship a signal to a distant telemetry system, permitting the irrigator to collect meter information remotely. Signal outputs on propeller flow meters are optional and often require the added value of a transmitter or special digital register that may present the output. Most electromagnetic flow meters have pulse sign output as a regular feature, making them “telemetry system ready” and can present Modbus or 4-20mA output signals for a small additional price.
How much space is available to put in the meter? The straight pipe requirements for flow meters are costly by means of materials and installation labor. In the case of including a new circulate meter to an existing facility, there might be often not sufficient house 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 make sure correct and correct efficiency. Straightening vanes or rectifiers may be mounted in entrance of the propeller meter to shorten the straight pipe requirement, however can considerably improve the cost and installation labor involved. Typically, a standard full-bore electromagnetic flow meter will fit well in tight spaces and measure circulate precisely.
How necessary is accuracy?
In general, electromagnetic meters are extra correct than mechanical meters. Most electromagnetic flow meters for irrigation present +/-1% circulate over a variety of circulate rates with no head loss. The commonest mechanical meter used in irrigation is the propeller circulate meter. Propeller meters sometimes provide +/-2% accuracy over a specified move vary and will expertise some head loss. Because there are not any transferring components to put on, electromagnetic meters can keep accuracy all through the life of the meter.
What is your meter upkeep schedule?
As with most farm gear, all irrigation flow meters require consideration in some unspecified time within the future.
Mechanical propeller meters have transferring parts, corresponding to propellers, bearings and mechanical registers, that can wear out, causing interruptions in measurement data and leading to costly repairs. The variety of parts for mechanical gauges has elevated dramatically through the years, and the fee to restore a component is type of as excessive as the cost to replace it. The normal warranty on most mechanical propeller gauges is one year.
Electromagnetic meters don’t have any breakable shifting components and upkeep is usually restricted to changing the batteries. Many battery-powered electromagnetic flowmeters now provide a 5-year battery life, and the cost of battery replacement 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 warranty, depending on the model.
Electromagnetic or mechanical?
Electromagnetic move meters – also called magnetic meters or just electrometers – function 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 movement of the conductive fluid via the field generates a small amount of electrical energy, identical to a generator (more circulate = more voltage). An electron coil positioned on the outside 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 shows the rate and the total. Electromagnetic move meters have been round for 60 years, just not for irrigation. They are usually used for municipal and industrial, water and wastewater applications. In the final 15 years or so, magnetometer expertise has developed so shortly that some can now be battery powered and are excellent for irrigation use. Most electromagnetic move meters come normal with many mechanical propeller move meter options. Many instances, the general out-of-pocket cost of an electromagnetic move meter might be less than the value of a mechanical propeller move meter. To ensure you get your money’s price, contemplate what you need out of your flowmeter – added pulse output, straightened vanes (for tight house installations), excessive capacity bearing assemblies, digital readout, information logging and another choices that could be required with a mechanical propeller meter – after which evaluate the value to a battery-powered electromagnetic meter, which usually embody all of the choices you want as standard options. In the top, electromagnetic flowmeters supply: higher accuracy over a wider move range, no shifting components to exchange, sturdiness, no circulate blockage, lengthy battery life, low upkeep prices, longer warranties, and minimal straight pipe requirements for tight house installations. In addition to full bore, some electromagnetic flowmeters are actually out there with saddle inserts for straightforward 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 move meters or simply propeller flow meters, function according to the following precept – A propeller move meter consists of a rotating gadget, often a spiral impeller, situated in the air stream. The impeller rotates at a velocity proportional to the speed of the flow. As the water flows by way of the pipe, it rotates the propeller. The rotational movement is then transmitted to the head of the meter by way of a gear or drive cable. The instantaneous and complete circulate rates may 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 meet the needs of the installer: saddle, flange, threaded end, grooved end, etc., making installation simpler. Propeller meters provide a cheap flow metering solution when solely mechanical circulate and total move are required. They sometimes work well in clear water applications, but particles carrying water can damage shifting parts. While mechanical propeller circulate meters had been once probably the most economical option for irrigation, this is usually no longer the case.
Apure is a designer and producer of a wide range of flow metering, area instrumentation and course of analyzer merchandise. Since 2007, we’ve been providing progressive options for customers in irrigation, water remedy, groundwater, floor water and chemical processing applications. Our merchandise have a reputation for durability and accuracy at aggressive costs and are bought by way of a community of home and worldwide distributors. We employ just-in-time manufacturing methods and are extremely committed to continuous improvement. Our focus on innovation, product worth and customer accessibility has led to nearly twenty years of consistent development. Feel free to contact us for technical, quotation or distributor help.
More articles on flowmeters:
Difference between flow meter and circulate transmitter
Flow meter calibration
Useful information about flow items
Mass circulate price vs volumetric circulate feee
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Water circulate meters are required by nationwide water agencies for brand spanking new and existing agricultural irrigation purposes to measure and manage floor water and groundwater use. There is a growing need to conserve resources and steadiness the water wants of agriculture with other industries, and as a result of the inhabitants 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 after which monitoring and controlling the mandatory instruments corresponding to soil moisture sensors, rain gauges and flow meters to ensure environment friendly water use in crop production. This minimizes water waste and supports water conservation whereas maximizing crop well being and yield. Good irrigation planning practices embrace knowing how much water is used in each subject. A properly chosen and put in flow meter accurately measures the quantity of water utilized. Accurate move meters are an necessary device for implementing an excellent irrigation program.
The two commonest types of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate 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 were the best meter choice for irrigation – that isn’t the case right now. Expensive propeller meter repairs have led many meter users to search for different move measurement options. With advances in expertise, electromagnetic flowmeters are actually out there for battery power at distant irrigation places. Many have long battery life, high accuracy in tight areas, and no transferring elements to wear out; they are unaffected by particles. Some electromagnetic flow meters are related in worth to mechanical propeller flow meters.
Use the following 4 ideas to help select the best move meter for irrigation.
Table of Contents
What is the application?
How important is accuracy?
What is your meter maintenance schedule?
Electromagnetic or mechanical?
What is the application?
Knowledge of the fluid medium, flow vary, temperature, stress, line size, desired sign output and available installation space 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 appropriate for clear water applications where the circulate vary is within the meter’s capability, electromagnetic meters offer the very best accuracy and efficiency in both clear and soiled water functions. With no shifting elements, weeds, trash and dirt may become entangled within the mechanical meter and easily flow via the magnetic meter.
What are the minimum and most move ranges? When choosing a mechanical propeller flow meter, it is crucial to know the minimum and most circulate ranges. A propeller move meter requires a minimum move price to permit the bearing assembly and propeller to show quick enough to make sure correct readings. If the circulate fee exceeds the mechanical meter’s ranking, the bearing meeting can suffer costly injury and the meter will not perform correctly. Because there aren’t any shifting elements to put on, electromagnetic flowmeters present greater accuracy over a wider flow range than mechanical meters.
What are the temperatures and pressures? Most flowmeters provided for this market are rated to function at temperatures up to 150 psi and one hundred forty F. Most of those applications fall within that temperature and pressure range. However, it’s always sensible to substantiate the applying temperature and stress.
What is the dimensions of the line? This will help decide the style of meter. Both electromagnetic and mechanical gauges can be found in full bore and plug-in configurations. For cost and ease of set up, the plug-in fashion may be the greatest choice for larger line sizes.
Does the meter require a signal output? Some applications require the instrument to ship indicators similar to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to ship a signal to a remote telemetry system, permitting the irrigator to collect meter data remotely. Signal outputs on propeller move meters are optionally available and normally require the added value of a transmitter or special digital register that can present the output. Most electromagnetic circulate meters have pulse sign output as a normal feature, making them “telemetry system ready” and might provide Modbus or 4-20mA output alerts for a small further price.
How a lot space is out there to put in the meter? The straight pipe necessities for move meters are expensive when it comes to supplies and installation labor. In the case of including a brand new move meter to an existing facility, there is usually not sufficient space to accommodate the straight pipe sections required for correct flow measurement. Mechanical propeller meters require more space to put in because of the longer straight run requirements to make sure correct and accurate performance. Straightening vanes or rectifiers may be mounted in front of the propeller meter to shorten the straight pipe requirement, but can significantly improve the cost and set up labor concerned. Typically, a normal full-bore electromagnetic move meter will fit well in tight areas and measure move precisely.
How important is accuracy?
In common, electromagnetic meters are more accurate than mechanical meters. Most electromagnetic circulate meters for irrigation provide +/-1% move over a extensive range of flow 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 circulate vary and will expertise some head loss. Because there are no shifting 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 moving components, similar to propellers, bearings and mechanical registers, that may put on out, inflicting interruptions in measurement knowledge and leading to expensive repairs. The variety of components for mechanical gauges has increased dramatically through the years, and the fee to repair an element is sort of as high as the cost to switch it. The normal guarantee on most mechanical propeller gauges is one year.
Electromagnetic meters do not have any breakable transferring components and upkeep is usually limited to replacing the batteries. Many battery-powered electromagnetic flowmeters now offer a 5-year battery life, and the cost of battery substitute is a fraction of the fee related to typical mechanical meter repairs. In addition, most electromagnetic flowmeters come commonplace with a two- to five-year guarantee, relying on the model.
Electromagnetic or mechanical?
Electromagnetic move meters – also called magnetic meters or just electrometers – function in accordance with Faraday’s Law – if a conductive fluid (such as irrigation water) passes via a magnetic subject, a small voltage is generated. The motion of the conductive fluid by way of the field generates a small quantity of electrical power, identical to a generator (more circulate = more voltage). An electron coil positioned on the outside of the fluid is instantly energized. The magnetic field passes through the fluid at proper angles, the electrodes measure the changing voltage, and the show unit shows the speed and the entire. Electromagnetic circulate meters have been round for 60 years, simply 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 excellent for irrigation use. Most electromagnetic circulate meters come normal with many mechanical propeller circulate meter choices. Many instances, the overall out-of-pocket cost of an electromagnetic flow meter might be lower than the price of a mechanical propeller flow meter. To ensure you get your money’s price, consider what you need out of your flowmeter – added pulse output, straightened vanes (for tight space installations), excessive capacity bearing assemblies, digital readout, data logging and some other options which might be required with a mechanical propeller meter – and then examine the value to a battery-powered electromagnetic meter, which typically include all the options you want as standard features. In the top, electromagnetic flowmeters offer: higher accuracy over a wider flow range, no moving parts to exchange, sturdiness, no circulate blockage, long battery life, low upkeep costs, longer warranties, and minimal straight pipe requirements for tight space installations. In addition to full bore, some electromagnetic flowmeters are now obtainable with saddle inserts for simple 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 circulate meters, operate according to the next precept – A propeller move meter consists of a rotating gadget, often a spiral impeller, positioned in the air stream. The impeller rotates at a speed proportional to the rate of the flow. As the water flows by way of 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 flow rates can be learn on a mechanical or digital meter register. Although they work on the same precept, these meters are available in a wide selection of mounting configurations to satisfy the needs of the installer: saddle, flange, threaded end, grooved end, and so forth., making installation easier. Propeller meters present a cheap circulate metering answer when only mechanical circulate and total circulate are required. They typically work well in clear water functions, however debris carrying water can harm transferring components. While mechanical propeller move meters were once probably the most economical possibility for irrigation, that is normally no longer the case.
Apure is a designer and manufacturer of a variety of circulate metering, field instrumentation and process analyzer merchandise. Since 2007, we now have been providing revolutionary solutions for users in irrigation, water remedy, groundwater, surface water and chemical processing applications. Our products have a reputation for sturdiness and accuracy at aggressive prices and are sold through a network of home and international distributors. We employ just-in-time manufacturing strategies and are extremely committed to steady enchancment. Our focus on innovation, product worth and customer accessibility has led to almost twenty years of constant development. Feel free to contact us for technical, quotation or distributor support.
More articles on flowmeters:
Difference between flow meter and circulate transmitter
Flow meter calibration
Useful information about circulate items
Mass move fee vs volumetric move ratee