Water circulate meters are required by nationwide water agencies for model spanking new and current agricultural irrigation applications to measure and manage surface water and groundwater use. There is a rising need to conserve resources and stability the water needs of agriculture with different industries, and as the population continues to develop, residential use is driving water conservation in unprecedented ways.
Irrigation scheduling is the process irrigators use to find out the proper frequency and length of watering. It involves understanding, making use of and then monitoring and controlling the necessary 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 supports water conservation whereas maximizing crop health and yield. Good irrigation planning practices include figuring out how much water is utilized in every subject. A correctly selected and put in flow meter precisely measures the quantity of water utilized. Accurate flow meters are an important tool for implementing a good irrigation program.
The two most typical forms of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate meters that have been round in irrigation since 1919 and therefore make up a big portion of the put in base of irrigation water meters. Fifteen years ago, many people thought that propeller meters were the best meter choice for irrigation – that isn’t the case at present. Expensive propeller meter repairs have led many meter users to search for other move measurement choices. With advances in technology, electromagnetic flowmeters are now obtainable for battery energy at remote irrigation areas. Many have lengthy battery life, excessive accuracy in tight areas, and no moving elements to wear out; they are unaffected by debris. Some electromagnetic move meters are comparable in price to mechanical propeller move meters.
Use the next 4 suggestions to help choose the proper 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, flow range, temperature, stress, line measurement, desired sign output and obtainable set up house are all necessary to ensure correct circulate meter choice.
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 functions where the circulate vary is inside the meter’s capability, electromagnetic meters offer the very best accuracy and performance in both clear and dirty water functions. With no shifting components, weeds, trash and mud may turn out to be entangled in the mechanical meter and simply move via the magnetic meter.
What are the minimum and most move ranges? When deciding on a mechanical propeller flow meter, it is crucial to know the minimal and most move ranges. A propeller circulate meter requires a minimal move price to allow the bearing meeting and propeller to turn fast sufficient to make sure correct readings. If the flow fee exceeds the mechanical meter’s score, the bearing meeting can endure pricey damage and the meter is not going to perform correctly. Because there are not any transferring elements to wear, electromagnetic flowmeters provide greater 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 as a lot as one hundred fifty psi and one hundred forty F. Most of those functions fall inside that temperature and pressure vary. However, it’s at all times sensible to confirm the application temperature and strain.
What is the scale of the line? This will help determine the fashion of meter. เกจวัดแรงดันเบนซิน and mechanical gauges can be found in full bore and plug-in configurations. For value and ease of installation, the plug-in type could also be your best option for larger line sizes.
Does the meter require a sign output? Some purposes require the instrument to ship indicators similar to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to send a signal to a remote telemetry system, permitting the irrigator to collect meter information remotely. Signal outputs on propeller move meters are optionally available and usually require the added cost of a transmitter or particular digital register that may present the output. Most electromagnetic move meters have pulse signal output as a standard feature, making them “telemetry system ready” and might provide Modbus or 4-20mA output indicators for a small extra cost.
How a lot house is available to install the meter? The straight pipe requirements for flow meters are expensive by means of supplies and installation labor. In the case of adding a brand new flow meter to an existing facility, there’s usually not enough house to accommodate the straight pipe sections required for accurate flow measurement. Mechanical propeller meters require more space to install because of the longer straight run necessities to make sure proper and correct performance. Straightening vanes or rectifiers may be mounted in front of the propeller meter to shorten the straight pipe requirement, but can considerably increase the fee and installation labor concerned. Typically, a standard full-bore electromagnetic move meter will match well in tight spaces and measure circulate precisely.
How essential is accuracy?
In basic, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic move meters for irrigation present +/-1% move over a variety of circulate charges with no head loss. The most typical mechanical meter used in irrigation is the propeller move meter. Propeller meters usually provide +/-2% accuracy over a specified flow range and will expertise some head loss. Because there are not any transferring elements to wear, electromagnetic meters can maintain accuracy throughout the life of the meter.
What is your meter maintenance schedule?
As with most farm tools, all irrigation flow meters require attention sooner or later.
Mechanical propeller meters have transferring elements, similar to propellers, bearings and mechanical registers, that can put on out, inflicting interruptions in measurement data and leading to costly repairs. The variety of components for mechanical gauges has elevated dramatically through the years, and the fee to repair an element is almost as excessive as the cost to replace it. The commonplace guarantee on most mechanical propeller gauges is one year.
Electromagnetic meters wouldn’t have any breakable moving components and upkeep is normally restricted to replacing 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 cost associated with typical mechanical meter repairs. In addition, most electromagnetic flowmeters come standard with a two- to five-year warranty, depending on the brand.
Electromagnetic or mechanical?
Electromagnetic flow meters – also called magnetic meters or just electrometers – operate in accordance with Faraday’s Law – if a conductive fluid (such as irrigation water) passes through 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, identical to a generator (more flow = extra voltage). An electron coil positioned on the surface of the fluid is instantly energized. The magnetic field passes via the fluid at proper angles, the electrodes measure the changing voltage, and the display unit shows the speed and the entire. Electromagnetic flow meters have been around for 60 years, just not for irrigation. They are sometimes used for municipal and industrial, water and wastewater purposes. In the last 15 years or so, magnetometer technology has developed so shortly that some can now be battery powered and are good for irrigation use. Most electromagnetic move meters come standard with many mechanical propeller move meter options. Many instances, the overall out-of-pocket price of an electromagnetic circulate meter might be less than the worth of a mechanical propeller flow meter. To make sure you get your money’s worth, consider what you want from your flowmeter – added pulse output, straightened vanes (for tight space installations), excessive capability bearing assemblies, digital readout, knowledge logging and some other options that might be required with a mechanical propeller meter – after which evaluate the price to a battery-powered electromagnetic meter, which generally include all the options you need as commonplace features. In the top, electromagnetic flowmeters offer: greater accuracy over a wider flow range, no shifting elements to exchange, durability, no move blockage, lengthy battery life, low maintenance prices, longer warranties, and minimal straight pipe necessities for tight house installations. In addition to full bore, some electromagnetic flowmeters at the second are out there with saddle inserts for easy 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 move meters or just propeller circulate meters, function based on the next precept – A propeller move 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 move. As the water flows by way of the pipe, it rotates the propeller. The rotational motion is then transmitted to the top of the meter by way of a gear or drive cable. The instantaneous and total flow rates could be read on a mechanical or digital meter register. Although they work on the same precept, these meters are available in a variety of mounting configurations to meet the wants of the installer: saddle, flange, threaded end, grooved finish, and so forth., making installation easier. Propeller meters provide an economical flow metering resolution when solely mechanical flow and complete move are required. They usually work well in clear water applications, but particles carrying water can damage moving parts. While mechanical propeller move meters have been once probably the most economical choice for irrigation, that is usually now not the case.
Apure is a designer and producer of a extensive range of move metering, subject instrumentation and process analyzer merchandise. Since 2007, we’ve been offering progressive solutions for customers in irrigation, water remedy, 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 community of home and worldwide distributors. We make use of just-in-time manufacturing methods and are extremely dedicated to continuous enchancment. Our give consideration to innovation, product value and buyer accessibility has led to nearly two decades of consistent progress. Feel free to contact us for technical, quotation or distributor assist.
More articles on flowmeters:
Difference between circulate meter and flow transmitter
Flow meter calibration
Useful details about move items
Mass circulate price vs volumetric move feee
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Water move meters are required by national water companies for new and existing agricultural irrigation purposes to measure and manage surface water and groundwater use. There is a growing need to conserve sources and balance the water wants of agriculture with other 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 proper frequency and length of watering. It entails understanding, applying and then monitoring and controlling the mandatory instruments corresponding to soil moisture sensors, rain gauges and move meters to ensure efficient water use in crop production. This minimizes water waste and supports water conservation whereas maximizing crop health and yield. Good irrigation planning practices embrace figuring out how a lot water is utilized in each subject. A correctly selected and put in circulate meter precisely measures the quantity of water applied. Accurate flow meters are an essential software for implementing a great irrigation program.
The two most typical kinds of irrigation flow meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate meters which have been round in irrigation since 1919 and subsequently make up a large portion of the installed base of irrigation water meters. Fifteen years ago, many people thought that propeller meters have been one of the best meter choice for irrigation – that’s not the case today. Expensive propeller meter repairs have led many meter customers to look for different move measurement options. With advances in know-how, 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 elements to put on down; they are unaffected by debris. Some electromagnetic circulate meters are related in value 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 necessary is accuracy?
What is your meter upkeep schedule?
Electromagnetic or mechanical?
What is the application?
Knowledge of the fluid medium, flow range, temperature, stress, line dimension, desired sign output and out there installation house are all necessary 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 appropriate for clear water purposes the place the move range is within the meter’s functionality, electromagnetic meters offer the best accuracy and efficiency in both clear and soiled water applications. With no shifting elements, weeds, trash and dirt could turn out to be entangled in the mechanical meter and easily circulate through the magnetic meter.
What are the minimum and most move ranges? When choosing a mechanical propeller circulate meter, it is important to know the minimum and most circulate ranges. A propeller move meter requires a minimal flow fee to permit the bearing assembly and propeller to turn quick sufficient to make sure accurate readings. If the move rate exceeds the mechanical meter’s score, the bearing assembly can suffer costly injury and the meter will not operate properly. Because there are no moving parts to wear, electromagnetic flowmeters provide greater accuracy over a wider move vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters offered for this market are rated to function at temperatures up to one hundred fifty psi and a hundred and forty F. Most of those purposes fall inside that temperature and stress range. However, it is at all times wise to substantiate the applying temperature and stress.
What is the size 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 value and ease of set up, the plug-in style may be your greatest option for larger line sizes.
Does the meter require a signal output? Some applications require the instrument to ship indicators such as pulses, 4-20mA, or Modbus. In some cases, the output is used to ship a sign to a remote telemetry system, allowing the irrigator to gather meter knowledge remotely. Signal outputs on propeller flow meters are optionally available and normally require the added cost of a transmitter or particular digital register that may provide 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 extra value.
How much area is out there to put in the meter? The straight pipe necessities for circulate meters are costly when it comes to materials and set up labor. In the case of including a new move meter to an present facility, there might be typically not sufficient house to accommodate the straight pipe sections required for accurate flow measurement. Mechanical propeller meters require more space to install due to the longer straight run necessities to ensure proper 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 involved. Typically, a regular full-bore electromagnetic circulate meter will match nicely in tight spaces and measure circulate accurately.
How necessary is accuracy?
In common, electromagnetic meters are extra accurate than mechanical meters. Most electromagnetic circulate meters for irrigation present +/-1% move over a extensive range of flow charges with no head loss. The most typical mechanical meter used in irrigation is the propeller circulate meter. Propeller meters typically provide +/-2% accuracy over a specified move vary and may experience some head loss. Because there aren’t any transferring parts to put on, electromagnetic meters can preserve accuracy all through the life of the meter.
What is your meter maintenance schedule?
As with most farm tools, all irrigation move meters require consideration sooner or later.
Mechanical propeller meters have shifting components, such as propellers, bearings and mechanical registers, that may wear out, causing interruptions in measurement knowledge and resulting in expensive repairs. The variety of parts for mechanical gauges has elevated dramatically over the years, and the cost to restore an element is kind of as high as the price to switch it. The commonplace warranty on most mechanical propeller gauges is one 12 months.
Electromagnetic meters do not have any breakable moving elements and maintenance is normally limited to replacing the batteries. Many battery-powered electromagnetic flowmeters now supply a 5-year battery life, and the value of battery substitute is a fraction of the cost associated with typical mechanical meter repairs. In addition, most electromagnetic flowmeters come normal with a two- to five-year guarantee, relying on the model.
Electromagnetic or mechanical?
Electromagnetic circulate meters – also referred to as magnetic meters or just electrometers – operate according to 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 amount of electrical energy, identical to a generator (more move = extra voltage). An electron coil placed on the surface of the fluid is immediately energized. The magnetic subject passes by way of the fluid at proper angles, the electrodes measure the altering voltage, and the show unit exhibits the rate and the total. Electromagnetic flow meters have been round for 60 years, simply not for irrigation. They are sometimes used for municipal and industrial, water and wastewater functions. In the last 15 years or so, magnetometer know-how has evolved 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 move meter options. Many times, the general out-of-pocket cost of an electromagnetic move meter shall be less than the worth of a mechanical propeller move meter. To ensure you get your money’s price, consider what you want from your flowmeter – added pulse output, straightened vanes (for tight space installations), excessive capacity bearing assemblies, digital readout, data 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 usually include all of the choices you need as commonplace options. In the end, electromagnetic flowmeters provide: higher accuracy over a wider circulate vary, no transferring components to switch, sturdiness, no circulate blockage, lengthy battery life, low upkeep costs, longer warranties, and minimum straight pipe necessities for tight space installations. In addition to full bore, some electromagnetic flowmeters are actually obtainable with saddle inserts for straightforward set up in new installations and retrofit/replacement of present saddle propeller meters.
AYT Digital Liquid Magnetic Flow Meter
Learn More AYT Digital Liquid Magnetic Flow Meter
AFT Split Type Electromagnetic Flow Meter
Learn More AFT Split Type Electromagnetic Flow Meter
ACT Insertion Type Magnetic Flowmeter
Learn More ACT Insertion Type Magnetic Flowmeter
Mechanical Propeller Meters – Also known as propeller circulate meters or simply propeller move meters, operate based on the following precept – A propeller circulate meter consists of a rotating gadget, normally a spiral impeller, situated in the air stream. The impeller rotates at a speed proportional to the speed of the circulate. As the water flows via the pipe, it rotates the propeller. The rotational movement is then transmitted to the head of the meter via a gear or drive cable. The instantaneous and complete flow charges can be read on a mechanical or digital meter register. Although they work on the identical principle, these meters can be found in quite a lot of mounting configurations to fulfill the wants of the installer: saddle, flange, threaded finish, grooved end, etc., making installation easier. Propeller meters present a cost-effective move metering answer when only mechanical flow and total flow are required. They sometimes work nicely in clear water purposes, however debris carrying water can injury shifting parts. While mechanical propeller move meters had been as quickly as probably the most economical possibility for irrigation, that is usually not the case.
Apure is a designer and manufacturer of a wide range of flow metering, field instrumentation and process analyzer merchandise. Since 2007, we’ve been providing innovative solutions for users in irrigation, water therapy, groundwater, floor water and chemical processing applications. Our merchandise have a popularity for sturdiness and accuracy at competitive prices and are bought via a community of domestic and international distributors. We make use of just-in-time manufacturing methods and are extremely committed to continuous enchancment. Our give consideration to innovation, product value and buyer accessibility has led to almost two decades of constant progress. 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 circulate price vs volumetric flow pricee