Water flow meters are required by nationwide water agencies for model spanking new and current agricultural irrigation purposes to measure and handle surface water and groundwater use. There is a rising need to preserve resources and steadiness the water wants of agriculture with other industries, and because the population continues to develop, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the method irrigators use to discover out the correct frequency and duration of watering. It entails understanding, applying and then monitoring and controlling the required devices similar to soil moisture sensors, rain gauges and circulate meters to make sure efficient water use in crop production. This minimizes water waste and helps water conservation while maximizing crop health and yield. Good irrigation planning practices include figuring out how much water is used in each field. A properly selected and installed circulate meter precisely measures the amount of water utilized. Accurate move meters are an essential software for implementing an excellent irrigation program.
The two commonest types of irrigation flow meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate 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 people thought that propeller meters had been the most effective meter selection for irrigation – that is not the case right now. Expensive propeller meter repairs have led many meter users to look for different circulate measurement options. With advances in know-how, electromagnetic flowmeters are now out there for battery energy at remote irrigation locations. Many have lengthy battery life, high accuracy in tight areas, and no transferring components to put on down; they are unaffected by particles. Some electromagnetic flow meters are comparable in worth to mechanical propeller circulate meters.
Use the following four tips to help choose the right flow 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 vary, temperature, stress, line dimension, desired signal output and obtainable installation area are all essential to ensure correct circulate 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 purposes the place the circulate vary is inside the meter’s functionality, electromagnetic meters provide the very best accuracy and efficiency in both clear and soiled water applications. With no moving components, weeds, trash and dirt could turn into entangled in the mechanical meter and simply flow through the magnetic meter.
What are the minimal and maximum flow ranges? When choosing a mechanical propeller flow meter, it is important to know the minimal and most move ranges. A propeller move meter requires a minimum circulate fee to permit the bearing assembly and propeller to turn fast enough to make sure accurate readings. If the flow price exceeds the mechanical meter’s score, the bearing meeting can suffer expensive injury and the meter is not going to function correctly. Because there are not any moving parts 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 as much as 150 psi and a hundred and forty F. Most of those functions fall within that temperature and strain range. However, it is all the time sensible to confirm the applying temperature and stress.
What is the dimensions of the line? This will assist decide the type 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 fashion may be the finest choice for larger line sizes.
Does the meter require a sign output? Some purposes require the instrument to ship signals corresponding to pulses, 4-20mA, or Modbus. In some instances, the output is used to ship a signal to a distant telemetry system, permitting the irrigator to gather meter data remotely. Signal outputs on propeller circulate meters are elective and usually require the added cost of a transmitter or particular digital register that can provide the output. Most electromagnetic move meters have pulse signal output as a regular feature, making them “telemetry system ready” and might provide Modbus or 4-20mA output signals for a small extra price.
How much area is out there to put in the meter? The straight pipe necessities for flow meters are costly by way of materials and installation labor. In the case of including a model new move meter to an current facility, there is usually not sufficient house to accommodate the straight pipe sections required for accurate circulate measurement. Mechanical propeller meters require more room to put in due to the longer straight run necessities to ensure correct and correct efficiency. Straightening vanes or rectifiers can be mounted in front of the propeller meter to shorten the straight pipe requirement, however can significantly improve the fee and installation labor involved. Typically, a normal full-bore electromagnetic move meter will fit properly in tight areas and measure circulate accurately.
How important is accuracy?
In general, electromagnetic meters are more accurate than mechanical meters. Most electromagnetic move meters for irrigation provide +/-1% circulate over a variety of circulate rates with no head loss. The commonest mechanical meter used in irrigation is the propeller move meter. Propeller meters usually present +/-2% accuracy over a specified circulate range and may experience some head loss. Because there aren’t any transferring parts to put on, electromagnetic meters can preserve accuracy throughout the lifetime of the meter.
What is your meter upkeep schedule?
As with most farm gear, all irrigation move meters require attention in some unspecified time within the future.
Mechanical propeller meters have shifting parts, similar to propellers, bearings and mechanical registers, that can wear out, inflicting interruptions in measurement information and resulting in pricey repairs. The variety of elements for mechanical gauges has elevated dramatically over time, and the cost to restore a part is almost as excessive as the cost to replace it. The commonplace warranty on most mechanical propeller gauges is one 12 months.
Electromagnetic meters do not have any breakable transferring elements and upkeep is normally 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, relying on the brand.
Electromagnetic or mechanical?
Electromagnetic flow meters – also known as magnetic meters or simply electrometers – function according to Faraday’s Law – if a conductive fluid (such as irrigation water) passes by way of a magnetic area, a small voltage is generated. The movement of the conductive fluid through the field generates a small quantity of electrical power, identical to a generator (more circulate = extra voltage). An electron coil positioned on the skin of the fluid is instantly energized. The magnetic field passes through the fluid at right angles, the electrodes measure the altering voltage, and the show unit exhibits the speed and the whole. Electromagnetic circulate meters have been around for 60 years, just not for irrigation. They are sometimes used for municipal and industrial, water and wastewater applications. In the last 15 years or so, magnetometer technology has advanced so quickly that some can now be battery powered and are good for irrigation use. Most electromagnetic circulate meters come standard with many mechanical propeller move meter options. Many instances, the overall out-of-pocket price of an electromagnetic circulate meter will be less than the worth of a mechanical propeller circulate meter. To ensure you get your money’s value, think about what you need out of your flowmeter – added pulse output, straightened vanes (for tight house installations), high capacity bearing assemblies, digital readout, knowledge logging and another options that may be required with a mechanical propeller meter – and then evaluate the value to a battery-powered electromagnetic meter, which typically embrace all of the choices you need as commonplace options. In the tip, electromagnetic flowmeters supply: greater accuracy over a wider flow vary, no shifting parts to exchange, durability, no circulate 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 are actually available 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 often recognized as propeller flow meters or simply propeller flow meters, function according to the following precept – A propeller circulate meter consists of a rotating device, usually a spiral impeller, situated within the air stream. The impeller rotates at a velocity proportional to the rate of the circulate. 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 via a gear or drive cable. The instantaneous and total flow charges may be learn on a mechanical or digital meter register. Although they work on the same principle, these meters are available in quite a lot of mounting configurations to satisfy the wants of the installer: saddle, flange, threaded finish, grooved end, and so on., making installation easier. Propeller meters present an economical flow metering solution when only mechanical circulate and complete move are required. They sometimes work nicely in clear water applications, but particles carrying water can injury shifting components. While mechanical propeller flow meters had been as soon as essentially the most economical possibility for irrigation, that is usually not the case.
Apure is a designer and manufacturer of a wide range of circulate metering, area instrumentation and process analyzer products. Since 2007, we now have been offering innovative solutions for users in irrigation, water treatment, groundwater, surface water and chemical processing functions. Our products have a reputation for sturdiness and accuracy at aggressive costs and are bought through a community of home and international distributors. We make use of just-in-time manufacturing methods and are extremely committed to steady improvement. Our focus on innovation, product value and customer accessibility has led to almost twenty years of consistent development. Feel free to contact us for technical, quotation or distributor help.
More articles on flowmeters:
Difference between move meter and move transmitter
Flow meter calibration
Useful details about circulate items
Mass circulate fee vs volumetric flow ratee
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Water flow meters are required by national water businesses for model spanking new and existing agricultural irrigation purposes to measure and handle surface water and groundwater use. There is a growing must conserve assets and stability the water needs of agriculture with other industries, and as a result of the population continues to develop, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the method irrigators use to discover out the proper frequency and duration of watering. It involves understanding, making use of after which monitoring and controlling the necessary instruments similar 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 embody knowing how a lot water is utilized in every field. A correctly selected and put in flow meter precisely measures the amount of water applied. Accurate flow meters are an important software for implementing a good irrigation program.
The two most typical forms of irrigation flow meters are electromagnetic meters and propeller meters. Propeller meters are mechanical circulate meters that have been round in irrigation since 1919 and due to this fact make up a big portion of the installed base of irrigation water meters. Fifteen years ago, many individuals thought that propeller meters had been the best meter choice for irrigation – that is not the case today. Expensive propeller meter repairs have led many meter users to look for different flow measurement options. With advances in know-how, electromagnetic flowmeters are now out there for battery power at distant irrigation locations. Many have long battery life, excessive accuracy in tight spaces, and no shifting components to put on down; they’re unaffected by particles. Some electromagnetic flow meters are related in worth to mechanical propeller move meters.
Use the next four tips to help choose the proper flow 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, strain, line measurement, desired sign output and available set up area are all needed to make sure correct flow meter selection.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While mechanical meters may be appropriate for clear water functions the place the flow range is inside the meter’s capability, electromagnetic meters offer the highest accuracy and efficiency in both clear and dirty water functions. With no moving parts, weeds, trash and mud may turn into entangled within the mechanical meter and simply move by way of the magnetic meter.
What are the minimal and most circulate ranges? When choosing a mechanical propeller flow meter, it is crucial to know the minimal and maximum move ranges. A propeller flow meter requires a minimum move rate to permit the bearing assembly and propeller to turn quick sufficient to ensure correct readings. If the flow fee exceeds the mechanical meter’s score, the bearing meeting can endure pricey harm and the meter won’t operate properly. Because there are not any shifting components to put on, electromagnetic flowmeters present larger accuracy over a wider circulate vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters provided for this market are rated to function at temperatures as much as 150 psi and a hundred and forty F. Most of those purposes fall within that temperature and strain range. However, it is at all times sensible to confirm the applying temperature and strain.
What is the size of the line? This will assist determine the style of meter. Both electromagnetic and mechanical gauges can be found in full bore and plug-in configurations. For cost and ease of installation, the plug-in fashion could also be the finest choice for larger line sizes.
Does the meter require a signal output? Some applications require the instrument to send alerts corresponding to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to ship a sign to a remote telemetry system, permitting the irrigator to collect meter data remotely. Signal outputs on propeller move meters are optional and usually require the added value of a transmitter or special digital register that may present 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 signals for a small additional value.
How a lot space is on the market 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 new circulate meter to an present facility, there may be often not sufficient area to accommodate the straight pipe sections required for accurate move measurement. Mechanical propeller meters require more space to install as a result of longer straight run necessities to make sure proper and correct efficiency. Straightening vanes or rectifiers may be mounted in front of the propeller meter to shorten the straight pipe requirement, however can considerably improve the fee and installation labor involved. Typically, a regular full-bore electromagnetic flow meter will match well in tight spaces and measure flow accurately.
How necessary is accuracy?
In general, electromagnetic meters are more correct than mechanical meters. Most electromagnetic flow meters for irrigation present +/-1% circulate over a variety of move charges with no head loss. The most common mechanical meter utilized in irrigation is the propeller flow meter. Propeller meters usually present +/-2% accuracy over a specified move vary and may expertise some head loss. Because there are not any transferring elements to wear, electromagnetic meters can maintain accuracy all through the life of the meter.
What is your meter upkeep schedule?
As with most farm tools, all irrigation move 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 expensive repairs. The number of parts for mechanical gauges has elevated dramatically over the years, and the price to repair an element is sort of as high as the price to replace it. The commonplace warranty on most mechanical propeller gauges is one year.
Electromagnetic meters wouldn’t have any breakable shifting elements and upkeep is often limited to changing the batteries. Many battery-powered electromagnetic flowmeters now offer 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 standard with a two- to five-year warranty, depending on the model.
Electromagnetic or mechanical?
Electromagnetic move meters – also referred to as magnetic meters or just electrometers – operate based on 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, identical to a generator (more flow = extra voltage). An electron coil placed on the surface of the fluid is instantly energized. The magnetic field passes by way of the fluid at right angles, the electrodes measure the altering voltage, and the display unit exhibits the rate and the total. Electromagnetic flow meters have been round for 60 years, just not for irrigation. They are sometimes used for municipal and industrial, water and wastewater functions. In the last 15 years or so, magnetometer technology has advanced so shortly that some can now be battery powered and are excellent for irrigation use. Most electromagnetic flow meters come standard with many mechanical propeller flow meter choices. Many times, the overall out-of-pocket value of an electromagnetic move meter might be lower than the price of a mechanical propeller move meter. To make positive you get your money’s value, contemplate what you need out of your flowmeter – added pulse output, straightened vanes (for tight house installations), high capability bearing assemblies, digital readout, information logging and any other options that might be required with a mechanical propeller meter – after which examine the price to a battery-powered electromagnetic meter, which typically embrace all the choices you need as standard options. In the tip, electromagnetic flowmeters provide: higher accuracy over a wider flow vary, no shifting parts to exchange, durability, no circulate blockage, lengthy battery life, low upkeep prices, longer warranties, and minimal straight pipe requirements for tight area installations. In addition to full bore, some electromagnetic flowmeters are actually available with saddle inserts for simple installation 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 often identified as propeller circulate meters or just propeller flow meters, function according to the following precept – A propeller move meter consists of a rotating device, normally a spiral impeller, located in the air stream. The impeller rotates at a velocity proportional to the speed of the move. As the water flows via the pipe, it rotates the propeller. The rotational movement is then transmitted to the top of the meter by way of a gear or drive cable. The instantaneous and complete move charges can be read on a mechanical or digital meter register. Although they work on the identical precept, these meters can be found in quite lots of mounting configurations to fulfill the wants of the installer: saddle, flange, threaded finish, grooved end, and so on., making set up simpler. Propeller meters present a cheap circulate metering resolution when only mechanical move and total move are required. They usually work nicely in clear water functions, but debris carrying water can harm shifting components. While mechanical propeller move meters were as soon as essentially the most economical possibility for irrigation, that is often no longer the case.
Apure is a designer and producer of a broad range of circulate metering, area instrumentation and course of analyzer products. Since 2007, we now have been providing innovative solutions for users in irrigation, water therapy, groundwater, surface water and chemical processing purposes. Our merchandise have a status for durability and accuracy at aggressive costs and are offered via a community of home and worldwide distributors. We employ just-in-time manufacturing methods and are highly dedicated to steady improvement. Our concentrate on innovation, product value and buyer accessibility has led to almost 20 years of constant 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 flow units
Mass flow price vs volumetric move ratee