Water circulate meters are required by national water businesses for brand spanking new and existing agricultural irrigation functions to measure and manage floor water and groundwater use. There is a growing have to conserve sources and steadiness the water wants of agriculture with different industries, and as the inhabitants continues to grow, residential use is driving water conservation in unprecedented ways.
Irrigation scheduling is the method irrigators use to determine the right frequency and duration of watering. It involves understanding, making use of after which monitoring and controlling the required devices 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 while maximizing crop well being and yield. Good irrigation planning practices embody figuring out how much water is used in every field. A correctly chosen and installed flow meter precisely measures the amount of water applied. Accurate circulate meters are an important tool for implementing a good irrigation program.
The two most typical kinds of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical move meters which have been around in irrigation since 1919 and subsequently make up a large portion of the put in base of irrigation water meters. Fifteen years ago, many individuals thought that propeller meters have been one of the best meter selection for irrigation – that isn’t the case right now. Expensive propeller meter repairs have led many meter customers to look for different circulate measurement options. With advances in expertise, electromagnetic flowmeters at the moment are available for battery power at remote irrigation places. Many have long battery life, high accuracy in tight areas, and no moving components to put on down; they are unaffected by debris. Some electromagnetic circulate meters are related in price to mechanical propeller flow meters.
Use the following 4 suggestions to help select the proper circulate 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, circulate vary, temperature, stress, line measurement, desired sign output and obtainable installation area are all needed to ensure correct flow 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 applications where the flow vary is inside the meter’s functionality, electromagnetic meters supply the very best accuracy and performance in each clear and dirty water applications. With no transferring elements, weeds, trash and mud may become entangled in the mechanical meter and simply move through the magnetic meter.
What are the minimal and maximum flow ranges? When deciding on a mechanical propeller flow meter, it is important to know the minimum and maximum move ranges. A propeller move meter requires a minimal circulate price to allow the bearing assembly and propeller to show fast enough to ensure correct readings. If the move price exceeds the mechanical meter’s ranking, the bearing assembly can suffer expensive damage and the meter is not going to function properly. Because there are no transferring parts to put on, electromagnetic flowmeters provide greater accuracy over a wider flow vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters provided for this market are rated to function at temperatures as a lot as one hundred fifty psi and a hundred and forty F. Most of these functions fall within that temperature and stress vary. However, it is at all times sensible to confirm the appliance temperature and stress.
What is the scale of the line? This will help determine the type of meter. Both electromagnetic and mechanical gauges are available in full bore and plug-in configurations. For cost and ease of set up, the plug-in fashion may be the finest choice for bigger line sizes.
Does the meter require a sign output? Some functions require the instrument to send alerts such as pulses, 4-20mA, or Modbus. In some circumstances, the output is used to send a sign to a distant telemetry system, permitting the irrigator to collect meter information remotely. Signal outputs on propeller move meters are optionally available and often require the added cost of a transmitter or special digital register that may provide the output. Most electromagnetic flow meters have pulse signal output as a normal feature, making them “telemetry system ready” and may present Modbus or 4-20mA output alerts for a small further value.
How much area is available to put in the meter? The straight pipe requirements for circulate meters are costly when it comes to materials and set up labor. In the case of adding a new circulate meter to an current facility, there is typically not sufficient area to accommodate the straight pipe sections required for correct flow 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 can be mounted in entrance of the propeller meter to shorten the straight pipe requirement, but can considerably enhance the fee and set up labor involved. Typically, a regular full-bore electromagnetic circulate meter will fit properly in tight areas and measure move precisely.
How important is accuracy?
In basic, electromagnetic meters are extra correct than mechanical meters. Most electromagnetic circulate meters for irrigation provide +/-1% move over a variety of circulate charges with no head loss. The most typical mechanical meter used in irrigation is the propeller circulate meter. Propeller meters typically present +/-2% accuracy over a specified flow range and may expertise some head loss. Because there aren’t any moving components to put on, electromagnetic meters can maintain accuracy all through the life of the meter.
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As with most farm equipment, all irrigation flow meters require attention sooner or later.
Mechanical propeller meters have shifting parts, similar to propellers, bearings and mechanical registers, that may wear out, inflicting interruptions in measurement information and leading to costly repairs. The number of parts for mechanical gauges has elevated dramatically through the years, and the fee to restore a part is nearly as excessive as the fee to switch it. The commonplace guarantee on most mechanical propeller gauges is one yr.
Electromagnetic meters wouldn’t have any breakable shifting components and maintenance is usually restricted to replacing the batteries. Many battery-powered electromagnetic flowmeters now provide a 5-year battery life, and the value of battery replacement 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 warranty, relying on the model.
Electromagnetic or mechanical?
Electromagnetic circulate meters – also referred to as magnetic meters or simply electrometers – function in accordance with Faraday’s Law – if a conductive fluid (such as irrigation water) passes by way of a magnetic area, a small voltage is generated. The motion of the conductive fluid via the sphere generates a small amount of electrical power, identical to a generator (more move = extra voltage). An electron coil placed on the outside 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 reveals the rate and the whole. Electromagnetic move meters have been around 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 advanced so shortly 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 instances, the overall out-of-pocket value of an electromagnetic move meter might be less than the value of a mechanical propeller move meter. To ensure you get your money’s value, consider what you want from your flowmeter – added pulse output, straightened vanes (for tight house installations), high capacity bearing assemblies, digital readout, knowledge logging and any other options which may be required with a mechanical propeller meter – after which evaluate the price to a battery-powered electromagnetic meter, which typically include all of the options you need as normal options. In the end, electromagnetic flowmeters provide: larger accuracy over a wider move range, no moving parts to exchange, sturdiness, no flow blockage, long battery life, low maintenance prices, longer warranties, and minimal straight pipe necessities for tight house installations. In addition to full bore, some electromagnetic flowmeters are now obtainable 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 often known as propeller flow meters or just propeller circulate meters, function according to the next precept – A propeller move meter consists of a rotating system, usually a spiral impeller, located in the air stream. The impeller rotates at a speed proportional to the rate of the flow. As the water flows through 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 flow charges can be learn on a mechanical or digital meter register. Although they work on the identical precept, these meters can be found in quite a lot of mounting configurations to satisfy the wants of the installer: saddle, flange, threaded end, grooved finish, and so forth., making set up easier. Propeller meters present an economical circulate metering solution when only mechanical move and complete flow are required. They sometimes work well in clear water purposes, but particles carrying water can damage shifting elements. While mechanical propeller flow meters have been as quickly as probably the most economical option for irrigation, this is often no longer the case.
Apure is a designer and producer of a variety of move metering, area instrumentation and course of analyzer products. Since 2007, we have been providing progressive solutions for users in irrigation, water treatment, groundwater, surface water and chemical processing purposes. Our merchandise have a popularity for sturdiness and accuracy at aggressive prices and are sold via a community of home and international distributors. We employ just-in-time manufacturing strategies and are highly committed to continuous enchancment. Our concentrate on innovation, product value and buyer accessibility has led to nearly two decades of consistent progress. Feel free to contact us for technical, citation or distributor help.
More articles on flowmeters:
Difference between move meter and flow transmitter
Flow meter calibration
Useful details about flow items
Mass move fee vs volumetric flow feee
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Water move meters are required by national water agencies for model new and present agricultural irrigation purposes to measure and handle 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 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 discover out the proper frequency and length of watering. It involves understanding, applying after which monitoring and controlling the required devices corresponding to 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 well being and yield. Good irrigation planning practices embody figuring out how a lot water is used in each field. A correctly selected and put in flow meter precisely measures the amount of water utilized. Accurate flow meters are an essential tool for implementing a great irrigation program.
The two most common forms of irrigation circulate meters are electromagnetic meters and propeller meters. Propeller meters are mechanical move meters which have been around in irrigation since 1919 and subsequently make up a large portion of the installed base of irrigation water meters. Fifteen years in the past, many individuals thought that propeller meters have been one of the best meter choice for irrigation – that is not the case today. Expensive propeller meter repairs have led many meter customers to search for other circulate measurement choices. With advances in technology, electromagnetic flowmeters at the second are out there for battery energy at remote irrigation areas. Many have lengthy battery life, high accuracy in tight areas, and no shifting elements to put on out; they are unaffected by debris. Some electromagnetic flow meters are related in value to mechanical propeller circulate meters.
Use the next 4 tips to assist choose the proper 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 range, temperature, strain, line measurement, desired signal output and out there installation space are all essential to make sure proper flow meter selection.
What is the application? Is it groundwater, surface water, pond water or manure slurry lagoon water? While mechanical meters could also be suitable for clear water applications the place the circulate vary is throughout the meter’s functionality, electromagnetic meters offer the best accuracy and efficiency in each clear and soiled water functions. With no transferring parts, weeds, trash and mud could turn out to be entangled in the mechanical meter and easily move via the magnetic meter.
What are the minimum and maximum flow ranges? When choosing a mechanical propeller move meter, it is critical to know the minimal and maximum move ranges. A propeller flow meter requires a minimum move fee to allow the bearing meeting and propeller to turn fast enough to ensure accurate readings. If the move price exceeds the mechanical meter’s rating, the bearing assembly can undergo expensive injury and the meter is not going to operate correctly. Because there are not any transferring parts to wear, electromagnetic flowmeters provide greater accuracy over a wider circulate vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters provided for this market are rated to operate at temperatures as a lot as one hundred fifty psi and one hundred forty F. Most of these functions fall within that temperature and stress vary. However, it is at all times wise to verify the application temperature and pressure.
What is the size of the line? This will help determine the fashion 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 additionally be the solely option for bigger line sizes.
Does the meter require a sign output? Some applications require the instrument to ship signals corresponding to pulses, 4-20mA, or Modbus. In some cases, the output is used to send a signal to a distant telemetry system, allowing the irrigator to collect meter data remotely. Signal outputs on propeller circulate meters are optional and often require the added value of a transmitter or special digital register that can provide the output. Most electromagnetic move meters have pulse signal output as a normal function, making them “telemetry system ready” and might provide Modbus or 4-20mA output signals for a small further cost.
How a lot space is out there to put in the meter? The straight pipe necessities for move meters are costly when it comes to supplies and set up labor. In the case of including a new circulate meter to an present facility, there is often not sufficient area to accommodate the straight pipe sections required for correct move measurement. Mechanical propeller meters require extra space to put in due to the longer straight run necessities to make sure correct and accurate efficiency. Straightening vanes or rectifiers can be mounted in front of the propeller meter to shorten the straight pipe requirement, however can considerably increase the cost and installation labor involved. Typically, a normal full-bore electromagnetic circulate meter will fit nicely in tight areas and measure circulate accurately.
How necessary is accuracy?
In common, electromagnetic meters are more correct than mechanical meters. Most electromagnetic circulate meters for irrigation present +/-1% circulate over a variety of flow rates with no head loss. The commonest mechanical meter used in irrigation is the propeller move meter. Propeller meters typically present +/-2% accuracy over a specified move vary and will expertise some head loss. Because there aren’t any shifting elements to wear, electromagnetic meters can preserve accuracy throughout the lifetime of the meter.
What is your meter maintenance schedule?
As with most farm gear, all irrigation flow meters require attention sooner or later.
Mechanical propeller meters have shifting components, such as propellers, bearings and mechanical registers, that can wear out, causing interruptions in measurement data and resulting in pricey repairs. The number of components for mechanical gauges has elevated dramatically through the years, and the fee to repair an element is nearly as excessive as the fee to replace it. The standard warranty on most mechanical propeller gauges is one yr.
Electromagnetic meters don’t have any breakable shifting components and upkeep is usually restricted to replacing the batteries. Many battery-powered electromagnetic flowmeters now provide a 5-year battery life, and the worth of battery substitute 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 move meters – also known as magnetic meters or just electrometers – operate according to 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 by way of the sector generates a small amount of electrical vitality, similar to a generator (more move = more voltage). An electron coil placed on the outside of the fluid is immediately energized. The magnetic subject passes via the fluid at right angles, the electrodes measure the changing voltage, and the display unit reveals the rate and the total. Electromagnetic circulate meters have been around 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 know-how has evolved so rapidly that some can now be battery powered and are excellent for irrigation use. Most electromagnetic circulate meters come normal with many mechanical propeller flow meter options. Many times, the overall out-of-pocket price of an electromagnetic circulate meter will be less than the worth of a mechanical propeller flow meter. To make certain you get your money’s worth, think about what you need from your flowmeter – added pulse output, straightened vanes (for tight space installations), high capability bearing assemblies, digital readout, data logging and any other choices that may be required with a mechanical propeller meter – and then evaluate the value to a battery-powered electromagnetic meter, which usually embrace all the choices you need as normal features. In the end, electromagnetic flowmeters supply: larger accuracy over a wider flow vary, no transferring parts to switch, durability, no flow blockage, long battery life, low maintenance prices, longer warranties, and minimal straight pipe requirements for tight space installations. In addition to full bore, some electromagnetic flowmeters are actually out there with saddle inserts for simple set up in new installations and retrofit/replacement of current saddle propeller meters.
AYT Digital Liquid Magnetic Flow Meter
Learn More AYT Digital Liquid Magnetic Flow Meter
AFT Split Type Electromagnetic Flow Meter
Learn More AFT Split Type Electromagnetic Flow Meter
ACT Insertion Type Magnetic Flowmeter
Learn More ACT Insertion Type Magnetic Flowmeter
Mechanical Propeller Meters – Also generally identified as propeller move meters or simply propeller circulate meters, function in accordance with the next principle – A propeller circulate meter consists of a rotating device, often a spiral impeller, situated within the air stream. The impeller rotates at a speed proportional to the speed of the flow. As the water flows through the pipe, it rotates the propeller. The rotational movement is then transmitted to the head of the meter through a gear or drive cable. The instantaneous and complete flow charges could 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 wants of the installer: saddle, flange, threaded finish, grooved end, etc., making set up simpler. Propeller meters provide a cheap move metering resolution when solely mechanical move and complete flow are required. They usually work properly in clear water functions, but debris carrying water can damage transferring elements. While mechanical propeller move meters were as soon as the most economical option for irrigation, that is normally now not the case.
Apure is a designer and producer of a extensive range of circulate metering, area instrumentation and process analyzer merchandise. Since 2007, we’ve been providing progressive options for customers in irrigation, water remedy, groundwater, surface water and chemical processing purposes. Our products have a popularity for sturdiness and accuracy at aggressive prices and are bought through a community of domestic and international distributors. We employ just-in-time manufacturing methods and are extremely dedicated to steady enchancment. Our give consideration to innovation, product value and buyer accessibility has led to nearly 20 years of constant growth. Feel free to contact us for technical, quotation or distributor help.
More articles on flowmeters:
Difference between circulate meter and flow transmitter
Flow meter calibration
Useful information about move units
Mass move fee vs volumetric move feee