Water circulate meters are required by nationwide water agencies for new and existing agricultural irrigation purposes to measure and manage floor water and groundwater use. There is a rising have to conserve sources and balance the water wants of agriculture with other industries, and as a end result of the inhabitants continues to grow, residential use is driving water conservation in unprecedented methods.
Irrigation scheduling is the process irrigators use to determine the proper frequency and period of watering. It involves understanding, applying after which monitoring and controlling the mandatory devices corresponding to soil moisture sensors, rain gauges and circulate meters to ensure efficient water use in crop production. This minimizes water waste and helps water conservation while maximizing crop health and yield. Good irrigation planning practices embrace knowing how much water is used in every subject. A correctly chosen and put in circulate meter accurately measures the amount of water utilized. Accurate move meters are an necessary software for implementing a great irrigation program.
The two most typical types of irrigation flow meters are electromagnetic meters and propeller meters. Propeller meters are mechanical move meters which 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 in the past, many individuals thought that propeller meters had been the most effective meter choice for irrigation – that isn’t the case today. Expensive propeller meter repairs have led many meter users to look for other move measurement options. With advances in know-how, electromagnetic flowmeters are actually out there for battery power at remote irrigation locations. Many have long battery life, excessive accuracy in tight spaces, and no moving parts to put on down; they are unaffected by debris. Some electromagnetic circulate meters are comparable in worth to mechanical propeller move meters.
Use the following four ideas to help choose the proper flow 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, circulate vary, temperature, stress, line measurement, desired sign output and obtainable installation space are all needed to ensure proper circulate meter selection.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While mechanical meters could also be appropriate for clear water purposes where the circulate vary is within the meter’s capability, electromagnetic meters offer the best accuracy and performance in both clear and dirty water functions. With no moving components, weeds, trash and dust could turn out to be entangled within the mechanical meter and simply flow through the magnetic meter.
What are the minimal and most move ranges? When selecting a mechanical propeller move meter, it’s crucial to know the minimum and most move ranges. A propeller circulate meter requires a minimal circulate price to permit the bearing assembly and propeller to show fast enough to make sure accurate readings. If the circulate rate exceeds the mechanical meter’s rating, the bearing assembly can undergo expensive injury and the meter will not perform properly. Because there aren’t any shifting parts to wear, electromagnetic flowmeters provide greater accuracy over a wider move range than mechanical meters.
What are the temperatures and pressures? Most flowmeters provided for this market are rated to operate at temperatures up to a hundred and fifty psi and 140 F. Most of these applications fall inside that temperature and strain range. However, it is at all times clever to confirm the application temperature and stress.
What is the scale of the line? This will assist 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 could additionally be the only option for bigger line sizes.
Does the meter require a signal output? Some applications require the instrument to send indicators similar 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 gather meter information remotely. Signal outputs on propeller flow meters are optional and usually require the added value of a transmitter or particular digital register that may provide the output. Most electromagnetic move meters have pulse sign output as a normal characteristic, making them “telemetry system ready” and can provide Modbus or 4-20mA output indicators for a small additional price.
How a lot house is out there to install the meter? The straight pipe requirements for move meters are costly by method of materials and installation labor. In the case of adding a brand new move meter to an current facility, there’s usually not enough house to accommodate the straight pipe sections required for accurate flow measurement. Mechanical propeller meters require more room to install as a result of longer straight run requirements to ensure 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 increase the price and installation labor concerned. Typically, a normal full-bore electromagnetic flow meter will fit nicely in tight spaces and measure move precisely.
How necessary is accuracy?
In general, electromagnetic meters are more correct than mechanical meters. Most electromagnetic circulate meters for irrigation present +/-1% move over a broad range of move charges with no head loss. The most typical mechanical meter used in irrigation is the propeller flow meter. Propeller meters typically provide +/-2% accuracy over a specified move vary and will experience some head loss. Because there are not any shifting parts to wear, electromagnetic meters can keep accuracy all through the lifetime of the meter.
What is your meter maintenance schedule?
As with most farm tools, all irrigation flow meters require attention in some unspecified time within the future.
Mechanical propeller meters have moving parts, similar to propellers, bearings and mechanical registers, that can wear out, inflicting interruptions in measurement knowledge and resulting in pricey repairs. The variety of parts for mechanical gauges has elevated dramatically over the years, and the price to restore an element is nearly as high as the price to switch it. The standard guarantee on most mechanical propeller gauges is one yr.
Electromagnetic meters wouldn’t have any breakable shifting components and maintenance is normally limited 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 cost associated with 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 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 subject, 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 flow = more voltage). An electron coil placed on the outside of the fluid is immediately energized. The magnetic area passes by way of the fluid at right angles, the electrodes measure the changing voltage, and the show unit reveals the rate and the whole. Electromagnetic move meters have been around for 60 years, just not for irrigation. They are usually used for municipal and industrial, water and wastewater purposes. In the last 15 years or so, magnetometer know-how has advanced so rapidly that some can now be battery powered and are good for irrigation use. Most electromagnetic flow meters come commonplace with many mechanical propeller circulate meter options. Many occasions, the overall out-of-pocket cost of an electromagnetic move meter might be lower than the price of a mechanical propeller circulate meter. To make sure you get your money’s value, think about what you need from your flowmeter – added pulse output, straightened vanes (for tight house installations), excessive capacity bearing assemblies, digital readout, knowledge logging and another options that may be required with a mechanical propeller meter – after which evaluate the price to a battery-powered electromagnetic meter, which generally include all of the options you want as standard features. In the end, electromagnetic flowmeters provide: higher accuracy over a wider flow range, no shifting parts to replace, durability, no circulate blockage, lengthy battery life, low upkeep costs, longer warranties, and minimal straight pipe requirements for tight house installations. In addition to full bore, some electromagnetic flowmeters at the moment are out there with saddle inserts for easy 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 generally recognized as propeller flow meters or just propeller flow meters, function based on the following precept – A propeller circulate meter consists of a rotating device, normally a spiral impeller, positioned in the air stream. The impeller rotates at a velocity proportional to the rate of the flow. As the water flows through 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 complete flow rates may be learn on a mechanical or digital meter register. Although they work on the identical precept, these meters are available in quite lots of mounting configurations to meet the needs of the installer: saddle, flange, threaded finish, grooved finish, etc., making installation easier. Propeller meters provide a cheap flow metering resolution when only mechanical flow and complete flow are required. They typically work properly in clear water purposes, however debris carrying water can harm shifting elements. While mechanical propeller circulate meters were as soon as essentially the most economical choice for irrigation, this is often no longer the case.
Apure is a designer and producer of a variety of flow metering, subject instrumentation and course of analyzer products. Since 2007, we now have been offering revolutionary solutions for customers in irrigation, water remedy, groundwater, floor water and chemical processing purposes. Our products have a reputation for sturdiness and accuracy at competitive prices and are sold via a community of home and international distributors. We make use of just-in-time manufacturing strategies and are highly committed to continuous enchancment. Our focus on innovation, product worth and customer accessibility has led to simply about twenty years of constant progress. Feel free to contact us for technical, quotation or distributor help.
More articles on flowmeters:
Difference between flow meter and move transmitter
Flow meter calibration
Useful information about circulate items
Mass circulate fee vs volumetric flow ratee
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Water move meters are required by nationwide water businesses for model spanking new and current agricultural irrigation functions to measure and handle surface water and groundwater use. There is a growing need to conserve assets and balance the water needs of agriculture with different industries, and because the population continues to grow, residential use is driving water conservation in unprecedented ways.
Irrigation scheduling is the method irrigators use to find out the right frequency and duration of watering. It entails understanding, applying after which monitoring and controlling the necessary instruments such as soil moisture sensors, rain gauges and circulate meters to ensure environment friendly water use in crop production. This minimizes water waste and helps water conservation while maximizing crop health and yield. Good irrigation planning practices embody figuring out how a lot water is utilized in every subject. A properly chosen and installed circulate meter precisely measures the amount of water utilized. Accurate circulate meters are an essential tool for implementing an excellent irrigation program.
The two most typical forms of irrigation move meters are electromagnetic meters and propeller meters. Propeller meters are mechanical flow meters which were round in irrigation since 1919 and therefore make up a big portion of the installed base of irrigation water meters. Fifteen years in the past, many people thought that propeller meters had been the best meter selection for irrigation – that isn’t the case right now. Expensive propeller meter repairs have led many meter users to search for other flow measurement options. With advances in technology, electromagnetic flowmeters are actually obtainable for battery power at remote irrigation areas. Many have long battery life, high accuracy in tight spaces, and no shifting elements to put on down; they are unaffected by debris. Some electromagnetic flow meters are related in price to mechanical propeller circulate meters.
Use the next 4 suggestions to assist 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, flow range, temperature, stress, line dimension, desired signal output and available installation space are all needed to make sure correct flow meter choice.
What is the application? Is it groundwater, floor water, pond water or manure slurry lagoon water? While mechanical meters may be suitable for clear water purposes the place the move range is inside the meter’s functionality, electromagnetic meters provide the best accuracy and performance in both clear and soiled water purposes. With no moving parts, weeds, trash and mud might become entangled in the mechanical meter and easily circulate by way of the magnetic meter.
What are the minimal and maximum flow ranges? When selecting a mechanical propeller flow meter, it’s important to know the minimum and maximum move ranges. A propeller flow meter requires a minimal flow fee to allow the bearing assembly and propeller to show quick enough to make sure correct readings. If the move rate exceeds the mechanical meter’s rating, the bearing assembly can suffer pricey harm and the meter is not going to perform correctly. Because there are no moving parts to put on, electromagnetic flowmeters provide higher accuracy over a wider move vary than mechanical meters.
What are the temperatures and pressures? Most flowmeters provided for this market are rated to operate at temperatures up to one hundred fifty psi and a hundred and forty F. Most of these applications fall inside that temperature and strain vary. However, it’s at all times clever to verify the application temperature and stress.
What is เกจวัดแรงดัน 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 price and ease of set up, the plug-in type could additionally be the finest choice for bigger line sizes.
Does the meter require a signal output? Some applications require the instrument to send indicators similar to pulses, 4-20mA, or Modbus. In some circumstances, the output is used to send a signal to a distant telemetry system, allowing the irrigator to gather meter information remotely. Signal outputs on propeller circulate meters are optionally available and normally require the added value of a transmitter or particular digital register that can present the output. Most electromagnetic move meters have pulse sign output as a regular function, making them “telemetry system ready” and might provide Modbus or 4-20mA output indicators for a small further price.
How a lot house is out there to put in the meter? The straight pipe necessities for move meters are expensive by means of materials and installation labor. In the case of adding a new flow meter to an present facility, there might be typically not sufficient space to accommodate the straight pipe sections required for accurate circulate measurement. Mechanical propeller meters require extra space to install because of the longer straight run requirements to ensure proper and correct performance. Straightening vanes or rectifiers may be mounted in front of the propeller meter to shorten the straight pipe requirement, however can considerably increase the cost and installation labor concerned. Typically, a normal full-bore electromagnetic circulate meter will match properly in tight areas and measure flow accurately.
How necessary is accuracy?
In common, electromagnetic meters are more accurate than mechanical meters. Most electromagnetic flow meters for irrigation present +/-1% circulate over a broad range of move charges with no head loss. The commonest mechanical meter used in irrigation is the propeller move meter. Propeller meters usually provide +/-2% accuracy over a specified circulate range and will expertise some head loss. Because there aren’t any moving parts to wear, electromagnetic meters can keep accuracy all through the lifetime of the meter.
What is your meter upkeep schedule?
As with most farm equipment, all irrigation circulate meters require consideration sooner or later.
Mechanical propeller meters have shifting parts, corresponding to propellers, bearings and mechanical registers, that may wear out, inflicting interruptions in measurement knowledge and resulting in expensive repairs. The number of parts for mechanical gauges has elevated dramatically over time, and the cost to repair a component is almost as excessive as the price to switch it. The commonplace guarantee on most mechanical propeller gauges is one year.
Electromagnetic meters wouldn’t have any breakable moving components and maintenance is usually restricted to changing the batteries. Many battery-powered electromagnetic flowmeters now supply a 5-year battery life, and the value of battery replacement is a fraction of the cost related to typical mechanical meter repairs. In addition, most electromagnetic flowmeters come normal with a two- to five-year warranty, relying on the brand.
Electromagnetic or mechanical?
Electromagnetic move meters – also called magnetic meters or simply electrometers – function based on Faraday’s Law – if a conductive fluid (such as irrigation water) passes through a magnetic subject, a small voltage is generated. The movement of the conductive fluid through the sphere generates a small amount of electrical vitality, similar to a generator (more circulate = more voltage). An electron coil positioned on the skin of the fluid is immediately energized. The magnetic subject passes through the fluid at proper angles, the electrodes measure the changing voltage, and the display unit reveals 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 purposes. In the final 15 years or so, magnetometer know-how has evolved so shortly that some can now be battery powered and are perfect for irrigation use. Most electromagnetic move meters come normal with many mechanical propeller flow meter choices. Many occasions, the overall out-of-pocket value of an electromagnetic flow meter shall be lower than the value of a mechanical propeller move meter. To make positive you get your money’s price, think about what you want from your flowmeter – added pulse output, straightened vanes (for tight house installations), high capability bearing assemblies, digital readout, data logging and another choices which might be required with a mechanical propeller meter – and then compare the price to a battery-powered electromagnetic meter, which usually embody all the options you need as normal options. In the top, electromagnetic flowmeters offer: higher accuracy over a wider move vary, no moving parts to exchange, sturdiness, no flow 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 now obtainable with saddle inserts for easy 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 generally recognized as propeller circulate meters or simply propeller flow meters, operate according to the next principle – A propeller flow meter consists of a rotating device, 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 by way of the pipe, it rotates the propeller. The rotational movement is then transmitted to the pinnacle of the meter by way of a gear or drive cable. The instantaneous and complete move rates may be learn on a mechanical or digital meter register. Although they work on the identical principle, these meters are available in quite a lot of mounting configurations to meet the needs of the installer: saddle, flange, threaded end, grooved end, and so on., making set up easier. Propeller meters provide an economical flow metering solution when only mechanical circulate and total move are required. They sometimes work properly in clear water applications, but debris carrying water can damage shifting elements. While mechanical propeller move meters had been once essentially the most economical choice for irrigation, that is normally not the case.
Apure is a designer and manufacturer of a variety of circulate metering, area instrumentation and course of analyzer products. Since 2007, we have been providing progressive options for customers in irrigation, water therapy, groundwater, floor water and chemical processing purposes. Our products have a status for sturdiness and accuracy at aggressive costs and are sold through a network of domestic and worldwide distributors. We employ just-in-time manufacturing strategies and are highly dedicated to steady improvement. Our concentrate on innovation, product worth and buyer accessibility has led to just about 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 circulate transmitter
Flow meter calibration
Useful information about flow models
Mass circulate rate vs volumetric flow feee