{"id":22330,"date":"2024-09-06T08:29:15","date_gmt":"2024-09-06T08:29:15","guid":{"rendered":"https:\/\/www.metlaninst.com\/?p=22330"},"modified":"2025-10-30T09:44:43","modified_gmt":"2025-10-30T09:44:43","slug":"caudalimetro-eletromagnetico-e-principios-de-funcionamento","status":"publish","type":"post","link":"https:\/\/metlaninst.com\/pt\/caudalimetro-eletromagnetico-e-principios-de-funcionamento\/","title":{"rendered":"O que \u00e9 o medidor de caudal eletromagn\u00e9tico e como funciona"},"content":{"rendered":"<p>A medi\u00e7\u00e3o de caudal \u00e9 um aspeto crucial de v\u00e1rios processos industriais, assegurando um controlo e gest\u00e3o precisos dos l\u00edquidos. Entre os diferentes <a href=\"https:\/\/metlaninst.com\/pt\/tipos-de-medidores-de-caudal-de-topo-seus-principios-de-funcionamento-vantagens-e-desvantagens\/\" data-type=\"link\" data-id=\"https:\/\/www.metlaninst.com\/top-flow-meter-types-their-working-principles-advantages-and-disadvantages\/\">tipos de medidores de caudal<\/a> dispon\u00edveis, os medidores de caudal electromagn\u00e9ticos, ou medidores magn\u00e9ticos, destacam-se pela sua precis\u00e3o, fiabilidade e aplicabilidade em diversos contextos. Desde a sua inven\u00e7\u00e3o nos anos 50, os medidores de caudal electromagn\u00e9ticos tornaram-se um padr\u00e3o da ind\u00fastria para medir o caudal de l\u00edquidos condutores. A natureza n\u00e3o intrusiva desta tecnologia, a aus\u00eancia de pe\u00e7as m\u00f3veis e a ampla compatibilidade com v\u00e1rios tipos de l\u00edquidos fazem dela a escolha preferida no tratamento de \u00e1gua, processamento qu\u00edmico, alimentos e bebidas e outras ind\u00fastrias.<\/p><p>Se tamb\u00e9m estiver interessado em medidor de caudal de v\u00f3rtice, aqui est\u00e1 <a href=\"https:\/\/metlaninst.com\/pt\/o-que-sao-os-medidores-de-caudal-de-vortice-e-como-funcionam\/\" data-type=\"link\" data-id=\"https:\/\/www.metlaninst.com\/what-is-vortex-flow-meters-how-does-it-work\/\">um guia completo para medidores de caudal de v\u00f3rtice<\/a>.<\/p><div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>\u00cdndice<\/h2><nav><ul><li><a href=\"#how-does-the-magnetic-flow-meter-work\">How does a magnetic flow meter work?<\/a><\/li><li><a href=\"#benefits-of-electromagnetic-flow-meters\">Vantagens dos medidores de caudal electromagn\u00e9ticos<\/a><\/li><li><a href=\"#disadvantages-of-electromagnetic-flow-meters\">Problems of Magnetic Flow Meters<\/a><\/li><li><a href=\"#common-types-of-electromagnetic-flow-meters\">Tipos comuns de medidores de caudal electromagn\u00e9ticos<\/a><\/li><li><a href=\"#h\">How to Choose the Right Magnetic Flow Meter<\/a><ul><\/ul><\/li><li><a href=\"#applications-of-electromagnetic-flow-meters\">Aplica\u00e7\u00f5es dos medidores de caudal electromagn\u00e9ticos<\/a><\/li><\/ul><\/nav><\/div><h2 class=\"wp-block-heading\" id=\"how-does-the-magnetic-flow-meter-work\"><strong>How does a magnetic flow meter work<\/strong>?<\/h2><div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:30% auto\"><figure class=\"wp-block-media-text__media\"><img fetchpriority=\"high\" decoding=\"async\" width=\"607\" height=\"1024\" src=\"http:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle-607x1024.jpg\" alt=\"princ\u00edpio de funcionamento do caudal\u00edmetro magn\u00e9tico\" class=\"wp-image-27585 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle-607x1024.jpg 607w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle-178x300.jpg 178w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle-768x1296.jpg 768w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle-340x574.jpg 340w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle-7x12.jpg 7w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/magnetic-flow-meter-working-principle.jpg 800w\" sizes=\"(max-width: 607px) 100vw, 607px\" \/><\/figure><div class=\"wp-block-media-text__content\"><p>Electromagnetic flow meters, or magmeters, measure fluid flow using a combination of a transmitter and a sensor. The sensor is installed inline within the pipe and detects an induced voltage generated as the fluid passes through a magnetic field. This magnetic field is created by a set of coils in the meter, which are powered by the transmitter. As the fluid flows through the field, the positively and negatively charged particles in the fluid are separated, producing a voltage between a pair of electrodes. This induced voltage is then transmitted to the transmitter, which converts it into a measurable flow velocity. The underlying principle of this measurement is Faraday\u2019s Law, expressed mathematically as E = k \u00d7 B \u00d7 D \u00d7 V, where the induced voltage (E) is directly proportional to the fluid\u2019s velocity (V) moving through the magnetic field (B). Using this velocity and the cross-sectional area of the pipe, the volumetric flow rate of the fluid can be accurately calculated.<\/p><\/div><\/div><p><strong>Numa instala\u00e7\u00e3o t\u00edpica de um caudal\u00edmetro eletromagn\u00e9tico:<\/strong><\/p><ul class=\"wp-block-list\"><li><strong>Structure: <\/strong>O medidor de caudal consiste numa sec\u00e7\u00e3o de tubo n\u00e3o magn\u00e9tico e n\u00e3o condutor (conhecido como tubo de caudal), muitas vezes feito de a\u00e7o inoxid\u00e1vel ou outros materiais dur\u00e1veis, revestido com um material isolante como PTFE ou borracha. No interior do tubo, existem dois el\u00e9ctrodos colocados diametralmente opostos um ao outro. Estes el\u00e9ctrodos entram em contacto com o l\u00edquido que flui.<\/li>\n\n<li><strong>Magnetic Field Generation: <\/strong>As bobinas que rodeiam o tubo de fluxo geram um campo magn\u00e9tico perpendicular \u00e0 dire\u00e7\u00e3o do fluxo do fluido. Quando o l\u00edquido condutor se move atrav\u00e9s deste campo magn\u00e9tico, \u00e9 induzida uma for\u00e7a electromagn\u00e9tica (fem) entre os el\u00e9ctrodos.<\/li>\n\n<li><strong>Voltage Measurement: <\/strong>A tens\u00e3o induzida \u00e9 captada pelos el\u00e9ctrodos e enviada para um transmissor, que converte este sinal de tens\u00e3o num caudal utilizando a equa\u00e7\u00e3o derivada da Lei de Faraday:&nbsp;<em>&nbsp;E = k \u00d7 B \u00d7 D \u00d7 V em que E \u00e9 a tens\u00e3o induzida, k \u00e9 uma constante, B \u00e9 a intensidade do campo magn\u00e9tico, D \u00e9 o di\u00e2metro interno do tubo e V \u00e9 a velocidade do l\u00edquido. Dado que B e D s\u00e3o constantes para um dado medidor de caudal, a tens\u00e3o E \u00e9 diretamente proporcional \u00e0 velocidade do fluido V<\/em>.<\/li>\n\n<li><strong>Flow Rate Calculation: <\/strong>O transmissor processa o sinal de tens\u00e3o e fornece um <strong><a href=\"https:\/\/metlaninst.com\/pt\/compreender-o-caudal-massico-e-o-caudal-volumetrico\/\" data-type=\"link\" data-id=\"https:\/\/www.metlaninst.com\/understanding-mass-flow-rate-and-volumetric-flow-rate\/\">caudal volum\u00e9trico<\/a><\/strong>que \u00e9 depois visualizada numa interface digital ou integrada num sistema de controlo.<\/li>\n\n<li><strong>Zero Stability: <\/strong>Uma das principais carater\u00edsticas dos contadores magn\u00e9ticos \u00e9 a sua estabilidade zero. Se n\u00e3o houver fluxo, a tens\u00e3o induzida deve ser idealmente zero. Esta carater\u00edstica torna os contadores magn\u00e9ticos excecionalmente precisos, uma vez que qualquer sinal de tens\u00e3o em condi\u00e7\u00f5es de aus\u00eancia de fluxo \u00e9 normalmente tratado como ru\u00eddo e calibrado.<\/li><\/ul><figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"750\" height=\"422\" src=\"https:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Working-Principle-of-Electromagnetic-Flow-Meters.jpg\" alt=\"Princ\u00edpio de funcionamento dos medidores de caudal electromagn\u00e9ticos\" class=\"wp-image-22331\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Working-Principle-of-Electromagnetic-Flow-Meters.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Working-Principle-of-Electromagnetic-Flow-Meters-300x169.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Working-Principle-of-Electromagnetic-Flow-Meters-340x191.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><h2 class=\"wp-block-heading\" id=\"benefits-of-electromagnetic-flow-meters\"><strong>Vantagens dos medidores de caudal electromagn\u00e9ticos<\/strong><\/h2><ol class=\"wp-block-list\"><li><strong>High Accuracy and Precision: <\/strong>Os medidores de caudal electromagn\u00e9ticos oferecem n\u00edveis de precis\u00e3o elevados, frequentemente entre \u00b10,2% e \u00b10,5% da leitura, o que pode ser cr\u00edtico em aplica\u00e7\u00f5es em que as medi\u00e7\u00f5es precisas s\u00e3o essenciais, como na dosagem de produtos qu\u00edmicos ou no fabrico de produtos farmac\u00eauticos.<\/li>\n\n<li><strong>Sem partes m\u00f3veis: <\/strong>A aus\u00eancia de pe\u00e7as m\u00f3veis no interior do tubo de fluxo minimiza o risco de desgaste mec\u00e2nico, resultando em menores custos de manuten\u00e7\u00e3o e maior durabilidade. Este design tamb\u00e9m reduz as hip\u00f3teses de perda de press\u00e3o, tornando-os altamente eficientes.<\/li>\n\n<li><strong>Vasta gama de aplica\u00e7\u00f5es: <\/strong>Os medidores magn\u00e9ticos s\u00e3o vers\u00e1teis e podem ser utilizados para v\u00e1rios tipos de fluidos condutores, incluindo lamas, \u00e1gua suja, produtos qu\u00edmicos corrosivos e fluidos viscosos. Esta ampla aplicabilidade torna-os ideais para ind\u00fastrias como o tratamento de \u00e1guas residuais, minera\u00e7\u00e3o e processamento de alimentos e bebidas.<\/li>\n\n<li><strong>Bi-directional Measurement Capability: <\/strong>Estes medidores podem medir o caudal em ambas as direc\u00e7\u00f5es, o que \u00e9 valioso em aplica\u00e7\u00f5es em que a dire\u00e7\u00e3o do caudal pode mudar ou em que \u00e9 necess\u00e1rio monitorizar v\u00e1rias direc\u00e7\u00f5es.<\/li>\n\n<li><strong>Insensitive to Fluid Properties: <\/strong>Os caudal\u00edmetros magn\u00e9ticos n\u00e3o s\u00e3o afectados por altera\u00e7\u00f5es na densidade, viscosidade, temperatura ou press\u00e3o do fluido. Esta vantagem assegura medi\u00e7\u00f5es consistentes e fi\u00e1veis, mesmo em condi\u00e7\u00f5es de processo vari\u00e1veis.<\/li>\n\n<li><strong>Easy to Maintain: <\/strong>Sem componentes mec\u00e2nicos e com o m\u00ednimo de pe\u00e7as que entram em contacto com o l\u00edquido, a manuten\u00e7\u00e3o \u00e9 simples. A calibra\u00e7\u00e3o peri\u00f3dica e a limpeza dos el\u00e9ctrodos s\u00e3o muitas vezes tudo o que \u00e9 necess\u00e1rio para manter os medidores magn\u00e9ticos operacionais.<\/li><\/ol><h2 class=\"wp-block-heading\" id=\"disadvantages-of-electromagnetic-flow-meters\"><strong>Problems of Magnetic Flow Meters<\/strong><\/h2><ul class=\"wp-block-list\"><li><strong>Limited to Conductive Fluids: <\/strong>Uma das principais limita\u00e7\u00f5es dos medidores de fluxo electromagn\u00e9ticos \u00e9 a sua incapacidade de medir o fluxo de fluidos n\u00e3o condutores, como \u00f3leos, hidrocarbonetos e gases. O fluido deve ter uma condutividade m\u00ednima (normalmente acima de 5 \u00b5S\/cm) para que o medidor funcione corretamente.<\/li>\n\n<li><strong>Sensitive to Air Bubbles and Conductive Solids: <\/strong>Embora os contadores magn\u00e9ticos lidem bem com lamas, a presen\u00e7a de bolhas de ar ou de s\u00f3lidos condutores pode conduzir a ru\u00eddo de sinal e afetar a precis\u00e3o da medi\u00e7\u00e3o. Por conseguinte, \u00e9 necess\u00e1rio ter cuidado para garantir que o caudal se mant\u00e9m livre de grandes bolsas de ar.<\/li><\/ul><h2 class=\"wp-block-heading\" id=\"common-types-of-electromagnetic-flow-meters\"><strong>Comum<\/strong>&nbsp;<strong>Tipos de medidores de caudal electromagn\u00e9ticos<\/strong><\/h2><div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" width=\"750\" height=\"750\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter.jpg\" alt=\"Medidor de caudal eletromagn\u00e9tico em linha\" class=\"wp-image-22332 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-300x300.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-150x150.jpg 150w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-340x340.jpg 340w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-120x120.jpg 120w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-48x48.jpg 48w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-600x600.jpg 600w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-100x100.jpg 100w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-46x46.jpg 46w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/In-Line-Electromagnetic-Flow-Meter-700x700.jpg 700w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><div class=\"wp-block-media-text__content\"><p><strong>1. Medidores de caudal electromagn\u00e9ticos em linha: <\/strong>Estes s\u00e3o instalados diretamente na tubagem e oferecem a maior precis\u00e3o e fiabilidade. Existem em v\u00e1rios tamanhos para corresponder a diferentes di\u00e2metros de tubagem e s\u00e3o normalmente utilizados em ind\u00fastrias que requerem medi\u00e7\u00f5es de caudal precisas, tais como esta\u00e7\u00f5es de tratamento de \u00e1gua e instala\u00e7\u00f5es de processamento de produtos qu\u00edmicos.<\/p><\/div><\/div><div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\"><p><strong>2. Medidores de caudal electromagn\u00e9ticos de inser\u00e7\u00e3o:<\/strong>&nbsp;Ideal para tubagens maiores onde os medidores em linha seriam proibitivamente caros. Os medidores de inser\u00e7\u00e3o t\u00eam uma sonda que \u00e9 inserida no tubo e mede a velocidade do fluxo num ponto espec\u00edfico. Embora ofere\u00e7am uma precis\u00e3o ligeiramente inferior \u00e0 dos medidores em linha, s\u00e3o mais econ\u00f3micos para tubagens de grande di\u00e2metro e podem ser instalados sem encerrar o processo.<\/p><\/div><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"547\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Insertion-Electromagnetic-Flow-Meters.jpg\" alt=\"Medidores de caudal electromagn\u00e9ticos de inser\u00e7\u00e3o\" class=\"wp-image-22333 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Insertion-Electromagnetic-Flow-Meters.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Insertion-Electromagnetic-Flow-Meters-300x219.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Insertion-Electromagnetic-Flow-Meters-340x248.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><\/div><div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"457\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Battery-Powered-Electromagnetic-Flow-Meters.jpg\" alt=\"Medidores de caudal electromagn\u00e9ticos alimentados por bateria\" class=\"wp-image-22334 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Battery-Powered-Electromagnetic-Flow-Meters.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Battery-Powered-Electromagnetic-Flow-Meters-300x183.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Battery-Powered-Electromagnetic-Flow-Meters-340x207.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><div class=\"wp-block-media-text__content\"><p><strong>3. Medidores de caudal electromagn\u00e9ticos alimentados por bateria: <\/strong>Concebidos para aplica\u00e7\u00f5es em que a disponibilidade de energia \u00e9 uma preocupa\u00e7\u00e3o, como sistemas remotos de distribui\u00e7\u00e3o de \u00e1gua e irriga\u00e7\u00e3o. Estes contadores magn\u00e9ticos oferecem portabilidade e facilidade de instala\u00e7\u00e3o, mas podem ter limita\u00e7\u00f5es no registo de dados e no funcionamento cont\u00ednuo.<\/p><\/div><\/div><div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\"><p><strong>4. Medidores de caudal electromagn\u00e9ticos sanit\u00e1rios: <\/strong>Estes medidores foram concebidos para cumprir os rigorosos requisitos de higiene das ind\u00fastrias alimentar, de bebidas e farmac\u00eautica. Apresentam superf\u00edcies lisas, encaixes de liberta\u00e7\u00e3o r\u00e1pida e materiais que podem suportar limpezas frequentes, garantindo a conformidade com as normas da ind\u00fastria como 3A ou EHEDG.<\/p><\/div><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"623\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Sanitary-Electromagnetic-Flow-Meter.jpg\" alt=\"Medidor de caudal eletromagn\u00e9tico sanit\u00e1rio\" class=\"wp-image-22335 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Sanitary-Electromagnetic-Flow-Meter.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Sanitary-Electromagnetic-Flow-Meter-300x249.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Sanitary-Electromagnetic-Flow-Meter-340x282.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\" id=\"h\">How to Choose the Right Magnetic Flow Meter<\/h2><h3 class=\"wp-block-heading\" id=\"understand-the-characteristics-of-the-measured-medium\">Compreender as carater\u00edsticas do meio medido<\/h3><p>The operating principle of an electromagnetic flowmeter relies on the conductivity of the medium. The properties of the medium directly affect the flowmeter\u2019s performance, accuracy, and material selection for linings and electrodes.&nbsp;The primary factors to consider are:<\/p><ol class=\"wp-block-list\"><li><strong>Conductivity Requirements. <\/strong>Os medidores de caudal electromagn\u00e9ticos requerem que o meio tenha um determinado n\u00edvel de condutividade. Normalmente, os medidores de caudal electromagn\u00e9ticos s\u00e3o concebidos para medir fluidos com uma gama de condutividade de&nbsp;<strong>10-\u2074 S\/cm<\/strong>&nbsp;para&nbsp;<strong>5\u00d710-\u2076 S\/cm<\/strong>.<\/li>\n\n<li><strong>&nbsp;Medium Composition and Gas Bubbles. <\/strong>If the medium contains magnetic particles, such as iron filings, it may interfere with the flowmeter\u2019s magnetic field, leading to measurement errors. In such cases, flowmeters with magnetic shielding capabilities are recommended. The presence of bubbles in the fluid can cause measurement errors, as bubbles will contribute to the total flow. To mitigate this, a bubble separation device or a flowmeter capable of compensating for bubbles can improve accuracy.<\/li>\n\n<li><strong>Sediment and Scaling. <\/strong>Certain media, such as water with high calcium or magnesium content, may cause sediment or scale to accumulate on the pipe lining or electrodes, affecting measurement accuracy. Self-cleaning electrodes or flowmeters with anti-scaling features are recommended.&nbsp;<\/li>\n\n<li><strong>Hygiene and Food-Grade Requirements. <\/strong>Em ind\u00fastrias como a alimentar, a farmac\u00eautica e a qu\u00edmica, os medidores de caudal t\u00eam de cumprir normas de higiene espec\u00edficas. Os materiais utilizados no medidor de caudal devem estar em conformidade com as normas de qualidade alimentar ou GMP, como o a\u00e7o inoxid\u00e1vel, PTFE ou PFA, garantindo que o medidor de caudal n\u00e3o reage com o meio e \u00e9 f\u00e1cil de limpar.<\/li>\n\n<li><strong>Corrosion Resistance. <\/strong>For corrosive media, such as acidic, alkaline liquids or <a href=\"https:\/\/metlaninst.com\/pt\/a-complete-guide-to-select-chemical-flow-meters\/\" data-type=\"post\" data-id=\"27572\">chemical flow meter solutions<\/a>, the corrosion resistance of the flowmeter lining and electrodes is critical. Materials like PTFE, PFA, or ceramic linings are recommended to ensure long-term durability, while electrodes made of corrosion-resistant materials like tantalum or platinum will help maintain measurement accuracy and stability.<\/li><\/ol><h3 class=\"wp-block-heading\" id=\"operating-condition-parameters\">Par\u00e2metros das condi\u00e7\u00f5es de funcionamento<\/h3><ol class=\"wp-block-list\"><li><strong>Temperature and Pressure. <\/strong>Temperature and pressure directly influence the performance and lifespan of electromagnetic flowmeters. For high-temperature fluids, flowmeters should be selected with linings that can withstand high temperatures, such as PTFE or PFA. For high-pressure environments, flowmeters made of pressure-resistant materials are required to ensure safety and prevent leakage. In high-pressure systems, flanges, bolts, and other connection components must have sufficient pressure ratings and be securely installed to avoid joint leaks.<\/li>\n\n<li><strong>Pipe Diameter and Flow Range Matching.<\/strong> O di\u00e2metro do medidor de caudal eletromagn\u00e9tico deve corresponder ao di\u00e2metro do tubo para garantir um funcionamento adequado dentro da sua gama de caudal efetivo. Um medidor de caudal com um di\u00e2metro demasiado grande ou demasiado pequeno pode afetar a precis\u00e3o da medi\u00e7\u00e3o. Para aplica\u00e7\u00f5es de baixo caudal ou baixa velocidade, recomenda-se normalmente a sele\u00e7\u00e3o de um medidor de caudal com um di\u00e2metro ligeiramente mais pequeno para melhorar a sensibilidade e a precis\u00e3o.<\/li>\n\n<li><strong>Flow Velocity and Full-Scale Flow.<\/strong> The measurement accuracy of an electromagnetic flowmeter remains stable within a specific flow velocity range, typically 1 to 10 m\/s for liquids. In practice, flow velocities above 5 m\/s may cause wear on the flowmeter lining, especially if softer materials like rubber are used. For low-flow (below 1 m\/s) applications, reducing the flowmeter\u2019s diameter can help increase flow velocity and improve signal strength and accuracy.<\/li><\/ol><h3 class=\"wp-block-heading\" id=\"choosing-the-right-accuracy-level\">Escolher o n\u00edvel de precis\u00e3o correto<\/h3><p>Electromagnetic flow meters generally offer an accuracy range of \u00b10.5% to \u00b11% of the measured value for standard models. High-precision models can achieve \u00b10.2% or better, depending on the manufacturer and application conditions. Accuracy may also vary with factors such as flow profile, pipe condition, and fluid conductivity.<\/p><h2 class=\"wp-block-heading\" id=\"applications-of-electromagnetic-flow-meters\"><strong>Aplica\u00e7\u00f5es dos medidores de caudal electromagn\u00e9ticos<\/strong><\/h2><p>Os medidores de caudal electromagn\u00e9ticos s\u00e3o amplamente utilizados em ind\u00fastrias onde a medi\u00e7\u00e3o do caudal de l\u00edquidos condutores \u00e9 crucial para o controlo de processos, fatura\u00e7\u00e3o ou monitoriza\u00e7\u00e3o ambiental. Algumas aplica\u00e7\u00f5es not\u00e1veis incluem:<\/p><div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"398\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Magnetic-Flow-Meters-used-water-and-Wastewater-Treatment.jpg\" alt=\"Medidores de caudal magn\u00e9ticos utilizados no tratamento de \u00e1gua e de \u00e1guas residuais\" class=\"wp-image-22336 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Magnetic-Flow-Meters-used-water-and-Wastewater-Treatment.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Magnetic-Flow-Meters-used-water-and-Wastewater-Treatment-300x159.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Magnetic-Flow-Meters-used-water-and-Wastewater-Treatment-340x180.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><div class=\"wp-block-media-text__content\"><p><strong>Tratamento de \u00e1gua e de \u00e1guas residuais:<\/strong>&nbsp;Nos sistemas de \u00e1gua municipais e industriais, os contadores magn\u00e9ticos s\u00e3o utilizados para medir \u00e1gua bruta, \u00e1gua tratada, lamas e produtos qu\u00edmicos. A sua resist\u00eancia \u00e0 abras\u00e3o dos s\u00f3lidos torna-os ideais para aplica\u00e7\u00f5es de \u00e1guas residuais.<\/p><\/div><\/div><p><strong>- Sistemas agr\u00edcolas e de irriga\u00e7\u00e3o: <\/strong>Os contadores magn\u00e9ticos alimentados por bateria s\u00e3o utilizados em locais agr\u00edcolas remotos para medir o consumo de \u00e1gua para uma gest\u00e3o eficiente da irriga\u00e7\u00e3o.<\/p><div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\"><p><strong>Ind\u00fastrias qu\u00edmicas e petroqu\u00edmicas: <\/strong>Os medidores Mag medem produtos qu\u00edmicos agressivos, \u00e1cidos, bases e l\u00edquidos corrosivos. O seu m\u00e9todo de medi\u00e7\u00e3o n\u00e3o intrusivo assegura a compatibilidade com subst\u00e2ncias corrosivas e viscosas.<\/p><\/div><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"498\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Eletromagnetic-Meters-in-Chemical-and-Petrochemical-Industries.webp\" alt=\"Medidores Eletromagn\u00e9ticos em Ind\u00fastrias Qu\u00edmicas e Petroqu\u00edmicas\" class=\"wp-image-22337 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Eletromagnetic-Meters-in-Chemical-and-Petrochemical-Industries.webp 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Eletromagnetic-Meters-in-Chemical-and-Petrochemical-Industries-300x199.webp 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Eletromagnetic-Meters-in-Chemical-and-Petrochemical-Industries-340x226.webp 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><\/div><div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"439\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Pharmaceutical-Industry-with-Magnetic-Flow-Meters.jpg\" alt=\"Ind\u00fastria farmac\u00eautica com medidores de caudal magn\u00e9ticos\" class=\"wp-image-22338 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Pharmaceutical-Industry-with-Magnetic-Flow-Meters.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Pharmaceutical-Industry-with-Magnetic-Flow-Meters-300x176.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Pharmaceutical-Industry-with-Magnetic-Flow-Meters-340x199.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><div class=\"wp-block-media-text__content\"><p><strong>Ind\u00fastria farmac\u00eautica: <\/strong>A medi\u00e7\u00e3o exacta e est\u00e9ril do caudal \u00e9 fundamental no fabrico de produtos farmac\u00eauticos, onde os medidores magn\u00e9ticos fornecem fiabilidade e precis\u00e3o para o manuseamento de l\u00edquidos e processos de adi\u00e7\u00e3o de qu\u00edmicos.<\/p><\/div><\/div><p><strong>- Ind\u00fastria mineira e ind\u00fastria da pasta e do papel: <\/strong>Na ind\u00fastria mineira, os medidores magn\u00e9ticos medem os fluxos de lamas com part\u00edculas em suspens\u00e3o, enquanto que na ind\u00fastria da pasta e do papel, monitorizam o fluxo de pasta, produtos qu\u00edmicos e \u00e1guas residuais.<\/p><div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\"><p><strong>Ind\u00fastria de alimentos e bebidas: <\/strong>Os medidores de caudal electromagn\u00e9ticos s\u00e3o utilizados na produ\u00e7\u00e3o de bebidas, produtos l\u00e1cteos e outros consum\u00edveis. Os medidores garantem uma dosagem precisa e um controlo de qualidade, respeitando as normas de higiene com modelos de grau sanit\u00e1rio.<\/p><\/div><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"429\" src=\"http:\/\/www.metlaninst.com\/wp-content\/uploads\/2024\/09\/Mag-Meters-applied-in-Food-and-Beverage-Industry.jpg\" alt=\"Medidores Magn\u00e9ticos aplicados na Ind\u00fastria Alimentar e de Bebidas\" class=\"wp-image-22339 size-full\" srcset=\"https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Mag-Meters-applied-in-Food-and-Beverage-Industry.jpg 750w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Mag-Meters-applied-in-Food-and-Beverage-Industry-300x172.jpg 300w, https:\/\/metlaninst.com\/wp-content\/uploads\/2024\/09\/Mag-Meters-applied-in-Food-and-Beverage-Industry-340x194.jpg 340w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure><\/div><p>Os medidores de caudal electromagn\u00e9ticos s\u00e3o ferramentas inestim\u00e1veis em ambientes industriais modernos, onde a medi\u00e7\u00e3o precisa de l\u00edquidos condutores \u00e9 fundamental. As suas vantagens \u00fanicas, como a elevada precis\u00e3o, a aus\u00eancia de pe\u00e7as m\u00f3veis e a vasta gama de aplica\u00e7\u00f5es, fazem deles a escolha preferida de muitas ind\u00fastrias. No entanto, as suas limita\u00e7\u00f5es, como a incapacidade de medir fluidos n\u00e3o condutores e custos iniciais mais elevados, devem ser consideradas ao selecionar a tecnologia de medi\u00e7\u00e3o de caudal adequada. Ao compreender os princ\u00edpios de funcionamento, as vantagens, as desvantagens, as aplica\u00e7\u00f5es e os tipos de medidores de caudal electromagn\u00e9ticos, as ind\u00fastrias podem tomar decis\u00f5es informadas que melhoram a efici\u00eancia e a fiabilidade dos processos.<\/p>","protected":false},"excerpt":{"rendered":"<p>A medi\u00e7\u00e3o de caudal \u00e9 um aspeto crucial de v\u00e1rios processos industriais, assegurando um controlo e gest\u00e3o precisos dos l\u00edquidos. Entre os diferentes tipos de medidores de caudal dispon\u00edveis, os medidores de caudal electromagn\u00e9ticos, ou medidores magn\u00e9ticos, destacam-se pela sua precis\u00e3o, fiabilidade e aplicabilidade em diversos contextos. Desde a sua inven\u00e7\u00e3o nos anos 50, os medidores de caudal electromagn\u00e9ticos tornaram-se uma refer\u00eancia na ind\u00fastria [...]<\/p>","protected":false},"author":1,"featured_media":22340,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[123,124],"tags":[137,125,126,138],"class_list":["post-22330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-flow-meters","category-magnetic-flow-meters","tag-eletromagnetic-flow-meter","tag-flow-meters","tag-magnetic-flow-meters","tag-working-principles-of-mag-meters"],"_links":{"self":[{"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/posts\/22330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/comments?post=22330"}],"version-history":[{"count":7,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/posts\/22330\/revisions"}],"predecessor-version":[{"id":27590,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/posts\/22330\/revisions\/27590"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/media\/22340"}],"wp:attachment":[{"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/media?parent=22330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/categories?post=22330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/metlaninst.com\/pt\/wp-json\/wp\/v2\/tags?post=22330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}