{"id":12804,"date":"2025-03-06T05:39:16","date_gmt":"2025-03-06T05:39:16","guid":{"rendered":"https:\/\/hsmagnet.com\/?p=12340"},"modified":"2025-09-17T07:58:50","modified_gmt":"2025-09-17T07:58:50","slug":"cual-es-mas-preciso-para-el-gaussimetro-de-magnetismo-de-alnico-o-la-curva-de-desmagnetizacion","status":"publish","type":"post","link":"https:\/\/hsmagnet.com\/es\/2025\/03\/06\/which-one-is-more-accurate-for-alnico-magnetism-gaussmeter-or-demagnetization-curve\/","title":{"rendered":"Gauss\u00edmetro vs. curva de desmagnetizaci\u00f3n: \u00bfcu\u00e1l es mejor para medir imanes de AlNiCo?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/hsmagnet.com\/magnetic-materials\/alnico-magnets\/\" data-type=\"link\" data-id=\"https:\/\/hsmagnet.com\/magnetic-materials\/alnico-magnets\/\">AlNiCo magnets<\/a> are known for their excellent temperature stability, high residual induction, and long service life. Whether you are manufacturing motors, sensors, or measuring instruments, understanding their magnetic performance is key.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When it comes to testing AlNiCo magnets, two common tools are:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Gaussmeter (Tesla meter)<\/strong> \u2013 Measures surface magnetic field strength.<\/li>\n\n\n\n<li><strong>Demagnetization curve (B-H curve) testing<\/strong> \u2013 Measures the complete magnetic property data of a material.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">While both methods are useful, they serve different purposes.<\/p>\n\n\n<div class=\"root-eb-toc-7psh5 wp-block-essential-blocks-table-of-contents\"><div class=\"eb-parent-wrapper eb-parent-eb-toc-7psh5 \"><div class=\"eb-toc-container eb-toc-7psh5  eb-toc-is-not-sticky eb-toc-not-collapsible eb-toc-initially-not-collapsed eb-toc-scrollToTop style-1 list-style-none\" data-scroll-top=\"false\" data-scroll-top-icon=\"fas fa-angle-up\" data-collapsible=\"false\" data-sticky-hide-mobile=\"false\" data-sticky=\"false\" data-scroll-target=\"scroll_to_toc\" data-copy-link=\"false\" data-editor-type=\"\" data-hide-desktop=\"false\" data-hide-tab=\"false\" data-hide-mobile=\"false\" data-itemcollapsed=\"false\" data-highlight-scroll=\"false\"><div class=\"eb-toc-header\"><h2 class=\"eb-toc-title\">Table of Contents<\/h2><\/div><div class=\"eb-toc-wrapper \" data-headers=\"[{&quot;level&quot;:2,&quot;content&quot;:&quot;1. What a Gaussmeter Does&quot;,&quot;text&quot;:&quot;1. What a Gaussmeter Does&quot;,&quot;link&quot;:&quot;1-what-a-gaussmeter-does&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;2. What a Demagnetization Curve Does&quot;,&quot;text&quot;:&quot;2. What a Demagnetization Curve Does&quot;,&quot;link&quot;:&quot;2-what-a-demagnetization-curve-does&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;3. Which Should You Use?&quot;,&quot;text&quot;:&quot;3. Which Should You Use?&quot;,&quot;link&quot;:&quot;3-which-should-you-use&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Conclusion&quot;,&quot;text&quot;:&quot;Conclusion&quot;,&quot;link&quot;:&quot;conclusion&quot;}]\" data-visible=\"[true,true,true,true,true,true]\" data-delete-headers=\"[{&quot;label&quot;:&quot;1. What a Gaussmeter Does&quot;,&quot;value&quot;:&quot;1-what-a-gaussmeter-does&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;2. What a Demagnetization Curve Does&quot;,&quot;value&quot;:&quot;2-what-a-demagnetization-curve-does&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;3. Which Should You Use?&quot;,&quot;value&quot;:&quot;3-which-should-you-use&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Conclusion&quot;,&quot;value&quot;:&quot;conclusion&quot;,&quot;isDelete&quot;:false}]\" data-smooth=\"true\" data-top-offset=\"\"><div class=\"eb-toc__list-wrap\"><ul class=\"eb-toc__list\"><li><a href=\"#1-what-a-gaussmeter-does\">1. What a Gaussmeter Does<\/a><li><a href=\"#2-what-a-demagnetization-curve-does\">2. What a Demagnetization Curve Does<\/a><li><a href=\"#3-which-should-you-use\">3. Which Should You Use?<\/a><li><a href=\"#conclusion\">Conclusion<\/a><\/ul><\/div><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">1. What a Gaussmeter Does<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A Gaussmeter measures <strong>surface flux density<\/strong> at a specific point, usually in units of Gauss (G) or Tesla (T). It is quick and easy to use, making it ideal for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Incoming quality checks<\/strong> \u2013 Ensuring magnets are magnetized correctly.<\/li>\n\n\n\n<li><strong>Field service<\/strong> \u2013 Checking whether a magnet has weakened over time.<\/li>\n\n\n\n<li><strong>Sorting<\/strong> \u2013 Separating stronger and weaker magnets in production.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Limitations for AlNiCo:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Not a full picture<\/strong> \u2013 A single surface field reading doesn\u2019t tell you coercivity, remanence, or the full energy product.<\/li>\n\n\n\n<li><strong>Shape and size effect<\/strong> \u2013 Irregular shapes cause uneven fields, leading to variation in readings.<\/li>\n\n\n\n<li><strong>Measurement direction<\/strong> \u2013 AlNiCo\u2019s anisotropy means the reading changes if the probe is not aligned with the magnetization axis.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"586\" src=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/Gaussmeter-measuring-surface-flux-density-on-AlNiCo-magnet.webp\" alt=\"Gaussmeter measuring surface flux density on AlNiCo magnet\" class=\"wp-image-13843\" srcset=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/Gaussmeter-measuring-surface-flux-density-on-AlNiCo-magnet.webp 900w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/Gaussmeter-measuring-surface-flux-density-on-AlNiCo-magnet-300x195.webp 300w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/Gaussmeter-measuring-surface-flux-density-on-AlNiCo-magnet-768x500.webp 768w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/Gaussmeter-measuring-surface-flux-density-on-AlNiCo-magnet-600x391.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2. What a Demagnetization Curve Does<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A demagnetization curve (B-H curve) test applies a controlled reverse magnetic field to the magnet and measures how it loses and regains magnetization.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It provides <strong>full magnetic characteristics<\/strong>, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Br (remanence)<\/strong> \u2013 Magnet\u2019s residual flux after full magnetization.<\/li>\n\n\n\n<li><strong>Hc (coercivity)<\/strong> \u2013 Resistance to demagnetization.<\/li>\n\n\n\n<li><strong>(BH)max<\/strong> \u2013 Maximum energy product.<\/li>\n\n\n\n<li>Full <strong>hysteresis loop<\/strong> \u2013 Showing magnetization, demagnetization, and re-magnetization behavior.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Advantages for AlNiCo:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Complete data<\/strong> \u2013 Useful for research, design, and quality control.<\/li>\n\n\n\n<li><strong>Independent of magnet shape<\/strong> \u2013 Unlike a Gaussmeter, it\u2019s not affected by surface geometry as much.<\/li>\n\n\n\n<li><strong>Identifying material grade<\/strong> \u2013 The curve can confirm if a magnet meets the specification of <a href=\"https:\/\/hsmagnet.com\/product\/alnico-5-block-magnet-6517-515mm\/\">AlNiCo 5<\/a>, <a href=\"https:\/\/hsmagnet.com\/product\/alnico-type-8-alnico-8-motor-magnets-d12x14xd5mm\/\">AlNiCo 8<\/a>, etc.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/B-H-demagnetization-curve-for-AlNiCo-magnet-showing-remanence-and-coercivity-1024x683.webp\" alt=\"B-H demagnetization curve for AlNiCo magnet showing remanence and coercivity\" class=\"wp-image-13844\" srcset=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/B-H-demagnetization-curve-for-AlNiCo-magnet-showing-remanence-and-coercivity-1024x683.webp 1024w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/B-H-demagnetization-curve-for-AlNiCo-magnet-showing-remanence-and-coercivity-300x200.webp 300w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/B-H-demagnetization-curve-for-AlNiCo-magnet-showing-remanence-and-coercivity-768x512.webp 768w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/B-H-demagnetization-curve-for-AlNiCo-magnet-showing-remanence-and-coercivity-600x400.webp 600w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/03\/B-H-demagnetization-curve-for-AlNiCo-magnet-showing-remanence-and-coercivity.webp 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">3. Which Should You Use?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>For quick checks or field measurements:<\/strong> Use a <strong>Gaussmeter<\/strong>.<\/li>\n\n\n\n<li><strong>For full performance evaluation, grade verification, or R&amp;D:<\/strong> Use a <strong>demagnetization curve test<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gaussmeters are fast and convenient, but their readings can be influenced by shape, alignment, and surface effects \u2014 especially with anisotropic materials like AlNiCo. A demagnetization curve test, while slower and requiring specialized equipment, provides a complete and reliable assessment of the magnet\u2019s properties, making it essential for critical design work or quality control.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In short:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Gaussmeter<\/strong> = Quick surface strength check.<\/li>\n\n\n\n<li><strong>Demagnetization curve<\/strong> = Complete magnetic profile.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>AlNiCo magnets are known for their excellent temperature stability, high residual induction, and long service life. Whether you are manufacturing motors, sensors, or measuring instruments, understanding their magnetic performance is key. When it comes to testing AlNiCo magnets, two common tools are: While both methods are useful, they serve different purposes. 1. What a Gaussmeter [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13842,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[25],"tags":[],"class_list":["post-12804","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alnico-magnet"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gaussmeter or demagnetization curve for AlNiCo magnetism<\/title>\n<meta name=\"description\" content=\"Demagnetization curve is more accurate for AlNiCo magnetism than the Gaussmeter Devices for fast measurements.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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