{"id":5026,"date":"2026-09-07T14:39:11","date_gmt":"2026-09-07T14:39:11","guid":{"rendered":"https:\/\/ultrasuonindt.it\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/"},"modified":"2026-09-17T16:59:36","modified_gmt":"2026-09-17T16:59:36","slug":"dac-and-dgs-curves","status":"publish","type":"page","link":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/","title":{"rendered":"DAC and DGS curves"},"content":{"rendered":"\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:36%\">\n<figure class=\"wp-block-image size-large has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?resize=1200%2C1200&#038;ssl=1\" alt=\"Flaw detector with indication evaluation toolkit\" class=\"wp-image-1034\" style=\"border-color:#000000;border-width:1px;border-radius:15px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?resize=768%2C768&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:4%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-group has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-top-right-radius:6px;border-bottom-right-radius:6px;border-left-color:#225f78;border-left-width:6px;background-color:#ebf1f4;padding-top:24px;padding-right:28px;padding-bottom:24px;padding-left:28px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.408), 18px);font-style:italic;font-weight:400;line-height:1.6\">A high echo does not mean a large flaw. Two identical reflectors at different depths produce different amplitudes: without a term of comparison, the height of the peak says nothing. <\/p>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\" style=\"list-style:none;padding-left:0px;line-height:1.6\">\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> DAC: curve built on known reflectors at different depths<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> DGS: evaluation based on theoretical distance, gain and size curves<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> Direct comparison between actual indication and reference<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> Sizing toolkit with DAC, DGS, TCG and AWS on the FX family<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">The amplitude of the echo returning from a discontinuity depends on several factors at once: the size of the reflector, its orientation with respect to the beam, and the distance the pulse has had to travel. The farther the flaw, the more the signal is attenuated, regardless of its severity. <\/p>\n\n<p class=\"wp-block-paragraph\">The DAC curve solves the problem experimentally. Identical artificial reflectors are machined into a reference block of the same material, at increasing depths; their echoes are measured and the points obtained are joined. The resulting curve describes how, in that material, the echo of a reflector of known size is attenuated as distance increases.  <\/p>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-cover is-light popmake-4066 popmake-739\" style=\"border-width:1px;min-height:250px;aspect-ratio:unset;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"250\" class=\"wp-block-cover__image-background wp-image-727 size-full\" alt=\"\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=1200%2C250&#038;ssl=1\" data-object-fit=\"cover\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=300%2C63&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=1024%2C213&amp;ssl=1 1024w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=768%2C160&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-30 has-background-dim\" style=\"background-color:#d3d6dc\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-15701bb7 wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-right has-ti-fg-color is-style-default has-luminous-vivid-amber-color has-text-color has-link-color wp-elements-1 wp-block-paragraph\" style=\"font-size:clamp(21.536px, 1.346rem + ((1vw - 3.2px) * 1.374), 35px);\"><strong>Need help choosing the right product?<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-b507c051 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button popmake-4066 popmake-739\"><a class=\"wp-block-button__link has-ti-accent-color has-cyan-bluish-gray-background-color has-text-color has-background has-link-color wp-element-button\">Contact us<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\">From that moment the operator has a yardstick. An indication found in the part is compared with the curve at the same depth: one assesses by how much it exceeds or falls below it, and the applicable code establishes how to classify it. The DGS method follows a similar logic but relies on theoretical curves linking distance, gain and equivalent reflector size.  <\/p>\n\n<h2 class=\"wp-block-heading\">What is needed to build a DAC<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Element<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Why it is necessary<\/th><\/tr><\/thead><tbody><tr><td>Reference block<\/td><td>It must be of the same material as the part to be inspected<\/td><\/tr><tr><td>Known artificial reflectors<\/td><td>They provide echoes of comparable size at various depths<\/td><\/tr><tr><td>Same probe and same wedge<\/td><td>The curve is valid for the configuration with which it was built<\/td><\/tr><tr><td>Reference gain<\/td><td>The curve is valid at the gain with which it was plotted<\/td><\/tr><tr><td>Applicable code<\/td><td>It sets the criteria by which the indication is to be classified<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">When the configuration changes<\/h2>\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:36%\">\n<figure class=\"wp-block-image size-large has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"700\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-blocchetti_di_calibrazione-web-700x700-1.webp?resize=700%2C700&#038;ssl=1\" alt=\"Reference blocks for building evaluation curves\" class=\"wp-image-1583\" style=\"border-color:#000000;border-width:1px;border-radius:15px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-blocchetti_di_calibrazione-web-700x700-1.webp?w=700&amp;ssl=1 700w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-blocchetti_di_calibrazione-web-700x700-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-blocchetti_di_calibrazione-web-700x700-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:4%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p class=\"wp-block-paragraph\">A DAC curve is not transferable. It is valid for the combination of material, probe, wedge and gain with which it was built: if one of these elements changes, the curve must be redone, because the way the signal is attenuated along the path changes. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why the reference block is part of the kit of anyone performing weld inspections, just like the probe. On high-end Dakota NDT instruments the manufacturer indicates the possibility of building 16-point DAC curves. <\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Instruments with sizing toolkit<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Instrument<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Evaluation functions<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/flaw-detectors\/dakota-fx70-dl-portable-ultrasonic-flaw-detector\/\">Dakota FX70-DL<\/a><\/td><td>Sizing toolkit with DAC, AWS, TCG and DGS<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/flaw-detectors\/dakota-fx81-dl-benchtop-flaw-detector\/\">Dakota FX81-DL<\/a><\/td><td>Same toolkit in benchtop version<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cmx10-dl-top-of-the-range-corrosion-gauge\/\">Dakota CMX10-DL<\/a><\/td><td>Diagnostic functions with 16-point DAC<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/probes-and-accessories\/calibration-blocks-for-ultrasonic-thickness-gauges\/\">Calibration blocks<\/a><\/td><td>References for building the curve<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1757292001\"><strong class=\"schema-faq-question\">Why doesn&#8217;t a higher echo mean a larger flaw?<\/strong><p class=\"schema-faq-answer\">Because the amplitude also depends on the depth at which the reflector lies and on its orientation with respect to the beam. Two identical flaws at different depths produce echoes of different amplitude. <\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757292002\"><strong class=\"schema-faq-question\">Is a DAC curve valid for all jobs?<\/strong><p class=\"schema-faq-answer\">No. It is valid for the combination of material, probe, wedge and gain with which it was built. If one of these elements changes, the curve must be redone.  <\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757292003\"><strong class=\"schema-faq-question\">What is the difference between DAC and DGS?<\/strong><p class=\"schema-faq-answer\">The DAC is built experimentally by measuring real reflectors on a reference block. The DGS instead relies on curves linking distance, gain and equivalent reflector size. <\/p><\/div><\/div>\n\n<p class=\"wp-block-paragraph\">Back to <a href=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/\">Flaw detection<\/a> or write to us from the <a href=\"https:\/\/ultrasuonindt.it\/en\/contact\/\">Contacts<\/a> page.<\/p>\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">Further information and contacts <\/h5>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><a href=\"http:\/\/www.roder.it\">Systems division and sensor integration partner : www.roder.it<\/a><br\/><a href=\"https:\/\/ultrasuonindt.it\/chi-siamo\/\">More information about RODER SRL : about us<\/a><br\/>Contact for general information : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/>Contact for information about these products : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><br\/>The information contained on this web page is provided for information purposes only. Although it has been compiled with the utmost care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation or typographical errors. For precise and up-to-date information, please contact our company directly.    <\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Some images on this website have been intentionally generated using Artificial Intelligence (AI). This is because, for many applications and projects, it is not possible to disclose photographs of the installation or of the actual system due to confidentiality agreements, confidentiality clauses and non-disclosure agreements (NDAs). <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A high echo does not mean a large flaw. Two identical reflectors at different depths produce different amplitudes: without a term of comparison, the height of the peak says nothing. The amplitude of the echo returning from a discontinuity depends on several factors at once: the size of the reflector, its orientation with respect to [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":2758,"parent":4485,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"DAC and DGS curves ultrasound","_yoast_wpseo_title":"DAC and DGS curves | Dakota NDT","_yoast_wpseo_metadesc":"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"footnotes":""},"class_list":["post-5026","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DAC and DGS curves | Dakota NDT<\/title>\n<meta name=\"description\" content=\"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DAC and DGS curves | Dakota NDT\" \/>\n<meta property=\"og:description\" content=\"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/\" \/>\n<meta property=\"og:site_name\" content=\"ULTRASUONI NDT\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-17T16:59:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/\",\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/\",\"name\":\"DAC and DGS curves | Dakota NDT\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1\",\"datePublished\":\"2026-09-07T14:39:11+00:00\",\"dateModified\":\"2026-09-17T16:59:36+00:00\",\"description\":\"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292001\"},{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292002\"},{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292003\"}],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#primaryimage\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1\",\"width\":1200,\"height\":1200,\"caption\":\"Dakota NDT FX70 Flaw Detector Powerful for ultrasonic flaw and crack measurement\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"NDT Technologies and Standards\",\"item\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Flaw detection\",\"item\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"DAC and DGS curves\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/\",\"name\":\"ULTRASUONI NDT\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#organization\",\"name\":\"RODER SRL\",\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1\",\"width\":1000,\"height\":330,\"caption\":\"RODER SRL\"},\"image\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/roder-srl\"]},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292001\",\"position\":1,\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292001\",\"name\":\"Why doesn't a higher echo mean a larger flaw?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Because the amplitude also depends on the depth at which the reflector lies and on its orientation with respect to the beam. Two identical flaws at different depths produce echoes of different amplitude. \",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292002\",\"position\":2,\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292002\",\"name\":\"Is a DAC curve valid for all jobs?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. It is valid for the combination of material, probe, wedge and gain with which it was built. If one of these elements changes, the curve must be redone.  \",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292003\",\"position\":3,\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/flaw-detection\\\/dac-and-dgs-curves\\\/#faq-question-1757292003\",\"name\":\"What is the difference between DAC and DGS?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The DAC is built experimentally by measuring real reflectors on a reference block. The DGS instead relies on curves linking distance, gain and equivalent reflector size. \",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"DAC and DGS curves | Dakota NDT","description":"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/","og_locale":"en_US","og_type":"article","og_title":"DAC and DGS curves | Dakota NDT","og_description":"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.","og_url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/","og_site_name":"ULTRASUONI NDT","article_modified_time":"2026-09-17T16:59:36+00:00","og_image":[{"width":1200,"height":1200,"url":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1","type":"image\/webp"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["WebPage","FAQPage"],"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/","url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/","name":"DAC and DGS curves | Dakota NDT","isPartOf":{"@id":"https:\/\/ultrasuonindt.it\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#primaryimage"},"image":{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#primaryimage"},"thumbnailUrl":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1","datePublished":"2026-09-07T14:39:11+00:00","dateModified":"2026-09-17T16:59:36+00:00","description":"How the amplitude of an ultrasonic indication is evaluated: DAC curves built on reference reflectors and the DGS method, with sizing toolkit.","breadcrumb":{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292001"},{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292002"},{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292003"}],"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#primaryimage","url":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1","contentUrl":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1","width":1200,"height":1200,"caption":"Dakota NDT FX70 Flaw Detector Powerful for ultrasonic flaw and crack measurement"},{"@type":"BreadcrumbList","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/ultrasuonindt.it\/en\/"},{"@type":"ListItem","position":2,"name":"NDT Technologies and Standards","item":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/"},{"@type":"ListItem","position":3,"name":"Flaw detection","item":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/"},{"@type":"ListItem","position":4,"name":"DAC and DGS curves"}]},{"@type":"WebSite","@id":"https:\/\/ultrasuonindt.it\/en\/#website","url":"https:\/\/ultrasuonindt.it\/en\/","name":"ULTRASUONI NDT","description":"","publisher":{"@id":"https:\/\/ultrasuonindt.it\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ultrasuonindt.it\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/ultrasuonindt.it\/en\/#organization","name":"RODER SRL","url":"https:\/\/ultrasuonindt.it\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ultrasuonindt.it\/en\/#\/schema\/logo\/image\/","url":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1","contentUrl":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1","width":1000,"height":330,"caption":"RODER SRL"},"image":{"@id":"https:\/\/ultrasuonindt.it\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/roder-srl"]},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292001","position":1,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292001","name":"Why doesn't a higher echo mean a larger flaw?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Because the amplitude also depends on the depth at which the reflector lies and on its orientation with respect to the beam. Two identical flaws at different depths produce echoes of different amplitude. ","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292002","position":2,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292002","name":"Is a DAC curve valid for all jobs?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No. It is valid for the combination of material, probe, wedge and gain with which it was built. If one of these elements changes, the curve must be redone.  ","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292003","position":3,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/dac-and-dgs-curves\/#faq-question-1757292003","name":"What is the difference between DAC and DGS?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The DAC is built experimentally by measuring real reflectors on a reference block. The DGS instead relies on curves linking distance, gain and equivalent reflector size. ","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/PeHTL3-1j4","jetpack-related-posts":[{"id":4485,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/","url_meta":{"origin":5026,"position":0},"title":"Flaw detection","author":"GSM","date":"7 September 2026","format":false,"excerpt":"In thickness measurement only one echo counts, the back-wall echo. In flaw detection all the others count: those returning from something that should not be inside the material. \u2713 A-Scan to interpret the echo, B-Scan to see its profile \u2713 DAC and DGS curves to evaluate the amplitude against a\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX70 Flaw Detector Powerful for ultrasonic flaw and crack measurement","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":5036,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/flaw-detection\/tcg-and-depth-compensation\/","url_meta":{"origin":5026,"position":1},"title":"TCG and depth compensation","author":"GSM","date":"7 September 2026","format":false,"excerpt":"Instead of correcting the reading of a distant echo after the fact, TCG amplifies more what comes from far away. Identical reflectors at different depths thus appear at the same height. \u2713 Gain that increases with time of flight, i.e. with depth \u2713 Echoes from identical reflectors brought to the\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX71-DL Flaw Detector ultrasonic flaw detector","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-FX71-DL_rilevatore_di_difetti_ad_ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":2094,"url":"https:\/\/ultrasuonindt.it\/tecnologie-e-normative-ndt\/rilevamento-difetti\/curve-dac-e-dgs\/","url_meta":{"origin":5026,"position":2},"title":"Curve DAC e DGS","author":"GSM","date":"7 September 2026","format":false,"excerpt":"Un'eco alta non significa difetto grande. Due riflettori identici a profondit\u00e0 diverse producono ampiezze diverse: senza un termine di confronto, l'altezza del picco non dice nulla. \u2713\u00a0DAC: curva costruita su riflettori noti a profondit\u00e0 diverse \u2713\u00a0DGS: valutazione basata su curve teoriche di distanza, guadagno e dimensione \u2713\u00a0Confronto diretto fra indicazione\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX70 Flaw Detector Powerful per misure di difetti e cricche ad ultrasuoni","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":5034,"url":"https:\/\/ultrasuonindt.it\/es\/tecnologias-y-normas-end\/deteccion-de-defectos\/curvas-dac-y-dgs\/","url_meta":{"origin":5026,"position":3},"title":"Curvas DAC y DGS","author":"GSM","date":"7 September 2026","format":false,"excerpt":"Un eco alto no significa un defecto grande. Dos reflectores id\u00e9nticos a profundidades distintas producen amplitudes distintas: sin un t\u00e9rmino de comparaci\u00f3n, la altura del pico no dice nada. \u2713 DAC: curva construida sobre reflectores conocidos a distintas profundidades \u2713 DGS: evaluaci\u00f3n basada en curvas te\u00f3ricas de distancia, ganancia y\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX70 Flaw Detector Powerful para la medici\u00f3n de defectos y grietas por ultrasonidos","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":5029,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/detection-de-defauts\/courbes-dac-et-dgs\/","url_meta":{"origin":5026,"position":4},"title":"Courbes DAC et DGS","author":"GSM","date":"7 September 2026","format":false,"excerpt":"Un \u00e9cho \u00e9lev\u00e9 ne signifie pas un d\u00e9faut important. Deux r\u00e9flecteurs identiques \u00e0 des profondeurs diff\u00e9rentes produisent des amplitudes diff\u00e9rentes : sans terme de comparaison, la hauteur du pic ne dit rien. \u2713 DAC : courbe construite sur des r\u00e9flecteurs connus \u00e0 diff\u00e9rentes profondeurs \u2713 DGS : \u00e9valuation bas\u00e9e sur\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX70 Flaw Detector Powerful pour la mesure de d\u00e9fauts et de fissures par ultrasons","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":5032,"url":"https:\/\/ultrasuonindt.it\/de\/zfp-technologien-und-normen\/fehlerpruefung\/dac-und-dgs-kurven\/","url_meta":{"origin":5026,"position":5},"title":"DAC- und DGS-Kurven","author":"GSM","date":"7 September 2026","format":false,"excerpt":"Ein hohes Echo bedeutet keinen gro\u00dfen Fehler. Zwei identische Reflektoren in unterschiedlicher Tiefe erzeugen unterschiedliche Amplituden: Ohne Vergleichsma\u00dfstab sagt die H\u00f6he des Peaks nichts aus. \u2713 DAC: Kurve auf Basis bekannter Reflektoren in verschiedenen Tiefen \u2713 DGS: Bewertung anhand theoretischer Kurven von Abstand, Verst\u00e4rkung und Gr\u00f6\u00dfe \u2713 Direkter Vergleich zwischen\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT FX70 Flaw Detector Powerful zur Ultraschallmessung von Fehlern und Rissen","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_FX70-Flaw-Detector-Powerful_per_misure_di_difetti_e_cricche-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/5026","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/users\/157040980"}],"replies":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/comments?post=5026"}],"version-history":[{"count":4,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/5026\/revisions"}],"predecessor-version":[{"id":6163,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/5026\/revisions\/6163"}],"up":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/4485"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media\/2758"}],"wp:attachment":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media?parent=5026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}