{"id":6615,"date":"2026-05-06T10:08:14","date_gmt":"2026-05-06T10:08:14","guid":{"rendered":"https:\/\/ultrasuonindt.it\/products\/probes-and-accessories\/transducers-for-corrosion-thickness-gauges-dual-element\/"},"modified":"2026-10-04T05:36:24","modified_gmt":"2026-10-04T05:36:24","slug":"transducers-for-corrosion-thickness-gauges-dual-element","status":"publish","type":"page","link":"https:\/\/ultrasuonindt.it\/en\/products\/probes-and-accessories\/transducers-for-corrosion-thickness-gauges-dual-element\/","title":{"rendered":"Transducers for Corrosion Thickness Gauges (Dual Element)"},"content":{"rendered":"\n<div class=\"wp-block-group is-layout-constrained wp-container-core-group-is-layout-61d584a3 wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-ba02fbf7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:42%\">\n<figure class=\"wp-block-image size-full has-custom-border coblocks-animate\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"387\" height=\"387\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-banner_dual_element_mtg_1-web-387x387-1.webp?resize=387%2C387&#038;ssl=1\" alt=\"Dakota dual element transducers for corrosion thickness gauges\" class=\"wp-image-1150\" style=\"border-width:1px;border-top-left-radius:20px;border-top-right-radius:20px;border-bottom-left-radius:20px;border-bottom-right-radius:20px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-banner_dual_element_mtg_1-web-387x387-1.webp?w=387&amp;ssl=1 387w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-banner_dual_element_mtg_1-web-387x387-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-banner_dual_element_mtg_1-web-387x387-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 387px) 100vw, 387px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:58%\">\n<p class=\"has-text-color has-background wp-block-paragraph\" style=\"border-radius:0px 6px 6px 0px;border-left-color:#2980B9;border-left-style:solid;border-left-width:5px;color:#1A5276;background-color:#EBF5FB;padding-top:14px;padding-right:16px;padding-bottom:14px;padding-left:16px;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.612), 20px);font-style:italic\">Dakota dual element transducers are designed to measure remaining thickness ultrasonically on corroded materials and irregular surfaces, where separating the two crystals eliminates ring-down.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list is-style-checkbox\">\n<li><strong>Frequencies:<\/strong> 1, 2.25, 5, 7.5, 10 MHz<\/li>\n\n\n\n<li><strong>Diameters:<\/strong> 3\/16\u2033, 1\/4\u2033 and 1\/2\u2033<\/li>\n\n\n\n<li><strong>Damping:<\/strong> standard, high or ThruPaint<\/li>\n\n\n\n<li><strong>Connector potting:<\/strong> top, side, angled<\/li>\n\n\n\n<li><strong>Temperature:<\/strong> ambient up to 343 \u00b0C (high-temperature transducers)<\/li>\n\n\n\n<li><strong>Configurations:<\/strong> standard, high resolution, microspot<\/li>\n\n\n\n<li><strong>Compatibility:<\/strong> every Dakota corrosion thickness gauge<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The Dakota dual element family covers the whole range of needs typical of non-destructive testing on industrial, marine, offshore, oil and gas plant and on metal infrastructure. Having two separate piezoelectric crystals makes it possible to measure accurately even on corroded or irregular surfaces, where other types of probe reach their operating limit. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">RODER SRL supplies the full range of genuine Dakota dual element transducers, with immediate availability from our warehouses in Italy, the United Kingdom and the United States. For every remaining-thickness measurement application on corroded material, our technical team helps you choose the model best suited to the material, the thickness range and the geometry of the surface to be inspected. We guarantee pre- and post-sales support.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Every Dakota dual element transducer is compatible with the Dakota thickness gauges of the CX, ZX, CMX and MX series, with the CMX10-DL and with the R9 and RX8-DL motorsport sonic testers. Typical applications include the inspection of piping, tanks, pipelines, ship hulls, pressure vessels and mechanical components subject to corrosion. <\/p>\n<\/div>\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<h2 class=\"wp-block-heading\">What dual element transducers are<\/h2>\n\n<p class=\"wp-block-paragraph\"><strong>Dual element<\/strong> transducers (also called &#8220;twin crystal&#8221;) are the category of ultrasonic probe designed specifically to <strong>measure remaining thickness on materials affected by corrosion<\/strong>. They differ from conventional probes in having inside them <strong>two piezoelectric crystals separated by an acoustic barrier<\/strong>: one crystal transmits the ultrasonic signal, the other receives the echo returning from the material. <\/p>\n\n<p class=\"wp-block-paragraph\">This physical arrangement eliminates <strong>ring-down<\/strong> \u2014 the tail of noise produced by the transmitting crystal immediately after the emission pulse \u2014 and makes it possible to measure accurately even <strong>very small thicknesses<\/strong> and <strong>irregular, corroded or painted surfaces<\/strong>. For this reason dual element transducers are the de facto standard for corrosion inspection on piping, tanks, pipelines, ship hulls and pressure vessels. <\/p>\n\n<p class=\"wp-block-paragraph\">The crystals are also mounted at <strong>a slight angle<\/strong> towards each other, optimising the focusing of the ultrasonic beam in the zone of interest and improving the response near the contact surface. This design feature also makes dual element probes ideal for measuring thin materials, or for inspecting components where the surface echo might otherwise mask the back-wall signal. <\/p>\n\n<h2 class=\"wp-block-heading\">The Dakota range: frequencies, diameters and configurations<\/h2>\n\n<p class=\"wp-block-paragraph\">Dakota NDT produces a <strong>complete range<\/strong> of dual element transducers covering every need typical of predictive maintenance, quality inspection in production and periodic checks to sector standards. The family comprises over <strong>90 models<\/strong>, distinguished by the combination of frequency, diameter, damping and connector configuration. <\/p>\n\n<h3 class=\"wp-block-heading\">Frequencies available<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>1 MHz<\/strong> \u2014 for <strong>highly attenuating materials<\/strong> (grey cast iron, ductile iron, attenuating alloy steels) and for <strong>large thicknesses<\/strong> (over 200 mm)<\/li>\n\n\n\n<li><strong>2.25 MHz<\/strong> \u2014 a versatile low frequency, excellent on cast irons and attenuating alloys at medium thicknesses<\/li>\n\n\n\n<li><strong>5 MHz<\/strong> \u2014 the <strong>universal frequency<\/strong>, the standard choice for carbon steels and common stainless steels. It accounts for about 70% of the models in the catalogue <\/li>\n\n\n\n<li><strong>7.5 MHz<\/strong> \u2014 <strong>high resolution<\/strong>, for thin thicknesses or for detecting small pitting<\/li>\n\n\n\n<li><strong>10 MHz<\/strong> \u2014 the highest resolution available in dual element, for precision measurements on thin, homogeneous materials<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Contact surface diameters<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>3\/16\u2033<\/strong> (4.76 mm) \u2014 compact probes for <strong>restricted access<\/strong><\/li>\n\n\n\n<li><strong>1\/4\u2033<\/strong> (6.35 mm) \u2014 for measurements on <strong>small diameter tubes<\/strong> and curved components<\/li>\n\n\n\n<li><strong>1\/2\u2033<\/strong> (12.7 mm) \u2014 the <strong>reference configuration<\/strong> for most corrosion applications<\/li>\n\n\n\n<li><strong>1\u2033<\/strong> (25.4 mm) \u2014 for <strong>large thicknesses<\/strong> and strongly attenuating materials<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Types of damping<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>Standard damping<\/strong> \u2014 the basic configuration for corrosion measurements on most surfaces<\/li>\n\n\n\n<li><strong>Highly damped<\/strong> \u2014 high damping, used in the <strong>ThruPaint<\/strong> versions to <strong>measure through layers of paint, coating or light insulation<\/strong> without having to remove the covering<\/li>\n\n\n\n<li><strong>Exxon Spec \/ High Resolution<\/strong> \u2014 special configurations with damping optimised for applications to an industrial specification (refinery tanks, oil and gas pipelines)<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Connector configurations (potting)<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>Potted Top<\/strong> \u2014 connector on top, ideal for vertical measurements on walls<\/li>\n\n\n\n<li><strong>Potted Side<\/strong> \u2014 side connector, convenient for restricted horizontal access, under covers, in trenches<\/li>\n\n\n\n<li><strong>Angled<\/strong> \u2014 connector at a preset angle, for inspections on curved surfaces or internal corners<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Representative models from the catalogue<\/h2>\n\n<p class=\"wp-block-paragraph\">Below is a selection of <strong>representative models<\/strong> covering most industrial applications. For the complete catalogue of the <strong>91 Dakota dual element codes<\/strong> available for prompt delivery, contact our technical office. <\/p>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2000-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-002-2000\" class=\"wp-image-1144 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2000-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2000-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2000-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-002-2000<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/4\u2033 \u2014 standard damping, top potting. A compact probe for small thicknesses. <\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2700-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-002-2700\" class=\"wp-image-1149 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2700-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2700-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_2700-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-002-2700<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/4\u2033 \u2014 high damping ThruPaint, ideal for measuring through coatings.<\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_3300-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-002-3300\" class=\"wp-image-1142 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_3300-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_3300-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_002_3300-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-002-3300<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">7.50 MHz \u00d8 1\/4\u2033 \u2014 high resolution, standard damping, for thin thicknesses.<\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_004_2000-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-004-2000\" class=\"wp-image-1553 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_004_2000-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_004_2000-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_004_2000-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-004-2000<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/2\u2033 \u2014 standard damping, top potting. The reference configuration for general measurements. <\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_104_2000-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-104-2000\" class=\"wp-image-1520 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_104_2000-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_104_2000-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_104_2000-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-104-2000<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/2\u2033 \u2014 side potting, convenient for restricted access in a horizontal position.<\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_202_2001-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-202-2001\" class=\"wp-image-1504 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_202_2001-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_202_2001-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_202_2001-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-202-2001<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/4\u2033 \u2014 standard damping, top Microdot connector.<\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_302_2001-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-302-2001\" class=\"wp-image-1490 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_302_2001-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_302_2001-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_302_2001-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-302-2001<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/4\u2033 \u2014 standard damping, side Microdot connector.<\/p>\n<\/div><\/div>\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_904_2009-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota dual element transducer T-904-2009\" class=\"wp-image-1475 size-full\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_904_2009-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_904_2009-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_corrosione-dual_element-t_904_2009-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h4 class=\"wp-block-heading\">T-904-2009<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">5.00 MHz \u00d8 1\/2\u2033 \u2014 armoured version, standard damping, side Lemo connector.<\/p>\n<\/div><\/div>\n\n<h2 class=\"wp-block-heading\">Compatible Dakota thickness gauges<\/h2>\n\n<p class=\"wp-block-paragraph\">Dual element transducers are designed to be used with every <strong>Dakota thickness gauge in the corrosion line<\/strong>:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>CX series<\/strong> \u2014 entry and mid-level gauges (<a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cx2-basic-thickness-gauge\/\">CX2<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cx4-thickness-gauge-with-thrupaint\/\">CX4<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cx6-dl-thickness-gauge-with-data-logger\/\">CX6-DL<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cx8-dl-thickness-gauge-with-data-logger-and-b-scan\/\">CX8-DL<\/a>)<\/li>\n\n\n\n<li><strong>ZX series<\/strong> \u2014 basic gauges with data logger (<a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-zx-series-entry-level-corrosion-thickness-gauges-zx-1-zx-3\/\">ZX-Series<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-zx6-dl-multi-echo-thickness-gauge-with-data-logger\/\">ZX6-DL<\/a>)<\/li>\n\n\n\n<li><strong>CMX series<\/strong> \u2014 professional gauges (<a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cmx-series-corrosion-thickness-gauges-with-a-scan\/\">CMX-Series<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-cmx10-dl-top-of-the-range-corrosion-gauge\/\">CMX10-DL<\/a>)<\/li>\n\n\n\n<li><strong>MX series<\/strong> \u2014 rugged gauges for corrosion inspection (<a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-mx1-dl-advanced-a-scan-and-b-scan-gauge\/\">MX1-DL<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/thickness-gauges\/dakota-mx2-dl-a-scan-b-scan-corrosion-gauge\/\">MX2-DL<\/a>)<\/li>\n\n\n\n<li><strong>Sonic Testers<\/strong> for motorsport (<a href=\"https:\/\/ultrasuonindt.it\/en\/products\/special-instruments\/dakota-r9-sonic-tester-for-motorsport-and-racing\/\">R9<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/special-instruments\/dakota-rx8-dl-advanced-sonic-tester-with-engine-mapping\/\">RX8-DL<\/a>) for cylinder wall measurement<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/flaw-detectors\/dakota-fx70-dl-portable-ultrasonic-flaw-detector\/\">FX70-DL\/FX71-DL<\/a> and <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/flaw-detectors\/dakota-fx81-dl-benchtop-flaw-detector\/\">FX81-DL<\/a> flaw detectors, in thickness mode, also accept dual element probes for corrosion measurements integrated into the flaw detection process.<\/p>\n\n<h2 class=\"wp-block-heading\">How to choose the right dual element transducer<\/h2>\n\n<p class=\"wp-block-paragraph\">Selecting the correct dual element transducer depends on <strong>five main factors<\/strong>: the type of material to be inspected, the expected thickness range, the presence of coatings or paint, the temperature of the surface and the geometry of the component. A wrong choice can lead to unstable readings, an inability to detect the back-wall, or damage to the probe. <\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Carbon steels and standard stainless steels<\/strong>: 5 MHz, 1\/2\u2033 diameter, standard damping<\/li>\n\n\n\n<li><strong>Grey cast iron or attenuating materials<\/strong>: 1 or 2.25 MHz, diameters of 1\/2\u2033 or larger<\/li>\n\n\n\n<li><strong>Small diameter tubes<\/strong>: 5 MHz, 1\/4\u2033 diameter for better surface contact<\/li>\n\n\n\n<li><strong>Measuring through paint or coating<\/strong>: the <strong>ThruPaint<\/strong> version with high damping<\/li>\n\n\n\n<li><strong>Heavily corroded surfaces<\/strong>: 5 MHz high resolution, or 7.5 MHz on thin thicknesses<\/li>\n\n\n\n<li><strong>High temperature (up to 343 \u00b0C)<\/strong>: <strong>T-042-2700<\/strong> series with dedicated couplant<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">For a general treatment, see our technical guide <a href=\"https:\/\/ultrasuonindt.it\/en\/how-to-choose-the-right-ultrasonic-transducer-for-every-application\/\">How to choose the right ultrasonic transducer for each application<\/a>.<\/p>\n\n<h2 class=\"wp-block-heading\">Typical applications<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Predictive maintenance<\/strong> of piping, tanks and pressure lines in refineries and petrochemical plants<\/li>\n\n\n\n<li><strong>Pipeline inspection<\/strong> in oil and gas, searching for internal pitting and general loss of thickness<\/li>\n\n\n\n<li><strong>Periodic inspection<\/strong> of ship hulls, offshore installations and marine infrastructure<\/li>\n\n\n\n<li><strong>Corrosion checks<\/strong> on pressure vessels to the ASME, EN and API standards<\/li>\n\n\n\n<li><strong>Thickness mapping<\/strong> on metal structures, bridges and penstocks<\/li>\n\n\n\n<li><strong>Quality control in production<\/strong> of tubes, sheet and mechanical components<\/li>\n\n\n\n<li><strong>High temperature measurements<\/strong> on plant in service, with no shutdown<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Complementary accessories<\/h2>\n\n<p class=\"wp-block-paragraph\">For a complete measuring system, besides the transducer we recommend considering the <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/probes-and-accessories\/\">complementary accessories<\/a> of the Dakota ultrasonic family: standard and high-temperature <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/probes-and-accessories\/ultrasonic-couplants\/\">couplants<\/a>, <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/probes-and-accessories\/calibration-blocks-for-ultrasonic-thickness-gauges\/\">calibration blocks<\/a> in 4340 steel with a certificate, and replacement <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/probes-and-accessories\/cables-for-ultrasonic-transducers\/\">probe cables<\/a> with LEMO 00 or MicroDot connectors.<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<p class=\"wp-block-paragraph\"><strong>Request availability and a quotation:<\/strong> <a href=\"https:\/\/ultrasuonindt.it\/en\/contact\/\">Contact us<\/a> stating the model of your Dakota thickness gauge and the intended application. We offer immediate delivery times from our warehouses. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dakota dual element transducers for corrosion thickness gauges: a complete range of twin crystal probes for ultrasonic measurements on corroded and irregular materials and at high temperature. Frequencies 1-10 MHz, diameters from 3\/16&#8221; to 1&#8221;. <\/p>\n","protected":false},"author":157040980,"featured_media":2743,"parent":3008,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"dual element transducers","_yoast_wpseo_title":"Dakota Dual Element Corrosion Transducers | ULTRASUONI NDT","_yoast_wpseo_metadesc":"Dakota dual element probes for corrosion thickness gauges: 1-10 MHz range, diameters from 3\/16 to 1 inch, high temperature. Stock in Italy.","_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,"footnotes":""},"class_list":["post-6615","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dakota Dual Element Corrosion Transducers | ULTRASUONI NDT<\/title>\n<meta name=\"description\" content=\"Dakota dual element probes for corrosion thickness gauges: 1-10 MHz range, diameters from 3\/16 to 1 inch, high temperature. 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Product catalogue Contact Professional-grade non-destructive testing RODER SRL is the official distributor of Dakota NDT, the leading American manufacturer of ultrasonic instrumentation for non-destructive testing. 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