{"id":2983,"date":"2026-04-16T19:09:03","date_gmt":"2026-04-16T19:09:03","guid":{"rendered":"https:\/\/ultrasuonindt.it\/products\/bolt-tension-monitors\/"},"modified":"2026-09-12T10:05:32","modified_gmt":"2026-09-12T10:05:32","slug":"bolt-tension-monitors","status":"publish","type":"page","link":"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/","title":{"rendered":"Bolt Tension Monitors"},"content":{"rendered":"\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color has-link-color wp-elements-1\">BT Series \u2014 Bolt Tension Monitors<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-17c5c485 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-137726dd wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#eeeeee;padding-top:18px;padding-right:20px;padding-bottom:18px;padding-left:20px\">\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-191125a4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:34%\">\n<figure class=\"wp-block-image size-full has-custom-border\"><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt1-dl-portable-bolt-tension-monitor\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota NDT BT1-DL MiniMax portable ultrasonic bolt tension monitor\" class=\"has-border-color wp-image-998\" style=\"border-color:#000000;border-width:1px;border-radius:10px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.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_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66%\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-18px;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase\">Portable for field use<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color\" style=\"color:#17303f;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.51), 19px);\"><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt1-dl-portable-bolt-tension-monitor\/\">Dakota BT1-DL MiniMax \u2014 Portable<\/a><\/h3>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.102), 15px);\">The portable model of the range, for field inspections and periodic monitoring of bolts on in-service plant.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Part Number <strong>Z-156-0008<\/strong> (designation MiniMax)<\/li>\n\n\n\n<li>Weight <strong>383 g<\/strong>, 3 AA batteries with up to 35 hours of operation, USB-C<\/li>\n\n\n\n<li>Square Wave pulser 100\/150\/200 V, one measurement gate<\/li>\n\n\n\n<li><strong>Glue-On<\/strong> mode for short bolts, with bonded transducer disc<\/li>\n\n\n\n<li>Ideal for field inspections and for the wind sector<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.102), 15px);font-weight:600\"><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt1-dl-portable-bolt-tension-monitor\/\">\u2192 Learn more<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-137726dd wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#eeeeee;padding-top:18px;padding-right:20px;padding-bottom:18px;padding-left:20px\">\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-191125a4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:34%\">\n<figure class=\"wp-block-image size-full has-custom-border\"><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt2-dl-benchtop-bolt-tension-monitor\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota NDT BT2-DL Max II top-of-the-range benchtop ultrasonic bolt tension monitor\" class=\"has-border-color wp-image-959\" style=\"border-color:#000000;border-width:1px;border-radius:10px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.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-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66%\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-18px;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase\">Top-of-the-range benchtop<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color\" style=\"color:#17303f;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.51), 19px);\"><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt2-dl-benchtop-bolt-tension-monitor\/\">Dakota BT2-DL Max II \u2014 Benchtop<\/a><\/h3>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.102), 15px);\">The top-of-the-range model, essential for long bolts, attenuating materials and certified assemblies.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Part Number <strong>Z-197-0001<\/strong> (designation Max II)<\/li>\n\n\n\n<li>Lithium-Ion battery supplied (18 hours) or 6 \u00d7 AA<\/li>\n\n\n\n<li>3 pulsers: Spike, Square Wave and <strong>Tone Burst<\/strong> at 5 frequencies 0.5-10 MHz<\/li>\n\n\n\n<li>Voltage up to <strong>400 V<\/strong>, 3 independent gates<\/li>\n\n\n\n<li>Fastener capacity <strong>up to 30 metres<\/strong> (100 feet)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.102), 15px);font-weight:600\"><a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt2-dl-benchtop-bolt-tension-monitor\/\">\u2192 Learn more<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-137726dd wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#eeeeee;padding-top:18px;padding-right:20px;padding-bottom:18px;padding-left:20px\">\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-191125a4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:34%\">\n<figure class=\"wp-block-image size-full has-custom-border\"><a href=\"https:\/\/ultrasuonindt.it\/prodotti\/monitor-tensione-bulloni\/dakota-multimax-monitoraggio-remoto-4-canali\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/09\/dakota_ndt-multimax-strumento_multimax_monitor_tensione_bulloni_4_canali_con_trasduttori-web_image-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Dakota MultiMax, 4-channel bolt tension monitor with transducers\" class=\"has-border-color wp-image-2363\" style=\"border-color:#000000;border-width:1px;border-radius:10px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/09\/dakota_ndt-multimax-strumento_multimax_monitor_tensione_bulloni_4_canali_con_trasduttori-web_image-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/09\/dakota_ndt-multimax-strumento_multimax_monitor_tensione_bulloni_4_canali_con_trasduttori-web_image-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/09\/dakota_ndt-multimax-strumento_multimax_monitor_tensione_bulloni_4_canali_con_trasduttori-web_image-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66%\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-18px;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase\">Fixed-installation remote monitoring<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color\" style=\"color:#17303f;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.51), 19px);\"><a href=\"https:\/\/ultrasuonindt.it\/prodotti\/monitor-tensione-bulloni\/dakota-multimax-monitoraggio-remoto-4-canali\/\">Dakota MultiMax \u2014 4-channel remote monitoring<\/a><\/h3>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.102), 15px);\">Fixed-installation monitor that measures elongation continuously and remotely on several bolts, with automatic temperature compensation.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>4 multiplexed channels<\/strong>, stackable modules to monitor several bolts<\/li>\n\n\n\n<li>Measuring range <strong>25.4 mm \u2013 15.2 m<\/strong>, resolution <strong>\u00b10.0001 mm<\/strong><\/li>\n\n\n\n<li><strong>Automatic temperature compensation<\/strong> in real time<\/li>\n\n\n\n<li><strong>Glue-On<\/strong> transducers, <strong>IP65<\/strong> aluminium housing, 383 g<\/li>\n\n\n\n<li>Compliant with <strong>ASTM E1685-20<\/strong>; PC-driven via MultiUI software<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.102), 15px);font-weight:600\"><a href=\"https:\/\/ultrasuonindt.it\/prodotti\/monitor-tensione-bulloni\/dakota-multimax-monitoraggio-remoto-4-canali\/\">\u2192 Learn more<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">The <strong>Dakota NDT ultrasonic bolt tension monitors<\/strong> are instruments dedicated to the <strong>measurement of controlled tightening<\/strong> of critical flanged and bolted connections. They use the ultrasonic principle to measure the <strong>bolt elongation<\/strong> directly with an accuracy of <strong>\u00b10.0001 mm<\/strong>, and from it calculate time of flight in nanoseconds, applied load, stress and percentage strain. Unlike traditional torque-wrench techniques \u2014 affected by friction, lubrication, temperature and thread surface conditions \u2014 ultrasonic measurement provides the <strong>actual tension value<\/strong> applied, reducing errors from the 30-40% typical of torque to fractions of a percent.  <\/p>\n\n<div class=\"wp-block-group has-ti-bg-alt-background-color has-background is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\">Instrument selection guide<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not familiar with the Dakota Bolt Tension Monitor range? Identify your use case and we will point you to the recommended model. For requirements outside these profiles, we remain at your disposal through the contact details on the <a href=\"https:\/\/ultrasuonindt.it\/en\/contact\/\">Contact<\/a> page.  <\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">Bolt tension checks in the field<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Predictive maintenance on industrial plant, tightening checks on site, periodic inspections on existing structures. Portable battery-powered instrument. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended model:<\/strong> <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt1-dl-portable-bolt-tension-monitor\/\">Dakota BT1-DL MiniMax<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">Laboratory testing or in-production quality control<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Tension measurement and validation on large volumes, test benches, batch quality control. Benchtop instrument with high precision and extended data logger. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended model:<\/strong> <a href=\"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt2-dl-benchtop-bolt-tension-monitor\/\">Dakota BT2-DL Max II<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">Continuous monitoring of critical joints<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Bolts in hard-to-reach positions, plant subject to thermal cycling or vibration, joints whose integrity must be documented over time and not only at assembly. Fixed-installation instrument, PC-driven. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended model:<\/strong> <a href=\"https:\/\/ultrasuonindt.it\/prodotti\/monitor-tensione-bulloni\/dakota-multimax-monitoraggio-remoto-4-canali\/\">Dakota MultiMax<\/a><\/p>\n<\/div>\n<\/div>\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-2 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<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading\">BT1-DL, BT2-DL and MultiMax comparison<\/h2>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Feature<\/strong><\/td><td><strong>BT1-DL MiniMax<\/strong><\/td><td><strong>BT2-DL Max II<\/strong><\/td><td><strong>MultiMax<\/strong><\/td><\/tr><tr><td>Part Number<\/td><td>Z-156-0008<\/td><td>Z-197-0001<\/td><td>\u2014<\/td><\/tr><tr><td>Form factor<\/td><td>Portable<\/td><td>Benchtop<\/td><td>Fixed installation<\/td><\/tr><tr><td>Weight<\/td><td>383 g<\/td><td>2.04 kg<\/td><td>383 g<\/td><\/tr><tr><td>Elongation accuracy<\/td><td colspan=\"3\">\u00b10.0001 mm<\/td><\/tr><tr><td>Max fastener length<\/td><td>Standard<\/td><td>Up to 30 metres<\/td><td>Up to 15.2 metres<\/td><\/tr><tr><td>Measurement channels<\/td><td>1<\/td><td>1<\/td><td>4 multiplexed, stackable modules<\/td><\/tr><tr><td>Pulser types<\/td><td>1 (Square Wave)<\/td><td>3 (Spike, Square, <strong>Tone Burst<\/strong>)<\/td><td>1 (Square Wave)<\/td><\/tr><tr><td>Voltage<\/td><td>100\/150\/200 V<\/td><td>100-400 V<\/td><td>100\/150\/200 V<\/td><\/tr><tr><td>Gates<\/td><td>1<\/td><td>3 independent<\/td><td>1<\/td><\/tr><tr><td>Power supply<\/td><td>3 \u00d7 AA (35 h)<\/td><td>Li-Ion (18 h) \/ 6 \u00d7 AA (12 h)<\/td><td>Mains: USB to PC or AC adapter<\/td><\/tr><tr><td>USB<\/td><td>USB-C<\/td><td>USB-A\/B<\/td><td>USB-C<\/td><\/tr><tr><td>Control<\/td><td>On board<\/td><td>On board<\/td><td>PC only (MultiUI software)<\/td><\/tr><tr><td>Scenario ideale<\/td><td>Field, periodic monitoring<\/td><td>Certified assembly, long bolts<\/td><td>Continuous unattended monitoring<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">BT1-DL and BT2-DL are <strong>spot-measurement<\/strong> instruments: you take the instrument to the bolt and read the value. The <a href=\"https:\/\/ultrasuonindt.it\/prodotti\/monitor-tensione-bulloni\/dakota-multimax-monitoraggio-remoto-4-canali\/\">MultiMax<\/a> belongs to a different category \u2014 it is a <strong>4-channel remote monitoring system<\/strong> that stays installed on the plant, with permanently bonded transducers, and returns not a single measurement but the trend of preload over time, with automatic temperature compensation. <\/p>\n\n<h2 class=\"wp-block-heading\">How to choose between the models<\/h2>\n\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-8d43d7df wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Standard bolts<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Normal lengths and common steels: the <strong>BT1-DL<\/strong> MiniMax is fully adequate.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Long bolts or attenuating materials<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Aerospace superalloys, austenitic stainless steels, cast iron: <strong>BT2-DL<\/strong> Max II with Tone Burst and 400 V.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Long-term monitoring<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">To follow the same bolts over time: <strong>BT1-DL<\/strong> with Glue-On mode.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Assembly certification<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">When absolute traceability of tightening is required: <strong>BT2-DL<\/strong>.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Combined workflow<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Assembly in the workshop with the BT2-DL, field monitoring with the BT1-DL. Interoperable data. <\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Continuous unattended surveillance<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Several bolts to keep under control without going back to measure by hand: <strong>MultiMax<\/strong>, fixed installation.<\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">The ultrasonic method vs the torque wrench<\/h2>\n\n<p class=\"wp-block-paragraph\">When a bolt is tightened, the pull of the nut increases the applied force, causing an <strong>elastic elongation<\/strong> of the bolt itself. This deformation is <strong>directly proportional to the actual tension<\/strong> in the threaded assembly. The ultrasonic method measures the time of flight through the whole bolt: the greater the elongation, the greater the time of flight. Knowing the material properties, the instrument calculates all the relevant quantities.   <\/p>\n\n<p class=\"wp-block-paragraph\">The torque wrench, by contrast, measures the <strong>resistance to tightening<\/strong>, which depends on friction, lubrication, temperature and nut condition \u2014 factors that introduce errors of 30-40% on the actual tension. On critical bolts (aerospace, nuclear, wind, offshore) this margin is unacceptable. Further reading: <a href=\"\/misura-ultrasonica-vs-coppia-dinamometrica-bulloni\/\">Ultrasonic measurement vs torque wrench in bolt tightening<\/a>.  <\/p>\n\n<h2 class=\"wp-block-heading\">Typical applications<\/h2>\n\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-8d43d7df wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Wind turbines<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Tower base bolts, hub joints, blade connections: the sector&#8217;s benchmark.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Oil &amp; gas flanges<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Bolting of pressure connections to ASME PCC-1.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Nuclear sector<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Containment connections with absolute traceability.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Road and rail bridges<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Tightening of structural joints.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Aerospace<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Critical connections of aircraft and pressurised components.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Marine sector<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Offshore platforms and large marine engines.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Power generation<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Turbines, generators and boilers.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Large industrial machinery<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Presses, rolls and screw presses.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Scientific infrastructure<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Accelerators and large optics.<\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Common features of the portable models<\/h2>\n\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-8d43d7df wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">5 calculated quantities<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Elongation, time (ns), load, stress and %strain.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Auto Set<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Automates detection, scope and display settings for each bolt.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Field Calibration<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">With Vector or Regression correction curves.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Hi\/Low Alarm Limits<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">With LED and audible signal.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">64 user setups<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Plus the factory setups, editable.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Glue-On mode<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">For monitoring short bolts.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Bolt materials<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Preset list plus custom materials.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">100 MHz 8-bit TCXO digitizer<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Ultra-low-power architecture.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Broadband filter<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">1.8-19 MHz band.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">Adjustable damping<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">From 50 to 1500 \u03a9.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">NIST calibration<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">Traceable, as standard.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-radius:14px;background-color:#ebf1f4;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;margin-bottom:-14px;font-size:14px;font-weight:700\">PC Utility software<\/p>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#4a5b66;font-size:14px\">For managing measurement archives.<\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Standards and certifications<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>ASME PCC-1<\/strong> \u2014 Guidelines for Pressure Boundary Bolted Flange Joint Assembly<\/li>\n\n\n\n<li><strong>EN 1591-1<\/strong> \u2014 Flanges and their joints<\/li>\n\n\n\n<li><strong>ASTM E1685-20<\/strong> \u2014 ultrasonic measurement of bolt elongation (declared for the MultiMax)<\/li>\n\n\n\n<li><strong>NIST-traceable factory calibration<\/strong> and <strong>MIL-STD-45662A<\/strong><\/li>\n\n\n\n<li><strong>CE marking<\/strong> and EMC compliance<\/li>\n\n\n\n<li><strong>Calibration certificate<\/strong> supplied as standard<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Application guides from the blog:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/tensione-bulloni-turbine-eoliche-dakota\/\">Bolt tension in wind turbines: the ultrasonic method with Dakota<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/ultrasuonindt.it\/asme-pcc-1-norma-serraggio-flange-bulloni\/\">ASME PCC-1: the reference standard for controlled flange tightening<\/a><\/li>\n\n\n\n<li><a href=\"\/misura-ultrasonica-vs-coppia-dinamometrica-bulloni\/\">Ultrasonic measurement vs torque wrench<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/ultrasuonindt.it\/data-logger-vs-registrazione-manuale-misure-ndt\/\">Data logger vs manual recording<\/a><\/li>\n<\/ul>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Do you have critical tightening to manage?<\/strong>We will support you in the application analysis (bolt type\/length\/material, inspection frequency, required certification) to propose the right model with the optimal probe and accessories. <a href=\"https:\/\/ultrasuonindt.it\/en\/contact\/\">Contact us<\/a> for dedicated advice or for a demonstration on your critical bolts.<\/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>BT Series \u2014 Bolt Tension Monitors Portable for field use Dakota BT1-DL MiniMax \u2014 Portable The portable model of the range, for field inspections and periodic monitoring of bolts on in-service plant. \u2192 Learn more Top-of-the-range benchtop Dakota BT2-DL Max II \u2014 Benchtop The top-of-the-range model, essential for long bolts, attenuating materials and certified assemblies. [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":2755,"parent":2818,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"Bolt Tension Monitors","_yoast_wpseo_title":"Dakota NDT Ultrasonic Bolt Tension Monitors | RODER","_yoast_wpseo_metadesc":"Dakota NDT BT series bolt tension monitors: BT1-DL MiniMax portable and BT2-DL Max II benchtop for ultrasonic bolt tension measurement.","_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-2983","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dakota NDT Ultrasonic Bolt Tension Monitors 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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. We supply thickness gauges, flaw detectors and bolt tension monitors to\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT instrument family, ultrasonic thickness and corrosion inspection","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-famiglia-di-strumenti_di_misura_ad_ultrasuoni_per_controllo_di_spessore_e_corrosione-web-560x560-1.webp?fit=560%2C560&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-famiglia-di-strumenti_di_misura_ad_ultrasuoni_per_controllo_di_spessore_e_corrosione-web-560x560-1.webp?fit=560%2C560&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-famiglia-di-strumenti_di_misura_ad_ultrasuoni_per_controllo_di_spessore_e_corrosione-web-560x560-1.webp?fit=560%2C560&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":2818,"url":"https:\/\/ultrasuonindt.it\/en\/products\/","url_meta":{"origin":2983,"position":1},"title":"Products","author":"GSM","date":"16 April 2026","format":false,"excerpt":"RODER SRL is the official Dakota NDT distributor. The catalogue brings together the complete range of ultrasonic instrumentation for non-destructive testing (NDT): corrosion and precision thickness gauges, flaw detectors, bolt tension monitors, probes and accessories, special instruments for motorsport and data management software. Every instrument is supplied with a NIST-traceable\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT instrument family, ultrasonic thickness and corrosion inspection","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-famiglia-di-strumenti_di_misura_ad_ultrasuoni_per_controllo_di_spessore_e_corrosione-web-560x560-1.webp?fit=560%2C560&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-famiglia-di-strumenti_di_misura_ad_ultrasuoni_per_controllo_di_spessore_e_corrosione-web-560x560-1.webp?fit=560%2C560&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-famiglia-di-strumenti_di_misura_ad_ultrasuoni_per_controllo_di_spessore_e_corrosione-web-560x560-1.webp?fit=560%2C560&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":4508,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/ultrasonic-bolt-tension\/","url_meta":{"origin":2983,"position":2},"title":"Ultrasonic bolt tension","author":"GSM","date":"7 September 2026","format":false,"excerpt":"A tightened bolt is a spring under tension. By measuring how much it has stretched you know the load it is exerting: a quantity that a torque wrench can only estimate. \u2713 Measurement of the actual load, not of the applied torque \u2713 Automatic temperature compensation \u2713 Re-checking the same\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT BT Bolt Tension Monitor ultrasonic bolt elongation measurement application","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3625,"url":"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt1-dl-portable-bolt-tension-monitor\/","url_meta":{"origin":2983,"position":3},"title":"Dakota BT1-DL \u2013 Portable Bolt Tension Monitor","author":"GSM","date":"16 April 2026","format":false,"excerpt":"The Dakota BT1-DL MiniMax is the ultrasonic bolt tension monitor, portable, for elongation measurement and applied load. Built-in data logger and automatic calibration for tightening control. Portable : Tension measurement in the field Elongation measurement : Precise ultrasonic technique Built-in data logger : Tightening history memory Automatic calibration : On\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT BT1-DL MiniMax portable ultrasonic bolt tension monitor","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.webp?fit=680%2C680&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_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.webp?fit=680%2C680&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_bt1-dl_misura_tensione_elongazione_bulloni_e_tiranti-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":1560,"url":"https:\/\/ultrasuonindt.it\/prodotti\/sonde-e-accessori\/trasduttori-monitor-tensione-bulloni\/","url_meta":{"origin":2983,"position":4},"title":"Trasduttori per Monitor di Tensione Bulloni","author":"GSM","date":"6 May 2026","format":false,"excerpt":"I trasduttori Dakota per monitor di tensione bulloni: sonde dedicate per misura ultrasonica dell'allungamento elastico di fastener filettati. Compatibili con BT1-DL e BT2-DL Dakota.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Trasduttori Dakota NDT per monitor di tensione bulloni, misura ultrasonica allungamento elastico di fastener","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/05\/dakota_ndt-trasduttori_per_monitor_tensione_bulloni-web-387x387-1.webp?fit=387%2C387&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":4351,"url":"https:\/\/ultrasuonindt.it\/en\/products\/bolt-tension-monitors\/dakota-bt2-dl-benchtop-bolt-tension-monitor\/","url_meta":{"origin":2983,"position":5},"title":"Dakota BT2-DL \u2013 Benchtop Bolt Tension Monitor","author":"GSM","date":"16 April 2026","format":false,"excerpt":"The Dakota BT2-DL Max II is the ultrasonic bolt tension monitor in benchtop version with multi-channel capability. Simultaneous measurement of several bolts, extended datalogger and large display. Benchtop: For laboratory and production Multi-channel: Measures several bolts together Extended datalogger: Structured storage of tightening data Large display: High-contrast reading Automatic calibration:\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT BT2-DL Max II top-of-the-range benchtop ultrasonic bolt tension monitor","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.webp?fit=680%2C680&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-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-bt2-dl_misuratore_tensione_bulloni_versione_top_di_gamma-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/2983","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=2983"}],"version-history":[{"count":3,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/2983\/revisions"}],"predecessor-version":[{"id":4354,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/2983\/revisions\/4354"}],"up":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/2818"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media\/2755"}],"wp:attachment":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media?parent=2983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}