{"id":20781,"date":"2026-07-03T10:44:08","date_gmt":"2026-07-03T08:44:08","guid":{"rendered":"https:\/\/roder.it\/technologies\/strain-gauge-technology-and-load-cells\/torque-measurement\/"},"modified":"2026-09-24T14:13:18","modified_gmt":"2026-09-24T12:13:18","slug":"torque-measurement","status":"publish","type":"page","link":"https:\/\/roder.it\/en\/technologies\/strain-gauge-technology-and-load-cells\/torque-measurement\/","title":{"rendered":"Torque measurement"},"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:40%\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"757\" height=\"757\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1.webp\" alt=\"Digital torque meter with strain gauge torque transducer\" class=\"wp-image-15217\" 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:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1.webp 757w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1-300x300.webp 300w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1-150x150.webp?crop=1 150w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1-600x600.webp?crop=1 600w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1-400x400.webp?crop=1 400w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1-200x200.webp?crop=1 200w, https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/shimpo-torsiometri_per_tappi_serie_fg700ta-immagine_con_trasduttore_esterno_masterimage-web_image-757x757-1-120x120.webp?crop=1 120w\" sizes=\"auto, (max-width: 757px) 100vw, 757px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p class=\"has-text-color has-background wp-block-paragraph\" style=\"border-radius:0px 6px 6px 0px;border-left-color:var(--wp--preset--color--ti-accent);border-left-style:solid;border-left-width:5px;color:#1A5276;background-color:#ebf1f4;padding-top:14px;padding-right:16px;padding-bottom:14px;padding-left:16px;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.769), 20px);font-style:italic\"><strong>Torque measurement<\/strong> with <strong>strain gauge<\/strong> sensors converts the elastic deformation of a sensing element into a signal proportional to the applied torsional moment: it is the basis of digital torque meters for the inspection of tightening operations, closures and threaded couplings.<\/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 has-ti-accent-color has-text-color has-link-color wp-elements-1\">\n<li><strong>Strain gauge transducer:<\/strong> deformation to electrical signal<\/li>\n\n\n\n<li><strong>N\u00b7m units and submultiples:<\/strong> N\u00b7cm, kgf\u00b7cm, lb-in<\/li>\n\n\n\n<li><strong>Peak \/ First Peak modes:<\/strong> capture of the peak value<\/li>\n\n\n\n<li><strong>Accuracy down to \u00b10.3%:<\/strong> of reading or of full scale<\/li>\n\n\n\n<li><strong>Memory and software:<\/strong> data acquisition and analysis<\/li>\n\n\n\n<li><strong>Go\/no-go comparator:<\/strong> pass\/fail testing<\/li>\n\n\n\n<li><strong>Certified calibration:<\/strong> NIST traceability<\/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\"><strong>Torque<\/strong> (or torsional moment) is the product of a force and the arm at which it is applied, and is measured in newton meters (N\u00b7m) and its submultiples. Accurate measurement is essential wherever a tightening operation, a closure or a threaded coupling must meet a preset value: too low a torque does not guarantee the seal, too high a torque damages the component or prevents it from being opened. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In digital torque meters the torque is detected by a <strong>strain gauge transducer<\/strong>: the elastic deformation of the sensing element is converted into an electrical signal proportional to the applied torque. RODER offers this technology with the <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/\">Shimpo cap torque meters<\/a> (FG-7000TA, TNC, TNP). <\/p>\n<\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-cover is-light popmake-11245\" style=\"border-width:1px;border-top-left-radius:10px;border-top-right-radius:10px;border-bottom-left-radius:10px;border-bottom-right-radius:10px;min-height:250px;aspect-ratio:unset;\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"213\" class=\"wp-block-cover__image-background wp-image-14896 size-large\" alt=\"banner aiuto nella scelta dello strumento oppure della tecnologia\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-1024x213.png\" data-object-fit=\"cover\" srcset=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-1024x213.png 1024w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-300x63.png 300w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products-768x160.png 768w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/banner_technical_support_choose_products.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#d3d6dc\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-a304f9a9 wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-right has-ti-fg-color has-text-color has-link-color wp-elements-2 wp-block-paragraph\" style=\"font-size:clamp(21.536px, 1.346rem + ((1vw - 3.2px) * 1.726), 35px);\"><strong>Would you like 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\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/roder.it\/en\/contacts\/\">Click here !<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">What torque is and how it is measured<\/h2>\n\n<p class=\"wp-block-paragraph\"><strong>Torque<\/strong> quantifies the action that tends to rotate a body about an axis. In industrial quality control the quantities of interest are typically the <strong>closing torque<\/strong> (tightening) and the <strong>opening torque<\/strong> (release) of caps, rings and threaded components. The measurement is made by applying the torque to the instrument, or by placing it between the tool and the workpiece, and reading the value on a digital display, with the option of storing the measurement, comparing it with tolerance thresholds and transferring it to a PC.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">The strain gauge principle<\/h2>\n\n<p class=\"wp-block-paragraph\">The heart of the torque meter is a <strong>strain gauge torque transducer<\/strong>. Strain gauges applied to an elastic element detect its minute deformation when subjected to torsion: connected in a <strong>Wheatstone bridge<\/strong> configuration, they provide an electrical signal proportional to the applied torque, which the electronics convert, linearize and display. This principle guarantees high linearity, repeatability and long-term stability. On the <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-fg-7000ta\/\">FG-7000TA<\/a> the transducer is <strong>external<\/strong> and is recognized automatically when connected to the display base; on the <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-tnc\/\">TNC<\/a> and <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-tnp\/\">TNP<\/a> bench models the sensor is built into the test structure.   <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Measuring mode<\/h2>\n\n<p class=\"wp-block-paragraph\">To suit different types of test, torque meters offer several operating modes. <strong>Track<\/strong> mode shows the reading in real time; <strong>Peak<\/strong> stores the maximum value reached during the test; <strong>First Peak<\/strong> records the first peak after a programmed decrease (useful for catching the opening &#8220;click&#8221; of a cap); modes such as <strong>Auto Peak<\/strong>, <strong>Auto First Peak<\/strong> and <strong>Double Peak<\/strong> (available on the TNC) automate and repeat the measurement. <strong>Preset<\/strong> mode, with programmable high and low thresholds, enables <strong>go\/no-go<\/strong> pass\/fail testing.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Accuracy, units and calibration<\/h2>\n\n<p class=\"wp-block-paragraph\">The accuracy of Shimpo torque meters is high: <strong>\u00b10.3%<\/strong> (FG-7000TA and TNC) or <strong>\u00b10.5% F.S.<\/strong> (TNP), with resolutions down to a thousandth of a N\u00b7m depending on the capacity. The selectable units of measurement include <strong>N\u00b7m, N\u00b7cm, kgf\u00b7cm and lb-in<\/strong>, according to the range. To ensure metrological traceability, the instruments can be supplied with a <strong>calibration certificate<\/strong> (NIST traceable as well). Correct periodic calibration is essential to keep the measurement valid for quality control purposes.   <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">RODER torque meters<\/h2>\n\n<p class=\"wp-block-paragraph\">RODER distributes the <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/\">Shimpo cap torque meters<\/a>: the portable <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-fg-7000ta\/\">FG-7000TA<\/a> with external transducer and adjustable clamp (1\/5\/10 N\u00b7m), the bench-top <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-tnc\/\">TNC<\/a> up to 20 N\u00b7m with seven measuring modes and the bench-top <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-tnp\/\">TNP<\/a> (50 N\u00b7cm to 10 N\u00b7m) with HI-GO-LO LED comparator. For the practical application to closure inspection see <a href=\"https:\/\/roder.it\/applicazioni-e-soluzioni\/laboratorio-qualita-e-collaudo\/controllo-della-coppia-di-serraggio-dei-tappi\/\">Inspection of cap tightening torque<\/a>. <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">External or built-in transducer<\/h2>\n\n<p class=\"wp-block-paragraph\">There are two main architectures. In systems with an <strong>external transducer<\/strong>, such as the <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-fg-7000ta\/\">FG-7000TA<\/a>, the torque sensor is separate from the display base and is recognized automatically on connection: this makes it quick to change sensor in order to cover different capacities and to place the cell where it is needed. In <strong>bench-top<\/strong> systems such as <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-tnc\/\">TNC<\/a> and <a href=\"https:\/\/roder.it\/strumenti\/torsiometri-per-tappi\/torsiometri-per-tappi-serie-tnp\/\">TNP<\/a> the transducer is built into the test structure, with adjustable clamps that hold the specimen: a robust and repeatable solution, ideal for series testing in the laboratory or in production.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Measuring ranges, resolution and overload<\/h2>\n\n<p class=\"wp-block-paragraph\">The capacity of the instrument should be chosen according to the torque to be measured, working preferably in the upper part of the range in order to make the best use of the resolution. Shimpo torque meters cover from <strong>50 N\u00b7cm up to 20 N\u00b7m<\/strong> depending on the model, with resolutions down to a thousandth of a N\u00b7m on the lower capacities. <strong>Overload protection<\/strong> (120 to 150% of full scale) protects the transducer from accidental stress, while the high sampling rate (up to 2000 Hz) makes it possible to capture fast transients accurately, such as the release click of a cap.  <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Data acquisition and software<\/h2>\n\n<p class=\"wp-block-paragraph\">Shimpo digital torque meters have <strong>internal memory<\/strong> (up to 1000 readings) and <strong>USB<\/strong> outputs and, on the models that provide it, <strong>RS-232<\/strong>, as well as a comparator output for integration into a quality system. The free software makes it possible to download the measurements, display them, plot their trend on a chart and calculate the statistical values (mean, maximum, minimum) directly in a spreadsheet, making documentation and traceability of the tests easier. <\/p>\n\n<h2 class=\"wp-block-heading has-ti-accent-color has-text-color\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-0\"><strong class=\"schema-faq-question\">How is torque measured in a digital torque meter?<\/strong> <p class=\"schema-faq-answer\">Through a strain gauge transducer: strain gauges applied to an elastic element detect its deformation under torsion and, in a Wheatstone bridge configuration, provide a signal proportional to the torque, which the electronics display and store.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-1\"><strong class=\"schema-faq-question\">What is the difference between closing and opening torque?<\/strong> <p class=\"schema-faq-answer\">The closing torque is the torque needed to tighten the closure; the opening torque (or release torque) is the one needed to open it again. Both matter in guaranteeing the seal and the openability of the product. <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-2\"><strong class=\"schema-faq-question\">What do the Peak and First Peak modes mean?<\/strong> <p class=\"schema-faq-answer\">Peak stores the maximum value of the test; First Peak records the first peak after a programmed decrease, useful for catching the opening click of a cap.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-3\"><strong class=\"schema-faq-question\">What accuracy do Shimpo torque meters offer?<\/strong> <p class=\"schema-faq-answer\">\u00b10.3% (FG-7000TA and TNC) or \u00b10.5% F.S. (TNP), with selectable units N\u00b7m, N\u00b7cm, kgf\u00b7cm and lb-in and the option of a traceable calibration certificate.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-4\"><strong class=\"schema-faq-question\">Can torque meters be calibrated?<\/strong> <p class=\"schema-faq-answer\">Yes: they can be supplied with a calibration certificate, NIST traceable as well, and should be calibrated periodically to keep the measurement valid for quality control purposes.<\/p> <\/div><\/div>\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading has-ti-accent-color has-text-color has-link-color wp-elements-3\">Contacts &amp; Information<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Contact for general information : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/><br\/>Machine Vision Division of RODER : <a href=\"http:\/\/www.rodervision.com\">www.rodervision.com<\/a><br\/>RODER Instruments Division : <a href=\"http:\/\/www.rodervision.com\">www.innovacheck.com<\/a><br\/>More about RODER : <a href=\"https:\/\/roder.it\/en\/contacts\/\">about us<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The information contained in this website is provided for information purposes only. Although it has been prepared with the greatest 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=\"wp-block-paragraph\"><strong>Note:<\/strong> Some images on this website have been intentionally generated using artificial intelligence (AI). This is because, for many applications and projects, photographs of the actual installation or system cannot be disclosed owing to confidentiality agreements, contractual clauses and non-disclosure agreements (NDAs). <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Torque measurement with strain gauge sensors converts the elastic deformation of a sensing element into a signal proportional to the applied torsional moment: it is the basis of digital torque meters for the inspection of tightening operations, closures and threaded couplings. Torque (or torsional moment) is the product of a force and the arm at [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":19982,"parent":19981,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_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-20781","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Torque measurement - RODER SRL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/roder.it\/en\/technologies\/strain-gauge-technology-and-load-cells\/torque-measurement\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Torque measurement - RODER SRL\" \/>\n<meta property=\"og:description\" content=\"Torque measurement with strain gauge sensors converts the elastic deformation of a sensing element into a signal proportional to the applied torsional moment: it is the basis of digital torque meters for the inspection of tightening operations, closures and threaded couplings. 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