{"id":25918,"date":"2026-06-29T17:40:51","date_gmt":"2026-06-29T15:40:51","guid":{"rendered":"https:\/\/roder.it\/applications\/steel-and-metals\/speed-and-length-of-hot-strip\/"},"modified":"2026-10-05T13:28:08","modified_gmt":"2026-10-05T11:28:08","slug":"speed-and-length-of-hot-strip","status":"publish","type":"page","link":"https:\/\/roder.it\/en\/applications\/steel-and-metals\/speed-and-length-of-hot-strip\/","title":{"rendered":"Speed and length of hot strip"},"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=\"300\" height=\"300\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-appl_nastro_lamiera_alta_velocita_lucido-web_image-300x300-1.webp\" alt=\"Non-contact speed and length measurement on hot strips and plates\" class=\"wp-image-14966\" 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\/06\/astech-velocimetri_ottici_vlm500-appl_nastro_lamiera_alta_velocita_lucido-web_image-300x300-1.webp 300w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-appl_nastro_lamiera_alta_velocita_lucido-web_image-300x300-1-150x150.webp?crop=1 150w, https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-appl_nastro_lamiera_alta_velocita_lucido-web_image-300x300-1-120x120.webp?crop=1 120w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/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\">On <strong>hot strips and plates<\/strong>, <strong>non-contact<\/strong> measurement of speed and length remains accurate even on <strong>red-hot<\/strong> materials, where scale, high temperatures and high speeds make contact systems unsuitable.<\/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>Non-contact measurement:<\/strong> even on red-hot materials<\/li>\n\n\n\n<li><strong>High temperature:<\/strong> no contact with scale<\/li>\n\n\n\n<li><strong>High speed:<\/strong> up to 50 m\/s<\/li>\n\n\n\n<li><strong>High accuracy:<\/strong> uncertainty down to 0.025 %<\/li>\n\n\n\n<li><strong>No wear:<\/strong> no measuring wheel<\/li>\n\n\n\n<li><strong>Cut-to-length:<\/strong> accurate and repeatable length<\/li>\n\n\n\n<li><strong>Simple integration:<\/strong> encoder outputs and fieldbus<\/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\">Measuring the <strong>speed and length of hot strips<\/strong> is among the most demanding tasks in the steel industry: high temperatures, scale and high line speeds make contact systems unsuitable. <a href=\"https:\/\/roder.it\/strumenti\/velocimetri-encoder-ottici\/\">ASTech optical velocimeters<\/a> measure <strong>without contact<\/strong> even on red-hot materials, maintaining accuracy and repeatability. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This page is part of the <a href=\"https:\/\/roder.it\/en\/applications\/steel-and-metals\/\">Steel and metals<\/a> section and explains how to measure reliably on hot strips and plates, for example in rolling mills and continuous casting lines.<\/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<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Why hot measurement is critical<\/h2>\n\n<p class=\"wp-block-paragraph\">On hot products the surface is red-hot, irregular and covered with scale; in addition, the material can oscillate vertically (flutter) and travel at very high speeds. In these conditions measuring wheels wear quickly, slip and introduce errors. However, speed and length control must remain accurate, because it determines elongation, synchronisation between the stands and the quality of the downstream cut. As a result, a stable and robust non-contact measurement becomes indispensable.   <\/p>\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/roder.it\/strumenti\/velocimetri-encoder-ottici\/velocimetri-ottici-serie-vlm500\/\">VLM500<\/a> measures up to <strong>50 m\/s<\/strong> with an uncertainty of less than <strong>0.025 %<\/strong> and, thanks to the automatic adjustment of exposure and brightness, also handles the red-hot and variable surfaces of hot products.<\/p>\n\n<h2 class=\"wp-block-heading\">Protection and cooling for high temperature<\/h2>\n\n<p class=\"wp-block-paragraph\">To work in front of a red-hot strip, the instrument is housed in a <strong>protective housing<\/strong> with water or air cooling and <strong>pressurisation<\/strong>: in this way the optical window stays clean and the sensor temperature is kept under control. For example, a protective nozzle and an air flow keep the optics free from scale and fumes. In addition, the available working distances (up to 330 mm with the VLM500E version) make it possible to keep the instrument at a safe distance from radiant heat.  <\/p>\n\n<h2 class=\"wp-block-heading\">Advantages on hot strips<\/h2>\n\n<ul class=\"wp-block-list is-style-checkmark\">\n<li>Non-contact measurement on red-hot materials<\/li>\n\n\n\n<li>Speed up to 50 m\/s and uncertainty &lt; 0.025 %<\/li>\n\n\n\n<li>Cooling and pressurisation housings for high temperature<\/li>\n\n\n\n<li>Tolerance to strip flutter thanks to the wide working range<\/li>\n\n\n\n<li>No wear: high availability in continuous operation<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Elongation control and synchronisation<\/h2>\n\n<p class=\"wp-block-paragraph\">In rolling mills, measuring the speed of the product at several points makes it possible to calculate <strong>elongation<\/strong> and to adjust the ratios between the stands, avoiding tension or looping. Likewise, knowing the actual speed of the strip makes it possible to synchronise the downstream drives, such as shears and coilers. For this reason optical measurement is not only used to count metres, but contributes to the overall stability of the rolling process.  <\/p>\n\n<p class=\"wp-block-paragraph\">The length measurement, obtained by integration, then feeds the cut-to-length and piece sizing functions described on the <a href=\"https:\/\/roder.it\/applicazioni-e-soluzioni\/siderurgia-e-metalli\/taglio-e-slitting\/\">Cutting and Slitting<\/a> page.<\/p>\n\n<h2 class=\"wp-block-heading\">Recommended products<\/h2>\n\n<div class=\"wp-block-group alignwide is-layout-grid wp-container-core-group-is-layout-b251d530 wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-border-color has-white-background-color has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-color:#e0e0e0;border-width:1px;border-radius:8px;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/roder.it\/strumenti\/velocimetri-encoder-ottici\/velocimetri-ottici-serie-vlm500\/\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-vlm500_foto_prodotto_assonometria_vista-web_image-510x510-1.webp\" alt=\"VLM500 optical speed meters\" style=\"border-radius:6px;aspect-ratio:4\/3;object-fit:contain\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.385), 17px);\">VLM500 optical speed meters<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">Speeds up to 50 m\/s, uncertainty &lt; 0.025 %, CCD spatial filter.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/roder.it\/strumenti\/velocimetri-encoder-ottici\/velocimetri-ottici-serie-vlm500\/\" style=\"font-size:14px\">Discover<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-border-color has-white-background-color has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-color:#e0e0e0;border-width:1px;border-radius:8px;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/roder.it\/strumenti\/velocimetri-encoder-ottici\/velocimetri-ottici-serie-vlm60\/\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm60-vlm60_foto_prodotto_vista_anteriore-web_image-480x480-1.webp\" alt=\"VLM60 optical encoder\" style=\"border-radius:6px;aspect-ratio:4\/3;object-fit:contain\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.385), 17px);\">VLM60 optical encoder<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">A replacement for measuring wheels, measuring down to 0 m\/s.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/roder.it\/strumenti\/velocimetri-encoder-ottici\/velocimetri-ottici-serie-vlm60\/\" style=\"font-size:14px\">Discover<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-border-color has-white-background-color has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-color:#e0e0e0;border-width:1px;border-radius:8px;padding-top:16px;padding-right:16px;padding-bottom:16px;padding-left:16px\">\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/roder.it\/applicazioni-e-soluzioni\/siderurgia-e-metalli\/taglio-e-slitting\/\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-appl_nastro_lamiera_alta_velocita-web_image-300x300-1.webp\" alt=\"Cutting and slitting\" style=\"border-radius:6px;aspect-ratio:4\/3;object-fit:contain\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.385), 17px);\">Cutting and slitting<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">Cut-to-length and slitting with high accuracy.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/roder.it\/applicazioni-e-soluzioni\/siderurgia-e-metalli\/taglio-e-slitting\/\" style=\"font-size:14px\">Discover<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Where it is installed in rolling mills<\/h2>\n\n<p class=\"wp-block-paragraph\">The measurement on hot products can be located at different points of the rolling mill. Upstream, immediately after the first stands, it provides the entry speed needed to calculate elongation. Between the intermediate stands it makes it possible to balance tensions, avoiding looping or tearing of the material. Downstream, before the shears and coilers, it guarantees the correct length for cutting and coiling. In each position, the working distance and the protective housing are chosen according to the temperature and the space available.    <\/p>\n\n<p class=\"wp-block-paragraph\">Since hot products emit strong thermal radiation, it is good practice to keep the instrument at an adequate distance and to shield it with a cooled protective nozzle. In this way the optical quality of the measurement is preserved even close to material at very high temperature. <\/p>\n\n<h2 class=\"wp-block-heading\">Stability of the measurement over time<\/h2>\n\n<p class=\"wp-block-paragraph\">One of the main advantages in this type of application is <strong>long-term stability<\/strong>. Measuring wheels, in contact with hot and abrasive products, deteriorate within a few weeks and require continuous recalibration. The optical velocimeter, having no contacting parts, instead keeps its accuracy constant for years. As a result, the number of line stoppages for maintenance and recalibration is drastically reduced, with a direct impact on plant productivity.   <\/p>\n\n<p class=\"wp-block-paragraph\">In addition, the repeatability of the measurement facilitates automation: the process parameters can be based on a stable signal, without having to compensate for drift due to wear. This makes the solution particularly suitable for plants that operate continuously over several shifts, where reliability is an essential requirement. <\/p>\n\n<h2 class=\"wp-block-heading\">Integration with the automation system<\/h2>\n\n<p class=\"wp-block-paragraph\">The speed and length signal is made available through incremental encoder outputs, an analogue current output and the main industrial fieldbuses. As a result, integration with the line PLC and with supervision systems is simple and standardised. RODER technical support assists the customer in defining the configuration, choosing the protective housing and commissioning on site.  <\/p>\n\n<h2 class=\"wp-block-heading\">Application examples in the hot sector<\/h2>\n\n<p class=\"wp-block-paragraph\">The most frequent applications include measuring the strip speed at the exit of the roughing mill, checking the length before the flying shear and synchronising the hot coilers. In all these cases the optical velocimeter provides a stable speed reference independent of contact, on which the automation system builds its own control. In addition, on hot long products such as wire rod and bars, the measurement enables cut-to-length without the wear typical of wheels exposed to scale.  <\/p>\n\n<p class=\"wp-block-paragraph\">In short, the combination of non-contact measurement, cooling housings and a wide working range makes the VLM500 a reference instrument for the control of hot products, where reliability and continuity of operation are decisive for the productivity of the steelworks.<\/p>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-nastri-1\"><strong class=\"schema-faq-question\">Can the speed of a red-hot strip be measured without contact?<\/strong> <p class=\"schema-faq-answer\">Yes. The VLM500 optically measures speed and length even on red-hot strips and plates, thanks to the automatic exposure adjustment and the cooling housings. <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-nastri-2\"><strong class=\"schema-faq-question\">How accurate is the measurement on hot strips?<\/strong> <p class=\"schema-faq-answer\">The VLM500 offers an uncertainty of less than 0.025 % at the nominal distance, with speeds up to 50 m\/s and high repeatability.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-nastri-3\"><strong class=\"schema-faq-question\">How is the instrument protected from heat?<\/strong> <p class=\"schema-faq-answer\">With protective housings equipped with water or air cooling and pressurisation, which keep the optical window clean and the sensor temperature stable.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-nastri-4\"><strong class=\"schema-faq-question\">Does strip flutter affect the measurement?<\/strong> <p class=\"schema-faq-answer\">The wide working range and the different nominal distances (up to 330 mm) tolerate the vertical oscillations of the strip, keeping the measurement accurate.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-nastri-5\"><strong class=\"schema-faq-question\">What is speed measurement used for in rolling mills?<\/strong> <p class=\"schema-faq-answer\">It makes it possible to calculate elongation, adjust the ratios between the stands and synchronise downstream drives such as shears and coilers.<\/p> <\/div> <\/div>\n\n<h2 id=\"prodotti-collegati\" class=\"wp-block-heading has-ti-accent-color has-text-color\">Related products<\/h2>\n\n<p class=\"wp-block-paragraph\">The RODER instruments for this application. Go to the relevant catalogue pages for models, technical data and documentation. <\/p>\n\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-b251d530 wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-border-color has-white-background-color has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-color:#e0e0e0;border-width:1px;border-radius:8px;padding:16px\">\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/roder.it\/en\/products\/optical-encoder-speed-meters\/\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-appl_nastro_continuo_tappeti_continui-web_image-300x300-1.webp\" alt=\"Optical speed meters and encoders\" style=\"border-radius:6px;aspect-ratio:4\/3;object-fit:contain\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.385), 17px);\"><a href=\"https:\/\/roder.it\/en\/products\/optical-encoder-speed-meters\/\">Optical speed meters and encoders<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">VLM speed meters for non-contact measurement of speed and length.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/roder.it\/en\/products\/optical-encoder-speed-meters\/\" style=\"font-size:14px\">Browse the catalogue<\/a><\/div>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-group has-border-color has-white-background-color has-background is-layout-constrained wp-container-core-group-is-layout-10ff9433 wp-block-group-is-layout-constrained\" style=\"border-color:#e0e0e0;border-width:1px;border-radius:8px;padding:16px\">\n<figure class=\"wp-block-image size-large has-custom-border\"><a href=\"https:\/\/roder.it\/en\/products\/industrial-laser-distance-sensors\/\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2020\/01\/ldm_41_42_series_laser_distance_meters_industrial_applications_masterimage.png\" alt=\"Industrial LASER distance sensors\" style=\"border-radius:6px;aspect-ratio:4\/3;object-fit:contain\"\/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" style=\"font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.385), 17px);\"><a href=\"https:\/\/roder.it\/en\/products\/industrial-laser-distance-sensors\/\">Industrial LASER distance sensors<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:14px\">LDM LASER distance sensors for non-contact distance, position and level measurement.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/roder.it\/en\/products\/industrial-laser-distance-sensors\/\" style=\"font-size:14px\">Browse the catalogue<\/a><\/div>\n<\/div>\n<\/div>\n<\/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>On hot strips and plates, non-contact measurement of speed and length remains accurate even on red-hot materials, where scale, high temperatures and high speeds make contact systems unsuitable. Measuring the speed and length of hot strips is among the most demanding tasks in the steel industry: high temperatures, scale and high line speeds make contact [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":25919,"parent":19861,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"hot strip speed measurement","_yoast_wpseo_title":"Speed and length measurement on hot strips","_yoast_wpseo_metadesc":"Non-contact measurement of speed and length on hot strips and plates, even when red-hot. 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ASTech optical speed meters measure without contact, eliminating wear and slippage and maintaining accuracy even in the most severe conditions. This page brings\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"sistemi di misura dello spessore e della larghezza per nastri metallici su impianti di decapaggio e taglio lamiera","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2022\/10\/dimes_controllo_spessore_applicazione_linea.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2022\/10\/dimes_controllo_spessore_applicazione_linea.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2022\/10\/dimes_controllo_spessore_applicazione_linea.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2022\/10\/dimes_controllo_spessore_applicazione_linea.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":26021,"url":"https:\/\/roder.it\/en\/applications\/steel-and-metals\/drawing-line-speed\/","url_meta":{"origin":25918,"position":1},"title":"Drawing line speed","author":"GSM","date":"29 June 2026","format":false,"excerpt":"In drawing lines, non-contact measurement of speed and length on wire rod, bars, tubes and wires ensures cut-to-length and reliable process control, even at high speed. Non-contact measurement: no slippage or wear High speed: up to 50 m\/s High accuracy: uncertainty down to 0.025 % Metal surfaces: even bright or\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"ASTech optical velocimeter for speed measurement on drawn metal products, bars and tubes","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2026\/06\/astech-velocimetri_ottici_vlm500-appl_trafilato_metallico_barre_tubi-web_image-300x300-1.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":17621,"url":"https:\/\/roder.it\/en\/applications\/","url_meta":{"origin":25918,"position":2},"title":"Applications","author":"GSM","date":"29 June 2026","format":false,"excerpt":"The ASTech optical speed meters and encoders solve a problem common to a great many production lines: measuring the speed and length of the material accurately, repeatably and without contact. In this section we bring together the applications and solutions by sector, with a practical, result-oriented approach. For the theoretical\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"applicazione di handybox alla produzione industriale","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/04\/handybox_applicazione_controllo_qualita_produzione.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/04\/handybox_applicazione_controllo_qualita_produzione.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/04\/handybox_applicazione_controllo_qualita_produzione.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/04\/handybox_applicazione_controllo_qualita_produzione.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/04\/handybox_applicazione_controllo_qualita_produzione.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/04\/handybox_applicazione_controllo_qualita_produzione.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":18306,"url":"https:\/\/roder.it\/en\/products\/optical-encoder-speed-meters\/","url_meta":{"origin":25918,"position":3},"title":"Optical encoder speed meters","author":"GSM","date":"27 June 2026","format":false,"excerpt":"Non-contact optical speed meters and encoders for the precise measurement of speed and length in continuous industrial processes. Optical encoder speed meters measure the speed and length of moving materials with no mechanical contact at all, eliminating the slip and wear typical of measuring wheels. 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In this section, devoted to Inspection, we examine the physical quantity itself and the methods for measuring it,\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"verifica dimensionale interasse e posizione componenti elettronici con sistemi di visione artificiale","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2019\/05\/Untitled.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2019\/05\/Untitled.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2019\/05\/Untitled.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/25918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/users\/157040980"}],"replies":[{"embeddable":true,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/comments?post=25918"}],"version-history":[{"count":3,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/25918\/revisions"}],"predecessor-version":[{"id":25922,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/25918\/revisions\/25922"}],"up":[{"embeddable":true,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/19861"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/media\/25919"}],"wp:attachment":[{"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/media?parent=25918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}