{"id":26877,"date":"2026-07-04T15:30:14","date_gmt":"2026-07-04T13:30:14","guid":{"rendered":"https:\/\/roder.it\/products\/diacheck-ctfr-series-railway-wheel-gauges\/gauges-diacheck-ctfr-standard\/"},"modified":"2026-10-06T12:12:50","modified_gmt":"2026-10-06T10:12:50","slug":"gauges-diacheck-ctfr-standard","status":"publish","type":"page","link":"https:\/\/roder.it\/en\/products\/diacheck-ctfr-series-railway-wheel-gauges\/gauges-diacheck-ctfr-standard\/","title":{"rendered":"Gauges DIACHECK-CTFR Standard"},"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-large has-custom-border\"><img decoding=\"async\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/roder-diacheck_ctfr-modello_standard_vista_anteriore_inferiore-web_image-1200x1200-1.webp\" alt=\"DIACHECK-CTFR Standard railway wheel gauge\" style=\"border-width:1px;border-top-left-radius:20px;border-top-right-radius:20px;border-bottom-left-radius:20px;border-bottom-right-radius:20px\" \/><\/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\">The RODER <strong>DIACHECK-CTFR Standard<\/strong> is a portable contact gauge for measuring the <strong>diameter of railway wheels<\/strong> directly on the vehicle, without dismantling, with a measuring range of 320\u20131000 mm on the tread.<\/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>Direct measurement on the vehicle:<\/strong> wheel diameter without dismantling<\/li>\n\n\n\n<li><strong>Three-point contact:<\/strong> repeatable readings<\/li>\n\n\n\n<li><strong>Measuring range:<\/strong> 320\u20131000 mm<\/li>\n\n\n\n<li><strong>Magnetic attachment:<\/strong> stable, repeatable positioning<\/li>\n\n\n\n<li><strong>Digital indicator:<\/strong> 8 mm LCD display, resolution 0.1 mm<\/li>\n\n\n\n<li><strong>Bluetooth version:<\/strong> data transmission and Android\/iOS app<\/li>\n\n\n\n<li><strong>Robust and portable:<\/strong> aluminium bracket, IP42, ~1,5\u20131,9 kg<\/li>\n\n\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\">The DIACHECK-CTFR measures the <strong>diameter of the railway wheel<\/strong> directly on the vehicle, without dismantling, using a <strong>three-point contact<\/strong> method and a digital indicator. It is suitable for locomotives, passenger coaches and freight wagons, both in the workshop and in the field, and attaches to the wheel by means of <strong>permanent magnets<\/strong> for stable, repeatable positioning. <\/p>\n\n<p class=\"wp-block-paragraph\">Robust construction with <strong>aluminium bracket<\/strong> and hardened steel support points, <strong>IP42<\/strong> protection and CR2032 battery power. The measuring range of this model is 320\u20131000 mm. The <strong>-BT<\/strong> version adds data transmission via Bluetooth with an Android\/iOS app for measurement traceability. <\/p>\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.roder-spec thead td{background:#e8edf1 !important;font-weight:700;border-bottom:2px solid #c3cfd7 !important;}.roder-spec tbody tr:nth-child(2n) td{background-color:#f2f6f8 !important;}.roder-spec tbody tr:nth-child(2n+1) td{background-color:#ffffff !important;}.roder-codici table thead td{background:#e8edf1;font-weight:700;}.roder-codici .is-style-stripes tbody tr:nth-child(2n){background-color:#f2f6f8;}.roder-codici .is-style-stripes tbody tr:nth-child(2n+1){background-color:#ffffff;}.roder-codici .codici-header{background:#e8edf1;border-bottom:2px solid #c3cfd7;margin-bottom:0;}.roder-codici .codici-header,.roder-codici .codici-row{padding:6px 12px !important;}.roder-codici .codici-header p{margin:8px 0;}.roder-codici .codici-row{margin-top:0;margin-bottom:0;}.roder-codici .codici-row p{margin:6px 0;}.roder-codici .codici-row .wp-block-column:first-child{text-align:center;}.roder-codici .codici-row figure.wp-block-image{margin-left:auto !important;margin-right:auto !important;}\n\n<h2 class=\"wp-block-heading\">Technical characteristics<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes roder-spec\"><table class=\"has-fixed-layout\"><thead><tr><td>Feature<\/td><td>Value<\/td><\/tr><\/thead><tbody><tr><td>Instrument type<\/td><td>Portable contact gauge for measuring the diameter of railway wheels<\/td><\/tr><tr><td>Measuring method<\/td><td>Three-point contact with digital indicator<\/td><\/tr><tr><td>Measuring range<\/td><td>320\u20131000 mm (wheel diameter on the tread)<\/td><\/tr><tr><td>Accuracy<\/td><td>\u00b10.1 mm in comparative measurement (or 0.1% of the range in absolute measurement)<\/td><\/tr><tr><td>Repeatability<\/td><td>0.1 mm (on calibrator)<\/td><\/tr><tr><td>Resolution<\/td><td>0.1 mm (programmable down to 0.01 mm)<\/td><\/tr><tr><td>Display<\/td><td>LCD, 8 mm digits<\/td><\/tr><tr><td>Attachment to the wheel<\/td><td>permanent magnets<\/td><\/tr><tr><td>Mechanical support<\/td><td>aluminium bracket with hardened steel support points<\/td><\/tr><tr><td>Protection<\/td><td>IP42<\/td><\/tr><tr><td>Weight<\/td><td>1500\u20131900 g<\/td><\/tr><tr><td>Data transmission<\/td><td>Bluetooth (-BT version only); Android \/ iOS app<\/td><\/tr><tr><td>Power supply<\/td><td>CR2032 battery<\/td><\/tr><tr><td>Certifications<\/td><td>CE<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<div class=\"wp-block-group roder-codici is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Part numbers, accessories and spare parts<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Codes for ordering the DIACHECK-CTFR Standard, the Bluetooth versions and the accessories (case and calibrators).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Instrument \u2013 complete kit<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:280px\">\n<figure class=\"wp-block-image size-large is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/roder-diacheck_ctfr-modello_standard_vista_anteriore_inferiore-web_image-1200x1200-1.webp\" alt=\"product\" style=\"border-color:#cccccc;border-width:1px;border-radius:12px;width:260px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><td>Part number<\/td><td>Product code<\/td><td>Description<\/td><\/tr><\/thead><tbody><tr><td><strong>10-15-20<\/strong><\/td><td>DIACHECK-CTFR-STANDARD<\/td><td>Portable gauge for wheel diameter 320\u20131000 mm \u2013 without Bluetooth<\/td><\/tr><tr><td><strong>10-15-21<\/strong><\/td><td>DIACHECK-CTFR-STANDARD-BT<\/td><td>Portable gauge for wheel diameter 320\u20131000 mm \u2013 with Bluetooth<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Accessories<\/h3>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-header is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<p class=\"wp-block-paragraph\"><strong>Photo<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>Part number<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\"><strong>Product code<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Description<\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-row is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<figure class=\"wp-block-image aligncenter size-medium is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2023\/02\/product_image_coming_soon_600x600.png\" alt=\"DIACHECK-CTFR-CASE\" style=\"border-color:#cccccc;border-width:1px;border-radius:8px;object-fit:contain;width:96px;height:96px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>10-15-26<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\">DIACHECK-CTFR-CASE<\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Padded case for carrying and protecting the instrument<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-row has-background is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\" style=\"background-color:#f2f6f8\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<figure class=\"wp-block-image aligncenter size-medium is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2023\/02\/product_image_coming_soon_600x600.png\" alt=\"DIACHECK-CTFR-CAL860\" style=\"border-color:#cccccc;border-width:1px;border-radius:8px;object-fit:contain;width:96px;height:96px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>10-15-27<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\">DIACHECK-CTFR-CAL860<\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Calibrator for railway gauge, nominal diameter 860 mm, with measurement certificate<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-row is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<figure class=\"wp-block-image aligncenter size-medium is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2023\/02\/product_image_coming_soon_600x600.png\" alt=\"DIACHECK-CTFR-CAL880\" style=\"border-color:#cccccc;border-width:1px;border-radius:8px;object-fit:contain;width:96px;height:96px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>10-15-28<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\">DIACHECK-CTFR-CAL880<\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Calibrator for railway gauge, nominal diameter 880 mm, with measurement certificate<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-row has-background is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\" style=\"background-color:#f2f6f8\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<figure class=\"wp-block-image aligncenter size-medium is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2023\/02\/product_image_coming_soon_600x600.png\" alt=\"DIACHECK-CTFR-CAL900\" style=\"border-color:#cccccc;border-width:1px;border-radius:8px;object-fit:contain;width:96px;height:96px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>10-15-29<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\">DIACHECK-CTFR-CAL900<\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Calibrator for railway gauge, nominal diameter 900 mm, with measurement certificate<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-row is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<figure class=\"wp-block-image aligncenter size-medium is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2023\/02\/product_image_coming_soon_600x600.png\" alt=\"DIACHECK-CTFR-CAL920\" style=\"border-color:#cccccc;border-width:1px;border-radius:8px;object-fit:contain;width:96px;height:96px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>10-15-30<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\">DIACHECK-CTFR-CAL920<\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Calibrator for railway gauge, nominal diameter 920 mm, with measurement certificate<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center codici-row has-background is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\" style=\"background-color:#f2f6f8\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:110px\">\n<figure class=\"wp-block-image aligncenter size-medium is-resized has-custom-border\"><img decoding=\"async\" class=\"has-border-color\" src=\"https:\/\/roder.it\/wp-content\/uploads\/2023\/02\/product_image_coming_soon_600x600.png\" alt=\"DIACHECK-CTFR-CAL940\" style=\"border-color:#cccccc;border-width:1px;border-radius:8px;object-fit:contain;width:96px;height:96px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:22%\">\n<p class=\"wp-block-paragraph\"><strong>10-15-31<\/strong><\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:26%\">\n<p class=\"wp-block-paragraph\">DIACHECK-CTFR-CAL940<\/p>\n<\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Calibrator for railway gauge, nominal diameter 940 mm, with measurement certificate<\/p>\n<\/div>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Technical documentation<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes roder-spec\"><table class=\"has-fixed-layout\"><thead><tr><td>Document<\/td><td>Type<\/td><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/roder-diacheck_ctfr-catalogo_tutta_la_famiglia_calibri_ferroviari_lingua_inglese_v003-catalog.pdf\" target=\"_blank\" rel=\"noopener\">DIACHECK-CTFR family catalogue (EN)<\/a><\/td><td>Catalogue (PDF)<\/td><\/tr><tr><td><a href=\"https:\/\/roder.it\/wp-content\/uploads\/2026\/07\/roder-diacheck_ctfr-modello_standard_dettagli_tecnici_ingombri_e_dimensioni-pdf_drawing.pdf\" target=\"_blank\" rel=\"noopener\">Standard dimensional drawing<\/a><\/td><td>Technical drawing (PDF)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\"><strong class=\"schema-faq-question\">How does the DIACHECK-CTFR measure the wheel diameter?<\/strong><p class=\"schema-faq-answer\">With a three-point contact method and a digital indicator, directly on the vehicle and without dismantling the wheel.<\/p><\/div><div class=\"schema-faq-section\"><strong class=\"schema-faq-question\">What is the difference between Standard, Compact and Extended?<\/strong><p class=\"schema-faq-answer\">The diameter measuring range: Standard 320\u20131000 mm, Compact 300\u2013950 mm, Extended 910\u20131400 mm. This model covers 320\u20131000 mm.<\/p><\/div><div class=\"schema-faq-section\"><strong class=\"schema-faq-question\">Does it transmit data to a PC or smartphone?<\/strong><p class=\"schema-faq-answer\">The -BT version transmits via Bluetooth with an Android\/iOS app for recording and tracing measurements.<\/p><\/div><div class=\"schema-faq-section\"><strong class=\"schema-faq-question\">How is it attached to the wheel?<\/strong><p class=\"schema-faq-answer\">By means of integrated permanent magnets, which ensure stable, repeatable attachment to the wheel surface.<\/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>The RODER DIACHECK-CTFR Standard is a portable contact gauge for measuring the diameter of railway wheels directly on the vehicle, without dismantling, with a measuring range of 320\u20131000 mm on the tread. The DIACHECK-CTFR measures the diameter of the railway wheel directly on the vehicle, without dismantling, using a three-point contact method and a digital [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":0,"parent":18234,"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-26877","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gauges DIACHECK-CTFR Standard - 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\/products\/diacheck-ctfr-series-railway-wheel-gauges\/gauges-diacheck-ctfr-standard\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gauges DIACHECK-CTFR Standard - RODER SRL\" \/>\n<meta property=\"og:description\" content=\"The RODER DIACHECK-CTFR Standard is a portable contact gauge for measuring the diameter of railway wheels directly on the vehicle, without dismantling, with a measuring range of 320\u20131000 mm on the tread. 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They attach to the wheel with permanent magnets and give fast, repeatable readings, with 0.1\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"diacheck calibro per ruote ferroviarie misura diametro di rotolamento","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":26917,"url":"https:\/\/roder.it\/en\/products\/diacheck-ctfr-series-railway-wheel-gauges\/gauges-diacheck-ctfr-extended\/","url_meta":{"origin":26877,"position":1},"title":"Gauges DIACHECK-CTFR Extended","author":"GSM","date":"4 July 2026","format":false,"excerpt":"The RODER DIACHECK-CTFR Extended is a portable contact gauge for measuring the diameter of railway wheels directly on the vehicle, without dismantling, with a measuring range of 910\u20131400 mm on the tread. Direct measurement on the vehicle: wheel diameter without dismantling Three-point contact: repeatable readings Measuring range: 910\u20131400 mm Magnetic\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":26901,"url":"https:\/\/roder.it\/en\/products\/diacheck-ctfr-series-railway-wheel-gauges\/diacheck-ctft-compact-gauges\/","url_meta":{"origin":26877,"position":2},"title":"DIACHECK-CTFT Compact gauges","author":"GSM","date":"4 July 2026","format":false,"excerpt":"The RODER DIACHECK-CTFR Compact is a portable contact gauge for measuring the diameter of railway wheels directly on the vehicle, without dismantling, with a measuring range of 300\u2013950 mm on the tread. Direct measurement on the vehicle: wheel diameter without dismantling Three-point contact: repeatable readings Measuring range: 300\u2013950 mm Magnetic\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":15394,"url":"https:\/\/roder.it\/prodotti\/calibri-per-ruote-ferroviarie-serie-diacheck-ctfr\/calibri-diacheck-ctfr-standard\/","url_meta":{"origin":26877,"position":3},"title":"Calibri DIACHECK-CTFR Standard","author":"GSM","date":"4 July 2026","format":false,"excerpt":"Il DIACHECK-CTFR Standard di RODER \u00e8 un calibro portatile a contatto per la misura del diametro delle ruote ferroviarie direttamente sul veicolo, senza smontaggio, con campo di misura 320\u20131000 mm sul piano di rotolamento. Misura diretta sul veicolo : diametro ruota senza smontaggio Contatto a tre punti : letture ripetibili\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":26889,"url":"https:\/\/roder.it\/de\/produkte\/eisenbahnradlehren-der-serie-diacheck-ctfr\/lehren-diacheck-ctfr-standard\/","url_meta":{"origin":26877,"position":4},"title":"Lehren DIACHECK-CTFR Standard","author":"GSM","date":"4 July 2026","format":false,"excerpt":"Das DIACHECK-CTFR Standard von RODER ist eine tragbare ber\u00fchrende Messlehre zur Messung des Durchmessers von Eisenbahnr\u00e4dern direkt am Fahrzeug, ohne Ausbau, mit einem Messbereich von 320\u20131000 mm an der Lauffl\u00e4che. Direkte Messung am Fahrzeug: Raddurchmesser ohne Ausbau Dreipunktkontakt: wiederholbare Messwerte Messbereich: 320\u20131000 mm Magnetische Befestigung: stabile und wiederholbare Positionierung Digitale\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14903,"url":"https:\/\/roder.it\/prodotti\/calibri-per-ruote-ferroviarie-serie-diacheck-ctfr\/","url_meta":{"origin":26877,"position":5},"title":"Calibri per ruote ferroviarie serie DIACHECK-CTFR","author":"GSM","date":"26 June 2026","format":false,"excerpt":"RODER \u00b7 Calibri ferroviari DIACHECK-CTFR Calibri per ruote ferroviarie DIACHECK-CTFR I calibri DIACHECK-CTFR di RODER misurano il diametro delle ruote ferroviarie direttamente sul veicolo, senza smontaggio, con un metodo a contatto a tre punti e comparatore digitale. Si agganciano alla ruota con magneti permanenti e forniscono letture rapide e ripetibili,\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"diacheck calibro per ruote ferroviarie misura diametro di rotolamento","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2025\/05\/diacheck_ctfr_misura_diametro_ruote_ferroviarie_strumento_1600x1600.png?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/26877","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=26877"}],"version-history":[{"count":4,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/26877\/revisions"}],"predecessor-version":[{"id":26881,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/26877\/revisions\/26881"}],"up":[{"embeddable":true,"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/pages\/18234"}],"wp:attachment":[{"href":"https:\/\/roder.it\/en\/wp-json\/wp\/v2\/media?parent=26877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}