{"id":3247,"date":"2023-05-02T06:33:16","date_gmt":"2023-05-02T06:33:16","guid":{"rendered":"https:\/\/thermibel.be\/faq\/which-metals-should-be-chosen-for-rtds\/"},"modified":"2023-06-27T12:23:09","modified_gmt":"2023-06-27T12:23:09","slug":"which-metals-should-be-chosen-for-rtds","status":"publish","type":"faq","link":"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/","title":{"rendered":"Which metals should be chosen for RTDs?"},"content":{"rendered":"\n

All metals produce a positive change in resistance in response to a positive change in temperature<\/strong>, which is the main function of an RTD. System error is minimised where the RTD\u2019s resistance nominal value is large; this means using a metal wire with high resistivity.<\/strong> <\/p>\n\n\n\n

Resistivity of the metals used in RTDs<\/td><\/tr>
Metal<\/strong><\/td>Symbol<\/td>Resistivity \u03a9\u00b7cm\/f<\/td>Resistivity \u03a9\u00b7mm\u00b2\/m<\/td>Resistivity siemens<\/td><\/tr>
Gold<\/strong><\/td>Au<\/td>13<\/td>2,1612e-2<\/sup><\/td>4,6272e+7<\/sup><\/td><\/tr>
Silver<\/strong><\/td>Ag<\/td>8,8<\/td>1,4629e-2<\/sup><\/td>6,8356e+7<\/sup><\/td><\/tr>
Copper<\/strong><\/td>Cu<\/td>9,26<\/td>1,5394e-2<\/sup><\/td>6,496e+7<\/sup><\/td><\/tr>
Platinum<\/strong><\/td>Pt<\/td>59<\/td>9,8083e-2<\/sup><\/td>1,0195e+7<\/sup><\/td><\/tr>
Tungsten<\/strong><\/td>W<\/td>30<\/td>4,9873e-2<\/sup><\/td>2,0051e+7<\/sup><\/td><\/tr>
Nickel<\/strong><\/td>Ni<\/td>36<\/td>5,9847e-2<\/sup><\/td>1,6709e+7<\/sup><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Due to their low resistivity, gold and silver<\/strong> are rarely used in RTDs.<\/p>\n\n\n\n

Le tungst\u00e8ne<\/strong> a une r\u00e9sistivit\u00e9 relativement \u00e9lev\u00e9e, mais est r\u00e9serv\u00e9 pour des applications \u00e0 tr\u00e8s hautes temp\u00e9ratures parce qu’il est extr\u00eamement fragile et difficile \u00e0 travailler.<\/p>\n\n\n\n

Tungsten<\/strong> has a relatively high resistivity, but is reserved for applications at very high temperatures because it is extremely fragile and difficult to work. Its upper temperature limit is only around 120 \u00b0C.<\/p>\n\n\n\n

The most common RTDs are made of platinum, nickel or nickel alloys<\/strong>. Wires in nickel alloy are economic and used in a restricted temperature range, but they are non-linear and tend to drift over time. <\/p>\n\n\n\n

Platinum is the obvious<\/strong> choice for all measurements.<\/p>\n","protected":false},"featured_media":0,"template":"","format":"standard","class_list":["post-3247","faq","type-faq","status-publish","format-standard","hentry"],"acf":[],"aioseo_notices":[],"yoast_head":"\nWhich metals should be chosen for RTDs? - Thermibel<\/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:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which metals should be chosen for RTDs? - Thermibel\" \/>\n<meta property=\"og:description\" content=\"All metals produce a positive change in resistance in response to a positive change in temperature, which is the main function of an RTD. System error is minimised where the RTD\u2019s resistance nominal value is large; this means using a metal wire with high resistivity. Resistivity of the metals used in RTDs Metal Symbol Resistivity […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermibel\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-27T12:23:09+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/\",\"url\":\"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/\",\"name\":\"Which metals should be chosen for RTDs? - Thermibel\",\"isPartOf\":{\"@id\":\"https:\/\/thermibel.be\/en\/#website\"},\"datePublished\":\"2023-05-02T06:33:16+00:00\",\"dateModified\":\"2023-06-27T12:23:09+00:00\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/thermibel.be\/en\/#website\",\"url\":\"https:\/\/thermibel.be\/en\/\",\"name\":\"Thermibel\",\"description\":\"Un Haut Degr\u00e9 de Qualit\u00e9\",\"publisher\":{\"@id\":\"https:\/\/thermibel.be\/en\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/thermibel.be\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/thermibel.be\/en\/#organization\",\"name\":\"Thermibel\",\"url\":\"https:\/\/thermibel.be\/en\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/thermibel.be\/en\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/thermibel.be\/app\/uploads\/2023\/08\/logo_fr-1.png\",\"contentUrl\":\"https:\/\/thermibel.be\/app\/uploads\/2023\/08\/logo_fr-1.png\",\"width\":275,\"height\":59,\"caption\":\"Thermibel\"},\"image\":{\"@id\":\"https:\/\/thermibel.be\/en\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Which metals should be chosen for RTDs? - Thermibel","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/","og_locale":"en_US","og_type":"article","og_title":"Which metals should be chosen for RTDs? - Thermibel","og_description":"All metals produce a positive change in resistance in response to a positive change in temperature, which is the main function of an RTD. System error is minimised where the RTD\u2019s resistance nominal value is large; this means using a metal wire with high resistivity. Resistivity of the metals used in RTDs Metal Symbol Resistivity […]","og_url":"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/","og_site_name":"Thermibel","article_modified_time":"2023-06-27T12:23:09+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/","url":"https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/","name":"Which metals should be chosen for RTDs? - Thermibel","isPartOf":{"@id":"https:\/\/thermibel.be\/en\/#website"},"datePublished":"2023-05-02T06:33:16+00:00","dateModified":"2023-06-27T12:23:09+00:00","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/thermibel.be\/en\/faq\/which-metals-should-be-chosen-for-rtds\/"]}]},{"@type":"WebSite","@id":"https:\/\/thermibel.be\/en\/#website","url":"https:\/\/thermibel.be\/en\/","name":"Thermibel","description":"Un Haut Degr\u00e9 de Qualit\u00e9","publisher":{"@id":"https:\/\/thermibel.be\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/thermibel.be\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/thermibel.be\/en\/#organization","name":"Thermibel","url":"https:\/\/thermibel.be\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/thermibel.be\/en\/#\/schema\/logo\/image\/","url":"https:\/\/thermibel.be\/app\/uploads\/2023\/08\/logo_fr-1.png","contentUrl":"https:\/\/thermibel.be\/app\/uploads\/2023\/08\/logo_fr-1.png","width":275,"height":59,"caption":"Thermibel"},"image":{"@id":"https:\/\/thermibel.be\/en\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/thermibel.be\/en\/wp-json\/wp\/v2\/faq\/3247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thermibel.be\/en\/wp-json\/wp\/v2\/faq"}],"about":[{"href":"https:\/\/thermibel.be\/en\/wp-json\/wp\/v2\/types\/faq"}],"wp:attachment":[{"href":"https:\/\/thermibel.be\/en\/wp-json\/wp\/v2\/media?parent=3247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}