{"id":40216,"date":"2026-01-14T15:25:52","date_gmt":"2026-01-14T15:25:52","guid":{"rendered":"https:\/\/calibration.consulting\/product\/isotech-471-simple-argon-apparatus\/"},"modified":"2026-01-14T15:25:52","modified_gmt":"2026-01-14T15:25:52","slug":"isotech-471-simple-argon-apparatus","status":"publish","type":"product","link":"https:\/\/calibration.consulting\/en\/product\/isotech-471-simple-argon-apparatus\/","title":{"rendered":"Isotech 471 Simple Argon Apparatus"},"content":{"rendered":"<p><!--StartFragment --><\/p>\n<p>The <a href=\"https:\/\/calibration.consulting\/en\/supplier\/isotech\/\" target=\"_blank\" rel=\"noopener\">Isotech<\/a> 471 Simple Argon Triple Point Apparatus is a redesigned and modernised system for realising the argon triple point (\u2013189.3442 \u00b0C), one of the defining fixed points of the ITS\u201190. Traditional argon systems were often expensive, complex and difficult to operate. The updated 471 model changes that by offering a more accessible, automated and efficient solution. Many laboratories still rely on liquid\u2011nitrogen comparators. Although inexpensive, LN\u2082 is not an ITS\u201190 fixed point and lies below the argon triple point. This creates pressure\u2011related issues inside SPRTs, increasing self\u2011heating effects and calibration uncertainty. The 471 apparatus eliminates these limitations by providing a true realisation of the argon triple point with stable, controlled pressure regulation.<\/p>\n<h3>A new generation of argon apparatus<\/h3>\n<p>The upgraded 471 introduces several improvements that enhance usability and performance:<\/p>\n<ul>\n<li>&gt; Automated electronic pressure control replaces the manual weight system.<\/li>\n<li>&gt; Additional pre\u2011cooling pocket improves efficiency and speeds stabilisation.<\/li>\n<li>&gt; Faster time to plateau reduces waiting time before calibration.<\/li>\n<li>&gt; LN\u2082 can be replenished during operation, extending calibration sessions.<\/li>\n<li>&gt; Faster filling time shortens setup and preparation.<\/li>\n<\/ul>\n<p>Inside the system, 6N\u2011pure argon is sealed in a pressure vessel. Liquid nitrogen cools the chamber to approximately \u2013195 \u00b0C, after which an electronic pressure controller raises the nitrogen boiling temperature to just above the argon point. The argon then settles into its triple\u2011point plateau for around four hours, providing a stable reference for SPRT calibration.<\/p>\n<h3>Why choose the Isotech 471 Simple Argon Apparatus?<\/h3>\n<p>The 471 offers a practical, safe and cost\u2011effective alternative to traditional systems:<\/p>\n<ul>\n<li>&gt; no high\u2011pressure gas handling<\/li>\n<li>&gt; no complex vacuum equipment<\/li>\n<li>&gt; no reliance on LN\u2082 comparators<\/li>\n<li>&gt; automated pressure control<\/li>\n<li>&gt; repeatable, traceable ITS\u201190 realisation<\/li>\n<\/ul>\n<p>It is a self\u2011contained, laboratory\u2011friendly system that delivers reliable triple\u2011point performance without the cost or complexity of older designs.<\/p>\n<h3>What is the argon triple point?<\/h3>\n<p>The argon triple point (\u2013189.3442 \u00b0C) is a defining ITS\u201190 fixed point where argon exists simultaneously as a solid, liquid and gas in equilibrium. It is primarily used for calibrating Standard Platinum Resistance Thermometers (SPRTs) and is essential for national metrology institutes and accredited calibration centres requiring the lowest uncertainties.<\/p>\n<p>The Isotech 471 Simple Argon Triple Point Apparatus brings true argon triple\u2011point realisation within reach for more laboratories than ever. With automated pressure control, faster stabilisation and a simplified operating concept, it provides a reliable, efficient and fully traceable solution for SPRT calibration at the lowest ITS\u201190 fixed point.<\/p>\n<p><!--EndFragment --><\/p>\n","protected":false},"excerpt":{"rendered":"<ul class=\"product--features\">\n<li>Temperature Range -189.3442\u00b0C<\/li>\n<li>Robust and simple to use<\/li>\n<li>Accurate to \u00b10.8mK &#8211; 4 hour plateau typical<\/li>\n<\/ul>\n","protected":false},"featured_media":40215,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_seopress_titles_title":"Isotech 471 Simple Argon Triple Point Apparatus","_seopress_titles_desc":"The Isotech 471 Simple Argon Triple Point Apparatus is a redesigned and modernised system for realising the argon triple point (\u2013189.3442 \u00b0C), one of the defining fixed points of the ITS\u201190. ","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[]},"product_brand":[],"product_cat":[249,263,264,268],"product_tag":[],"class_list":["post-40216","product","type-product","status-publish","has-post-thumbnail","product_cat-calibration-en","product_cat-temperature-calibration","product_cat-baths","product_cat-primary-standards","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product\/40216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/comments?post=40216"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/media\/40215"}],"wp:attachment":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/media?parent=40216"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_brand?post=40216"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_cat?post=40216"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_tag?post=40216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}