{"id":46,"date":"2018-01-11T08:14:12","date_gmt":"2018-01-11T08:14:12","guid":{"rendered":"https:\/\/www.orslabs.fr\/?page_id=46"},"modified":"2025-06-22T14:41:00","modified_gmt":"2025-06-22T12:41:00","slug":"gross-leak-test","status":"publish","type":"page","link":"https:\/\/www.orslabs.fr\/en\/hermeticity\/gross-leak-test\/","title":{"rendered":"Gross Leak Testing"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-luciu5cw-834c681dd99ea0456ad672bff3310e76\">\n#top .av-special-heading.av-luciu5cw-834c681dd99ea0456ad672bff3310e76{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-luciu5cw-834c681dd99ea0456ad672bff3310e76 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-luciu5cw-834c681dd99ea0456ad672bff3310e76 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-luciu5cw-834c681dd99ea0456ad672bff3310e76 av-special-heading-h1 blockquote modern-quote modern-centered  avia-builder-el-0  el_before_av_textblock  avia-builder-el-first  av-linked-heading'><h1 class='av-special-heading-tag'  itemprop=\"headline\"  >GROSS LEAK HERMETICITY TESTING PROCESSES<\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-jn4p4vzu-dc388e1d0a99c5d20a9c6f2a95bce84e '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2>HSHLD\u2122 Dry Gross Leak<\/h2>\n<p>The HSHLD\u2122 gross leak test method uses the oxygen signature and pressure change caused by a gross leaking device to screen for failures. The device under test is compared to a known good sample of the same volume; this comparison will reveal the presence of a leaking device. Please visit our<a href=\"https:\/\/orslabs.com\/test-equipment\/leak\/\">\u00a0<strong>HSHLD\u2122 MODEL 310 Hermeticity Testing<\/strong><\/a>\u00a0page for more information.<\/p>\n<h2>Per-Fluorocarbon Gross Leak<\/h2>\n<p>A device with a gross leak could theoretically pass the standard Helium fine leak test. Therefore, this test is typically performed after fine leak. Depending on the requirement of the specification being followed, gross leak may be performed by two different methods.<\/p>\n<ol>\n<li>The device is submerged in an indicator fluid tank at a specified high temperature of 125C, and observed for evidence of bubble stream emanating from a gross leak site. A lower temperature may be used depending on device material constraints.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>The test may require preconditioning in a pressurized chamber filled with an inert detector fluid that characteristically has a low boiling point. After preconditioning, the devices are submerged in an inert indicator fluid with a higher boiling point. In theory, any detector fluid located within the internal cavity of the package would boil when exposed to the high temperature of the indicator fluid, thus creating a bubble stream from the gross leak site.<\/li>\n<\/ol>\n<h2>Krypton-85 Dry Gross Leak<\/h2>\n<p>This test is typically performed prior to Fine Leak testing as a method of eliminating failures that would otherwise trap large amounts of radioactive Kr85 through longer term Fine leak pressurization. Visit our\u00a0<strong><a href=\"https:\/\/orslabs.com\/services\/hermeticity\/krypton-85-leak-test\/\">Krypton-85<\/a><\/strong>\u00a0page for more information.<\/p>\n<h2>Krypton-85 Wet Gross Leak<\/h2>\n<p>A large leak path can be deceiving to tracer gas detection. During the testing of a small cavity device it is possible for the tracer gas to escape giving the illusion of a passing device. Using the Kr-85 wet gross leak method dye is used to slow the movement of gas through the leak path while also creating a visual cue for leak site identification. This method is required in Mil-Standard Kr-85 testing for devices with a cavity &lt;0.1cc. Visit our\u00a0<strong><a href=\"https:\/\/orslabs.com\/services\/hermeticity\/krypton-85-leak-test\/\">Krypton-85<\/a><\/strong>\u00a0page for more information.<\/p>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<\/div><\/section>\n<div  class='flex_column av-1me9u-1817f2452cfcafdf1201569c30f2bd18 av_one_half  avia-builder-el-2  el_after_av_textblock  el_before_av_one_half  first flex_column_div  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-luciw7l2-cc24a430586b2156c919213485dbba05\">\n.avia-image-container.av-luciw7l2-cc24a430586b2156c919213485dbba05 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-luciw7l2-cc24a430586b2156c919213485dbba05 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-luciw7l2-cc24a430586b2156c919213485dbba05 av-styling- avia-align-center  avia-builder-el-3  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-905 avia-img-lazy-loading-not-905 avia_image ' src=\"https:\/\/www.orslabs.fr\/wp-content\/uploads\/2018\/10\/gross_leak-300x225.jpg\" alt='High Sensitivity Helium Leak Detection' title='Gross leak testing'  height=\"225\" width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.orslabs.fr\/wp-content\/uploads\/2018\/10\/gross_leak-300x225.jpg 300w, https:\/\/www.orslabs.fr\/wp-content\/uploads\/2018\/10\/gross_leak.jpg 306w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/div><\/div><\/div>\n<div  class='flex_column av-160ja-5da4d22aad8175a6325ec7c535d8764e av_one_half  avia-builder-el-4  el_after_av_one_half  el_before_av_textblock  flex_column_div  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lucix1qk-b8c6c2d125fbdc8574b568a183b4cb6c\">\n.avia-image-container.av-lucix1qk-b8c6c2d125fbdc8574b568a183b4cb6c img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lucix1qk-b8c6c2d125fbdc8574b568a183b4cb6c .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lucix1qk-b8c6c2d125fbdc8574b568a183b4cb6c av-styling- avia-align-center  avia-builder-el-5  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1017 avia-img-lazy-loading-not-1017 avia_image ' src=\"https:\/\/www.orslabs.fr\/wp-content\/uploads\/2019\/02\/Hermeticity2-Home-Page-300x225-300x225.jpg\" alt='' title='Hermeticity Testing Services'  height=\"225\" width=\"300\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/div>\n<section  class='av_textblock_section av-luciy8xk-862605ffbfc6574a74efcf835517c77d '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Fluorocarbon Gross Leak<\/em><\/p>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":13,"featured_media":0,"parent":43,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-46","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gross Leak Testing | Hermeticity | Oneida Research Services<\/title>\n<meta name=\"description\" content=\"The gross leak test is an inspection test based on the boiling points differential of two fluorocarbons. 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