{"id":38452,"date":"2024-03-26T16:38:35","date_gmt":"2024-03-26T16:38:35","guid":{"rendered":"https:\/\/www.alicat.com\/?post_type=article&#038;p=38452"},"modified":"2026-02-03T20:42:58","modified_gmt":"2026-02-03T20:42:58","slug":"schnelle-flexible-dichtheitsprufung-fur-einweg-bioprozesse","status":"publish","type":"support","link":"https:\/\/www.alicat.com\/de\/support\/fast-flexible-leak-testing-for-single-use-bioprocessing\/","title":{"rendered":"Genaue und vereinfachte Druckabfall-Lecktests f\u00fcr Single-Use-Bioprozesse"},"content":{"rendered":"\n[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.23.1&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row _builder_version=&#8221;4.23.1&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.23.1&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Accurate and simplified pressure decay leak testing for single-use bioprocessing&#8221; _builder_version=&#8221;4.23.1&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; sticky_enabled=&#8221;0&#8243;]The advancement of single-use technology is rapidly accelerating the evolution of bioprocessing applications, posing numerous benefits over traditional multi-use equipment. Single-use technology, specifically bioreactors, reduces the risk of cross-contamination between batches, increases flexibility, decreases cycle times for process skids, <em>and<\/em> eliminates costly, time-consuming cleaning steps.\n\nThere is, however, a new challenge: This equipment is susceptible to system leaks.\n<h2>Challenge: Leak testing single-use bioreactors<\/h2>\nSingle-use bioreactors (SUBs) are simply plastic bags that often arrive at the manufacturer pre-sterilized by gamma irradiation, already including all necessary single-use sensors. The bioreactor manufacturers conduct highly sensitive helium integrity tests as part of their in-house quality control measures. However, the bioreactor bag is then removed from the test setup, packaged, and shipped to the pharmaceutical manufacturer. It is then unboxed and installed into its holding container as part of a larger setup.\n\nThese handling steps all introduce the potential for damage to the bag. As system integrity is critical for any bioprocess, it is common to conduct pressure decay tests at the point of use. However, conventional pressure testing methods pose additional challenges:\n<ul>\n\t<li><span style=\"color: #000000;\">Conventional pressure decay testing is not sensitive enough to detect small leaks.<\/span><\/li>\n\t<li><span style=\"color: #000000;\">Helium integrity testing is highly time-consuming and introduces an unnecessary gas into the cleanroom environment.<\/span><\/li>\n<\/ul>\n<h2>Solution: One device to control pressure and monitor mass flow<\/h2>\nFast <em>and<\/em> accurate <a href=\"https:\/\/www.alicat.com\/support\/fast-accurate-leak-testing-using-one-flow-controller\/\">leak testing<\/a> can require a rather complex setup. When the device is under test, in this case, the SUB is subjected to constant pressure within a closed system, any resulting flow is a direct measure of the leak rate. This type of test requires both stable pressure control at the SUB and accurate flow measurement to test for leakage.\n\n<iframe title=\"Alicat Mass Flow Controller: Demo - Leak Checking\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/89kpiIuYoOE?feature=oembed&rel=0\"  allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n\nLeaks are most easily detected and measured when the meter generates minimal <a href=\"https:\/\/www.alicat.com\/support\/what-is-pressure-drop\/\">pressure drop<\/a>. Because of this, Alicat recommends using a single <a href=\"https:\/\/www.alicat.com\/products\/gas-flow\/mass-flow-controller\/low-pressure-drop-mass-flow-controllers\/\">Whisper-Series mass flow controller<\/a>. This device has a full-scale pressure drop as low as 3.6 mbar (0.052 PSID) and a turned-down pressure drop as low as 0.018 mbar (.00026 PSID), allowing for precise and responsive control with minimal frictional resistance. It can be set to maintain a constant pressure at the SUB while providing accurate mass and volumetric flow readings in real-time. Configured this way, a Whisper-Series device functions as a simultaneous pressure controller and mass flow meter.\n\nThis method requires only one device, making it faster and easier to test single-use equipment for leaks. It is faster and more sensitive than a pressure decay test, and simpler and lower cost than a multi-device leak checking system.[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n","protected":false},"featured_media":46458,"parent":0,"template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"1920","content-type":"","_searchwp_excluded":""},"categories":[],"class_list":["post-38452","support","type-support","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Accurate and Simplified Pressure Decay Leak Testing for Single-Use Bioprocessing - Alicat Scientific<\/title>\n<meta name=\"description\" content=\"Alicat\u2019s low pressure drop Whisper-Series mass flow meter provides a simple means of leak testing for single-use bioprocessing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alicat.com\/de\/unterstutzung\/schnelle-flexible-dichtheitsprufung-fur-einweg-bioprozesse\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Accurate and Simplified Pressure Decay Leak Testing for Single-Use Bioprocessing\" \/>\n<meta property=\"og:description\" content=\"Alicat\u2019s low pressure drop Whisper-Series mass flow meter provides a simple means of leak testing for single-use bioprocessing.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alicat.com\/de\/unterstutzung\/schnelle-flexible-dichtheitsprufung-fur-einweg-bioprozesse\/\" \/>\n<meta property=\"og:site_name\" content=\"Alicat Scientific\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/alicatscientific\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-03T20:42:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.alicat.com\/wp-content\/uploads\/2026\/01\/featured-alicat.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\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=\"3\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/support\\\/fast-flexible-leak-testing-for-single-use-bioprocessing\\\/\",\"url\":\"https:\\\/\\\/www.alicat.com\\\/support\\\/fast-flexible-leak-testing-for-single-use-bioprocessing\\\/\",\"name\":\"Accurate and Simplified Pressure Decay Leak Testing for Single-Use Bioprocessing - 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