{"id":8497,"date":"2026-09-25T16:34:42","date_gmt":"2026-09-25T16:34:42","guid":{"rendered":"https:\/\/sso2.com\/?page_id=8497"},"modified":"2026-10-15T20:43:33","modified_gmt":"2026-10-15T20:43:33","slug":"oxygen-analysis-for-rebreather-diving-gas-preparation","status":"publish","type":"page","link":"https:\/\/sso2.com\/vi\/medical-gas-life-science-applications\/oxygen-analysis-for-rebreather-diving-gas-preparation\/","title":{"rendered":"Oxygen Analysis for Rebreather Diving Gas Preparation"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"8497\" class=\"elementor elementor-8497\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6365005 elementor-section-items-stretch elementor-section-height-min-height elementor-section-boxed elementor-section-height-default\" data-id=\"6365005\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-5562ac3\" data-id=\"5562ac3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-fe1b9b4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fe1b9b4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-84f2ea0\" data-id=\"84f2ea0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cc73290 elementor-widget__width-auto elementor-widget elementor-widget-heading\" data-id=\"cc73290\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/sso2.com\/vi\/\">Trang ch\u1ee7<\/a><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2095947 elementor-widget__width-initial elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"2095947\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-slash\" viewbox=\"0 0 640 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M594.53 508.63L6.18 53.9c-6.97-5.42-8.23-15.47-2.81-22.45L23.01 6.18C28.43-.8 38.49-2.06 45.47 3.37L633.82 458.1c6.97 5.42 8.23 15.47 2.81 22.45l-19.64 25.27c-5.42 6.98-15.48 8.23-22.46 2.81z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cfc47a7 elementor-widget__width-auto elementor-widget elementor-widget-heading\" data-id=\"cfc47a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\"><a href=\"#\">Oxygen Analysis for Rebreather Diving Gas Preparation<\/a><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-524a121 elementor-reverse-tablet elementor-reverse-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"524a121\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-1859b6d\" data-id=\"1859b6d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bedb2cd elementor-widget elementor-widget-heading\" data-id=\"bedb2cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Oxygen Analysis for Rebreather Diving Gas Preparation<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-bb32d5e\" data-id=\"bb32d5e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-068afe6 animated-fast elementor-invisible elementor-widget elementor-widget-image\" data-id=\"068afe6\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;,&quot;_animation_mobile&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"822\" height=\"494\" src=\"https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2026\/09\/Oxygen-Analysis-for-Rebreather-Diving-Gas-Preparation.webp?fit=822%2C494&amp;ssl=1\" class=\"attachment-full size-full wp-image-8554\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2026\/09\/Oxygen-Analysis-for-Rebreather-Diving-Gas-Preparation.webp?w=822&amp;ssl=1 822w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2026\/09\/Oxygen-Analysis-for-Rebreather-Diving-Gas-Preparation.webp?resize=300%2C180&amp;ssl=1 300w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2026\/09\/Oxygen-Analysis-for-Rebreather-Diving-Gas-Preparation.webp?resize=768%2C462&amp;ssl=1 768w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2026\/09\/Oxygen-Analysis-for-Rebreather-Diving-Gas-Preparation.webp?resize=18%2C12&amp;ssl=1 18w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2026\/09\/Oxygen-Analysis-for-Rebreather-Diving-Gas-Preparation.webp?resize=600%2C361&amp;ssl=1 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ef092ec elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ef092ec\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-11c4f4f\" data-id=\"11c4f4f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-06ed55f elementor-widget elementor-widget-heading\" data-id=\"06ed55f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Verifying Diluent &amp; Oxygen Supply Gas Before Rebreather Dives \u2014 OMD-21<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5340ad9 elementor-widget elementor-widget-text-editor\" data-id=\"5340ad9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"1 1 []\">Closed-circuit rebreather diving typically uses separate oxygen and diluent cylinders, while semi-closed rebreather configurations may use different gas supply arrangements. Verifying the oxygen concentration of each applicable supply cylinder before connecting it to the rebreather is an important part of pre-dive preparation.<\/p><p>Incorrect oxygen or diluent gas composition can create serious risks during a dive, including oxygen toxicity or hypoxia. Independent gas analysis helps divers confirm that their supply cylinders contain the intended breathing gases before assembling and preparing their equipment.<\/p><p>The OMD-21 portable oxygen analyzer provides percent-level oxygen measurements for verifying rebreather oxygen and diluent supply cylinders before connection to the rebreather system.<\/p><p><strong>Southland Sensing does not manufacture oxygen sensors for installation inside rebreathers.<\/strong> The OMD-21 is an external gas verification instrument and is not designed to replace the oxygen sensors or monitoring systems used within a rebreather&#8217;s breathing loop.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-03febe0 elementor-icon-list--layout-inline elementor-align-start elementor-widget-tablet__width-initial elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"03febe0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Oxygen Gas Verification<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Diluent &amp; O2 Supply Checks<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Pre-Dive Safety Checklist<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Portable Handheld Analysis<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-74753e4 e-flex e-con-boxed e-con e-parent\" data-id=\"74753e4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6f04380 elementor-widget elementor-widget-heading\" data-id=\"6f04380\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why Rebreather Gas Verification Matters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9a44a5b e-flex e-con-boxed e-con e-child\" data-id=\"9a44a5b\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-32a50df elementor-widget elementor-widget-text-editor\" data-id=\"32a50df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"1 1 []\">Rebreather diving requires careful verification of oxygen and diluent supply gases before connecting cylinders to the equipment. An incorrectly blended or mislabeled cylinder can introduce an unsuitable gas into the breathing system, creating risks of oxygen toxicity or hypoxia during the dive.<\/p><p>Although many closed-circuit rebreathers use internal oxygen sensors to monitor breathing loop oxygen partial pressure, these systems do not eliminate the need to independently verify the gases supplied to the rebreather.<\/p><p>Checking the actual oxygen concentration of each applicable supply cylinder, rather than relying solely on cylinder labels, is an important part of established rebreather pre-dive preparation procedures.<\/p><p>The OMD-21 supports this external cylinder verification process and is not intended for installation or oxygen monitoring within the rebreather breathing loop.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0a225c7 e-flex e-con-boxed e-con e-parent\" data-id=\"0a225c7\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b5ce185 elementor-widget elementor-widget-heading\" data-id=\"b5ce185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Where It's Used\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-00fbbd6 elementor-widget elementor-widget-text-editor\" data-id=\"00fbbd6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Diluent gas verification \u2014 confirming oxygen content of the diluent supply before assembly<\/li><li>Oxygen supply cylinder verification \u2014 checking the pure or enriched oxygen supply gas<\/li><li>Pre-dive unit build checklist \u2014 integrating gas verification into standard rebreather setup<\/li><li>Rebreather training and certification \u2014 teaching proper gas verification procedure<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4a69de8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4a69de8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0e598e8\" data-id=\"0e598e8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-04895fa elementor-widget elementor-widget-heading\" data-id=\"04895fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Recommended Analyzer<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-637524c e-flex e-con-boxed e-con e-parent\" data-id=\"637524c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-7c0d823 e-con-full e-flex e-con e-child\" data-id=\"7c0d823\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ac2d7e6 elementor-widget elementor-widget-image\" data-id=\"ac2d7e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/sso2.com\/vi\/portable-oxygen-analyzers\/omd-21-oxygen-analyzer\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"718\" src=\"https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2025\/02\/omd-21.png?fit=800%2C718&amp;ssl=1\" class=\"attachment-large size-large wp-image-3084\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2025\/02\/omd-21.png?w=1290&amp;ssl=1 1290w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2025\/02\/omd-21.png?resize=300%2C269&amp;ssl=1 300w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2025\/02\/omd-21.png?resize=1024%2C919&amp;ssl=1 1024w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2025\/02\/omd-21.png?resize=768%2C689&amp;ssl=1 768w, https:\/\/i0.wp.com\/sso2.com\/wp-content\/uploads\/2025\/02\/omd-21.png?resize=600%2C539&amp;ssl=1 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-92089a3 e-con-full e-flex e-con e-child\" data-id=\"92089a3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8ee50fe elementor-widget elementor-widget-heading\" data-id=\"8ee50fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/sso2.com\/vi\/portable-oxygen-analyzers\/omd-21-oxygen-analyzer\/\">OMD-21 M\u00e1y ph\u00e2n t\u00edch oxy c\u1ea7m tay di \u0111\u1ed9ng, CE<\/a><\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24eba4c elementor-widget elementor-widget-text-editor\" data-id=\"24eba4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-pm-slice=\"1 1 []\">The OMD-21 portable oxygen analyzer provides percent-level oxygen measurements for verifying rebreather diluent and oxygen supply cylinders before they are connected to the breathing system.<\/p><p>Its compact, battery-powered design, remote oxygen sensor, and flow diverter make it convenient to incorporate gas verification into routine rebreather preparation and pre-dive checks.<\/p><p>The analyzer must be properly calibrated and suitable for the oxygen concentration and balance gas being tested, including high-purity oxygen and helium-containing diluent mixtures where applicable.<\/p><p>The OMD-21 is intended for external cylinder gas verification only. It does not replace the oxygen sensors or monitoring systems installed within a rebreather.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91e1787 elementor-icon-list--layout-inline elementor-align-start elementor-widget-tablet__width-initial elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"91e1787\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-battery-full\" viewbox=\"0 0 640 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M544 160v64h32v64h-32v64H64V160h480m16-64H48c-26.51 0-48 21.49-48 48v224c0 26.51 21.49 48 48 48h512c26.51 0 48-21.49 48-48v-16h8c13.255 0 24-10.745 24-24V184c0-13.255-10.745-24-24-24h-8v-16c0-26.51-21.49-48-48-48zm-48 96H96v128h416V192z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Pin AAA<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-clock\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256,8C119,8,8,119,8,256S119,504,256,504,504,393,504,256,393,8,256,8Zm92.49,313h0l-20,25a16,16,0,0,1-22.49,2.5h0l-67-49.72a40,40,0,0,1-15-31.23V112a16,16,0,0,1,16-16h32a16,16,0,0,1,16,16V256l58,42.5A16,16,0,0,1,348.49,321Z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">C\u1ea3nh b\u00e1o c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-dice-d20\" viewbox=\"0 0 480 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M106.75 215.06L1.2 370.95c-3.08 5 .1 11.5 5.93 12.14l208.26 22.07-108.64-190.1zM7.41 315.43L82.7 193.08 6.06 147.1c-2.67-1.6-6.06.32-6.06 3.43v162.81c0 4.03 5.29 5.53 7.41 2.09zM18.25 423.6l194.4 87.66c5.3 2.45 11.35-1.43 11.35-7.26v-65.67l-203.55-22.3c-4.45-.5-6.23 5.59-2.2 7.57zm81.22-257.78L179.4 22.88c4.34-7.06-3.59-15.25-10.78-11.14L17.81 110.35c-2.47 1.62-2.39 5.26.13 6.78l81.53 48.69zM240 176h109.21L253.63 7.62C250.5 2.54 245.25 0 240 0s-10.5 2.54-13.63 7.62L130.79 176H240zm233.94-28.9l-76.64 45.99 75.29 122.35c2.11 3.44 7.41 1.94 7.41-2.1V150.53c0-3.11-3.39-5.03-6.06-3.43zm-93.41 18.72l81.53-48.7c2.53-1.52 2.6-5.16.13-6.78l-150.81-98.6c-7.19-4.11-15.12 4.08-10.78 11.14l79.93 142.94zm79.02 250.21L256 438.32v65.67c0 5.84 6.05 9.71 11.35 7.26l194.4-87.66c4.03-1.97 2.25-8.06-2.2-7.56zm-86.3-200.97l-108.63 190.1 208.26-22.07c5.83-.65 9.01-7.14 5.93-12.14L373.25 215.06zM240 208H139.57L240 383.75 340.43 208H240z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">0 - 100% Ph\u1ea1m vi \u0111o l\u01b0\u1eddng<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-times-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm0 448c-110.5 0-200-89.5-200-200S145.5 56 256 56s200 89.5 200 200-89.5 200-200 200zm101.8-262.2L295.6 256l62.2 62.2c4.7 4.7 4.7 12.3 0 17l-22.6 22.6c-4.7 4.7-12.3 4.7-17 0L256 295.6l-62.2 62.2c-4.7 4.7-12.3 4.7-17 0l-22.6-22.6c-4.7-4.7-4.7-12.3 0-17l62.2-62.2-62.2-62.2c-4.7-4.7-4.7-12.3 0-17l22.6-22.6c4.7-4.7 12.3-4.7 17 0l62.2 62.2 62.2-62.2c4.7-4.7 12.3-4.7 17 0l22.6 22.6c4.7 4.7 4.7 12.3 0 17z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">C\u1ea3m bi\u1ebfn t\u1eeb xa c\u00f3 b\u1ed9 chia d\u00f2ng ch\u1ea3y<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6003928 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6003928\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0ee3d9d\" data-id=\"0ee3d9d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-66ed3fb elementor-widget elementor-widget-heading\" data-id=\"66ed3fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a43ea9 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"4a43ea9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Range: 0 \u2013 100% O2 \u2014 covers both diluent and pure oxygen supply gases<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Resolution: 0.01% O2 \u2014 supports precise verification during unit build<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Power: 3-AAA batteries \u2014 convenient for use as part of a portable pre-dive kit<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Alarms: adjustable high\/low audible alarms to flag an incorrect supply gas<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Enclosure: rugged, portable design suited to repeated pre-dive checklist use<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a9612a6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a9612a6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-59358a3\" data-id=\"59358a3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c1680c9 elementor-widget elementor-widget-heading\" data-id=\"c1680c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c05185 elementor-widget elementor-widget-toggle\" data-id=\"4c05185\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"toggle.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-toggle\">\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-7971\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-7971\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><svg class=\"e-font-icon-svg e-fas-caret-right\" viewbox=\"0 0 192 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M0 384.662V127.338c0-17.818 21.543-26.741 34.142-14.142l128.662 128.662c7.81 7.81 7.81 20.474 0 28.284L34.142 398.804C21.543 411.404 0 402.48 0 384.662z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><svg class=\"elementor-toggle-icon-opened e-font-icon-svg e-fas-caret-up\" viewbox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M288.662 352H31.338c-17.818 0-26.741-21.543-14.142-34.142l128.662-128.662c7.81-7.81 20.474-7.81 28.284 0l128.662 128.662c12.6 12.599 3.676 34.142-14.142 34.142z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Why do rebreather divers need to verify both diluent and oxygen supply gases?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-7971\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-7971\"><p data-pm-slice=\"1 1 []\">Rebreather systems rely on correctly identified oxygen and diluent supplies to operate as intended. An incorrectly filled or mislabeled cylinder can introduce an unsuitable gas into the breathing system, potentially creating risks of oxygen toxicity or hypoxia.<\/p><p>Independently verifying the oxygen concentration of each applicable supply cylinder before connecting it to the rebreather helps identify gas blending errors and cylinder mix-ups.<\/p><p>The OMD-21 portable oxygen analyzer supports these external pre-dive cylinder checks. It does not measure oxygen levels inside the rebreather breathing loop or replace the rebreather&#8217;s internal oxygen sensors.<\/p><p>For helium-containing diluent mixtures, helium concentration must also be independently verified using appropriate equipment.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-7972\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-7972\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><svg class=\"e-font-icon-svg e-fas-caret-right\" viewbox=\"0 0 192 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M0 384.662V127.338c0-17.818 21.543-26.741 34.142-14.142l128.662 128.662c7.81 7.81 7.81 20.474 0 28.284L34.142 398.804C21.543 411.404 0 402.48 0 384.662z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><svg class=\"elementor-toggle-icon-opened e-font-icon-svg e-fas-caret-up\" viewbox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M288.662 352H31.338c-17.818 0-26.741-21.543-14.142-34.142l128.662-128.662c7.81-7.81 20.474-7.81 28.284 0l128.662 128.662c12.6 12.599 3.676 34.142-14.142 34.142z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">When in the rebreather assembly process should gas verification happen?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-7972\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-7972\"><p data-pm-slice=\"1 1 []\">Oxygen concentration should be verified after the supply cylinders have been filled or blended and before they are connected to the rebreather system.<\/p><p>Divers should independently analyze the applicable oxygen and diluent cylinders, confirm that the measured gas composition matches the intended mixture, and ensure each cylinder is correctly labeled.<\/p><p>Gas identification and verification should also be included in the rebreather manufacturer&#8217;s prescribed pre-dive procedures and the diver&#8217;s established checklist.<\/p><p>The OMD-21 is intended for external cylinder oxygen verification and does not replace the internal oxygen monitoring or pre-dive functional checks required for the rebreather itself.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-7973\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-7973\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><svg class=\"e-font-icon-svg e-fas-caret-right\" viewbox=\"0 0 192 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M0 384.662V127.338c0-17.818 21.543-26.741 34.142-14.142l128.662 128.662c7.81 7.81 7.81 20.474 0 28.284L34.142 398.804C21.543 411.404 0 402.48 0 384.662z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><svg class=\"elementor-toggle-icon-opened e-font-icon-svg e-fas-caret-up\" viewbox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M288.662 352H31.338c-17.818 0-26.741-21.543-14.142-34.142l128.662-128.662c7.81-7.81 20.474-7.81 28.284 0l128.662 128.662c12.6 12.599 3.676 34.142-14.142 34.142z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Is the OMD-21 suitable for both closed-circuit and semi-closed rebreather setups?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-7973\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-7973\"><p data-pm-slice=\"1 1 []\">Yes. The OMD-21 portable oxygen analyzer can be used to verify oxygen concentration in compatible breathing gas supply cylinders used with closed-circuit and semi-closed rebreathers.<\/p><p>Although these rebreather systems operate differently and may use different gas supply arrangements, both require appropriate verification of their breathing gases before diving.<\/p><p>The OMD-21 is intended for external cylinder analysis before connection to the rebreather. It is not designed for installation inside a rebreather or for monitoring oxygen partial pressure within the breathing loop.<\/p><p>Analyzer compatibility must be confirmed for the specific gas composition, particularly high-purity oxygen and helium-containing mixtures.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-5a7a496 e-con-full e-flex e-con e-parent\" data-id=\"5a7a496\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-7b83dc4 e-flex e-con-boxed e-con e-child\" data-id=\"7b83dc4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6412ae0 e-con-full e-flex e-con e-child\" data-id=\"6412ae0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-cb38870 e-con-full e-flex e-con e-child\" data-id=\"cb38870\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e8096f elementor-widget elementor-widget-heading\" data-id=\"5e8096f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">NEED HELP SPECIFYING AN ANALYZER FOR YOUR OPERATION?\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0e299fb elementor-widget elementor-widget-text-editor\" data-id=\"0e299fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Our application engineers can help confirm the right model for your process conditions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32cc525 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"32cc525\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/sso2.com\/vi\/contact-us\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Y\u00eau c\u1ea7u b\u00e1o gi\u00e1 \u2192<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6201263 e-flex e-con-boxed e-con e-parent\" data-id=\"6201263\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-8b3bc75 e-flex e-con-boxed e-con e-child\" data-id=\"8b3bc75\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-419f4c4 elementor-widget elementor-widget-text-editor\" data-id=\"419f4c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"#\">\u2190 <\/a><a href=\"#\">Back to Medical Gas &amp; Life Science Applications<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0f1b9bb elementor-widget elementor-widget-text-editor\" data-id=\"0f1b9bb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"#\">All Application Notes &rarr;<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Home Verifying Diluent &amp; Oxygen Supply Gas Before Rebreather Dives \u2014 OMD-21 Closed-circuit rebreather diving typically uses separate oxygen and diluent cylinders, while semi-closed rebreather configurations may use different gas supply arrangements. Verifying the oxygen concentration of each applicable supply cylinder before connecting it to the rebreather is an important part of pre-dive preparation. Incorrect [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"parent":5737,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-8497","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Oxygen Analysis for Rebreather Diving Gas Prep | OMD-21<\/title>\n<meta name=\"description\" content=\"Verify diluent &amp; oxygen supply gas during rebreather assembly with the OMD-21 handheld analyzer.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sso2.com\/vi\/medical-gas-life-science-applications\/oxygen-analysis-for-rebreather-diving-gas-preparation\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oxygen Analysis for Rebreather Diving Gas Preparation\" \/>\n<meta property=\"og:description\" content=\"Verify diluent &amp; 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