{"id":2997,"date":"2018-06-27T22:35:50","date_gmt":"2018-06-28T05:35:50","guid":{"rendered":""},"modified":"2026-07-30T14:43:38","modified_gmt":"2026-07-30T21:43:38","slug":"2997","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/2997","title":{"rendered":"When does the Optical DO Probe cap need to be replaced?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Testing testing<\/p>\n<p class=\"wp-block-paragraph\">All optical dissolved oxygen probes work on the same principle and all must have the sensing cap containing the luminophore replaced periodically due to a event known as photo-bleaching. If your Optical DO sensor is reading zero, do not replace the cap. See <a href=\"\/til\/27042\/\">Why is my Go Direct Dissolved Oxygen Probe reading zero?<\/a> first.<\/p>\n<p class=\"wp-block-paragraph\">The Optical DO Probe and Go Direct Optical DO cap is warranted to be free from defects for a period of twenty four (24) months from the date of purchase; it is possible that you may get somewhat longer use than the warranty period. If you start to notice a reduced or slow response, it is probably time to replace the cap.<\/p>\n<p class=\"wp-block-paragraph\">RELATED VERNIER PRODUCTS<br \/> <a href=\"\/product\/optical-do-probe-replacement-cap\/\">Optical DO Probe Replacement Cap<\/a> (<nobr>ODO-CAP<\/nobr>)<br \/><a href=\"\/product\/go-direct-optical-dissolved-oxygen-replacement-cap\/\">Go Direct<sup>&reg;<\/sup> Optical Dissolved Oxygen Replacement Cap<\/a> (<nobr>GDX-ODO-CAP<\/nobr>)<\/p>","protected":false},"excerpt":{"rendered":"<p>Testing testing All optical dissolved oxygen probes work on the same principle and all must have the sensing cap containing the luminophore replaced periodically due&#8230;<\/p>\n","protected":false},"author":41204,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[5056,1798,5055],"class_list":["post-2997","post","type-post","status-publish","format-standard","hentry","tag-membrane","tag-odo-bta","tag-odo-cap"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/41204"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=2997"}],"version-history":[{"count":3,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2997\/revisions"}],"predecessor-version":[{"id":27062,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2997\/revisions\/27062"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=2997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=2997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=2997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}