{"id":629,"date":"2022-07-25T10:52:38","date_gmt":"2022-07-25T05:22:38","guid":{"rendered":"https:\/\/wearablesdrop.com\/?p=629"},"modified":"2023-03-04T10:02:09","modified_gmt":"2023-03-04T04:32:09","slug":"how-spo2-sensor-works-in-smartwatch","status":"publish","type":"post","link":"https:\/\/wearablesdrop.com\/how-spo2-sensor-works-in-smartwatch\/","title":{"rendered":"How Does SpO2 Oxygen Sensor Work In Smartwatch: Is It Reliable?"},"content":{"rendered":"\n<p>We used to get only a Heart-Rate monitoring sensor in most <a href=\"https:\/\/wearablesdrop.com\/tag\/smartwatches\/\">smartwatches <\/a>but after the COVID-19, now whether it&#8217;s a budget smartwatch or premium, we&#8217;re also getting a SpO2 sensor.<\/p>\n\n\n\n<p>The biggest question is, <\/p>\n\n\n\n<p>Are SpO2 sensors on smartwatches reliable? how do they work compared to any Oximeter? <\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_61 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/wearablesdrop.com\/how-spo2-sensor-works-in-smartwatch\/#How_SpO2_Sensor_Works_in_Smartwatch\" title=\"How SpO2 Sensor Works in Smartwatch\">How SpO2 Sensor Works in Smartwatch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/wearablesdrop.com\/how-spo2-sensor-works-in-smartwatch\/#Is_SpO2_Sensor_Reliable_In_Smartwatch\" title=\"Is SpO2 Sensor Reliable In Smartwatch?\">Is SpO2 Sensor Reliable In Smartwatch?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/wearablesdrop.com\/how-spo2-sensor-works-in-smartwatch\/#What_is_SpO2_or_Blood_Oxygen\" title=\"What is SpO2 or Blood Oxygen\">What is SpO2 or Blood Oxygen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/wearablesdrop.com\/how-spo2-sensor-works-in-smartwatch\/#Verdict\" title=\"Verdict\">Verdict<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_SpO2_Sensor_Works_in_Smartwatch\"><\/span>How SpO2 Sensor Works in Smartwatch<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?resize=1024%2C576&#038;ssl=1\" alt=\"\" class=\"wp-image-631\" title=\"\" srcset=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?resize=600%2C337&amp;ssl=1 600w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?resize=150%2C84&amp;ssl=1 150w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image02.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><figcaption>Measuring Spo2 Using Smartwatch<\/figcaption><\/figure>\n\n\n\n<p>When you measure the SpO2 on a smartwatch, it projects LED lights into the skin to measure oxygen levels, the difference between injected light and reflected light is the final result of SpO2 in blood cells.<\/p>\n\n\n\n<p>The smartwatches use photoplethysmography (PPG) sensors to measure the SpO2  percentage as well as the Heart-Rate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_SpO2_Sensor_Reliable_In_Smartwatch\"><\/span>Is SpO2 Sensor Reliable In Smartwatch?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?resize=1024%2C576&#038;ssl=1\" alt=\"\" class=\"wp-image-635\" title=\"\" srcset=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?resize=600%2C337&amp;ssl=1 600w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?resize=150%2C84&amp;ssl=1 150w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/How-SPO2-Sesnor-works_Image01.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><figcaption>Measuring Spo2 Using Oximeter<\/figcaption><\/figure>\n\n\n\n<p>To answer that question, first, you need to know about Oximeter,<\/p>\n\n\n\n<p>When you place your finger in an oximeter, one end of the device emits light using a light source, which then passes through the finger and then hits the sensors at the other end.<\/p>\n\n\n\n<p>This sensor reads the light properties, wavelength, etc, and depending on the measurement calculates the SPO2 level.<\/p>\n\n\n\n<p>In simple words, No SpO2 Sensor in smartwatches are not reliable, still, in the end, it also depends on what kind of smartwatch you&#8217;re using, <\/p>\n\n\n\n<p>For example, measuring SpO2 on<a rel=\"noreferrer noopener\" href=\"https:\/\/amzn.to\/3zvKILo\" target=\"_blank\"> Apple Watch <\/a>or <a rel=\"noreferrer noopener\" href=\"https:\/\/amzn.to\/3Bj3gjh\" target=\"_blank\">Galaxy Watch<\/a> will be more reliable as they use good quality SpO2 sensors whereas using a SpO2 sensor in a Rs 5000 smartwatch won&#8217;t give you an accurate result.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_SpO2_or_Blood_Oxygen\"><\/span>What is SpO2 or Blood Oxygen<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?resize=1024%2C576&#038;ssl=1\" alt=\"\" class=\"wp-image-633\" title=\"\" srcset=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?resize=600%2C337&amp;ssl=1 600w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?resize=150%2C84&amp;ssl=1 150w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/Red-blood-cell.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><figcaption>Red Blood Cells<\/figcaption><\/figure>\n\n\n\n<p>The SpO2 or blood oxygen levels are the percentage of oxygen in the blood. Simply put, it measures how much oxygen your red blood cells carry.<\/p>\n\n\n\n<p>Also, if you&#8217;re having symptoms like headache, shortness of breath, coughing, sneezing, bluish color in skin or nails, and more.<\/p>\n\n\n\n<p>In this case, you better visit a nearby hospital because Lower blood oxygen levels can result in Hypoxemia.<\/p>\n\n\n\n<p>According to WHO, a patient with oxygen saturation of 94% or lower needs quick medical attention. And if less than 90%, it\u2019s a clinical emergency.<\/p>\n\n\n\n<p>So what I&#8217;m saying is, if your smartwatch is showing SpO2 levels of 90% and you don&#8217;t have any symptoms which I mention then there is a chance that, the smartwatch you&#8217;re using is unreliable, you better <a href=\"https:\/\/amzn.to\/3BniDqO\" target=\"_blank\" rel=\"noreferrer noopener\">get an oximeter.<\/a><\/p>\n\n\n\n<p>These days, oximeters are not that expensive, having only one oximeter at home will help all of your family members.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verdict\"><\/span>Verdict<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?resize=1024%2C576&#038;ssl=1\" alt=\"\" class=\"wp-image-637\" title=\"\" srcset=\"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?resize=600%2C337&amp;ssl=1 600w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?resize=150%2C84&amp;ssl=1 150w, https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch_Image01.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>When it comes to your health, you should not rely on smartwatches, they&#8217;re good but still, they&#8217;re not the best. <\/p>\n\n\n\n<p>I hope, this article was helpful but still, if you&#8217;re having any doubts or questions then do let me know in the comment box&#8230;<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 has-custom-font-size is-style-fill has-small-font-size\"><a class=\"wp-block-button__link has-white-color has-text-color has-background\" href=\"https:\/\/amzn.to\/3z1JTbT\" style=\"border-radius:5px;background-color:#5510f5ed\" target=\"_blank\" rel=\"noreferrer noopener\">BUY Oximeter<\/a><\/div>\n<\/div>\n\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id59_ad83db-0a{margin-bottom:30px;}.kb-row-layout-id59_ad83db-0a > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id59_ad83db-0a > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id59_ad83db-0a > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:24px;padding-bottom:24px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id59_ad83db-0a{border-top-left-radius:14px;border-top-right-radius:14px;border-bottom-right-radius:14px;border-bottom-left-radius:14px;overflow:hidden;isolation:isolate;border-top:2px solid var(--global-palette7, #EDF2F7);border-right:2px solid var(--global-palette7, #EDF2F7);border-bottom:2px solid var(--global-palette7, #EDF2F7);border-left:2px solid var(--global-palette7, #EDF2F7);}.kb-row-layout-id59_ad83db-0a > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id59_ad83db-0a > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id59_ad83db-0a{border-top:2px solid var(--global-palette7, #EDF2F7);border-right:2px solid var(--global-palette7, #EDF2F7);border-bottom:2px solid var(--global-palette7, #EDF2F7);border-left:2px solid var(--global-palette7, #EDF2F7);}}@media all and (max-width: 767px){.kb-row-layout-id59_ad83db-0a > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id59_ad83db-0a{border-top:2px solid var(--global-palette7, #EDF2F7);border-right:2px solid var(--global-palette7, #EDF2F7);border-bottom:2px solid var(--global-palette7, #EDF2F7);border-left:2px solid var(--global-palette7, #EDF2F7);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id59_ad83db-0a alignnone has-theme-palette8-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column59_00ddee-88 > .kt-inside-inner-col,.kadence-column59_00ddee-88 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column59_00ddee-88 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column59_00ddee-88{position:relative;}<\/style>\n<div class=\"wp-block-kadence-column kadence-column59_00ddee-88\"><div class=\"kt-inside-inner-col\">\n<p><em>To get up to date with tech, do follow us\u00a0at\u00a0<a href=\"https:\/\/mobiledrop.in\/\" target=\"_blank\" rel=\"noreferrer noopener\">MobileDrop<\/a>. <\/em>L<em>ove to read books, say hi to me at <a href=\"https:\/\/bookiestalk.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">bookiestalk.<\/a> Save money with us on <a href=\"https:\/\/t.me\/topbestinINDIA\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Telegram<\/a>&#8230;<\/em><\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<p><em>*images: <a rel=\"noreferrer noopener\" href=\"https:\/\/www.youtube.com\/watch?v=Ayz1bBkb8p0\" target=\"_blank\">Engineering Semester<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We used to get only a Heart-Rate monitoring sensor in most smartwatches but after the COVID-19, now whether it&#8217;s a budget smartwatch or premium, we&#8217;re also getting a SpO2 sensor. The biggest question is, Are SpO2 sensors on smartwatches reliable? how do they work compared to any Oximeter? How SpO2 Sensor Works in Smartwatch When&#8230;<\/p>\n","protected":false},"author":1,"featured_media":639,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[208],"tags":[212,211,213,210,242,11,209],"featured_image_src":"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch.jpg?fit=1200%2C675&ssl=1","author_info":{"display_name":"Rahul Makwana","author_link":"https:\/\/wearablesdrop.com\/author\/rahul\/"},"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/wearablesdrop.com\/wp-content\/uploads\/2022\/07\/how-spo2-sensor-works-in-smartwatch.jpg?fit=1200%2C675&ssl=1","_links":{"self":[{"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/posts\/629"}],"collection":[{"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/comments?post=629"}],"version-history":[{"count":9,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/posts\/629\/revisions"}],"predecessor-version":[{"id":649,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/posts\/629\/revisions\/649"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/media\/639"}],"wp:attachment":[{"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/media?parent=629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/categories?post=629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wearablesdrop.com\/wp-json\/wp\/v2\/tags?post=629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}