{"id":6227,"date":"2026-01-14T09:00:00","date_gmt":"2026-01-14T15:00:00","guid":{"rendered":"https:\/\/www.oxidationtech.com\/blog\/?p=6227"},"modified":"2025-12-09T11:19:59","modified_gmt":"2025-12-09T17:19:59","slug":"hmos-sensors-explained","status":"publish","type":"post","link":"https:\/\/www.oxidationtech.com\/blog\/hmos-sensors-explained\/","title":{"rendered":"HMOS Sensors Explained"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">A Reliable, Cost-Effective Solution for Accurate Gas Monitoring<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019re looking for dependable gas detection without the complexity or cost of high-end analytical systems, <a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS sensors<\/a> are one of the smartest choices available today. Built on proven Heated Metal Oxide Semiconductor technology, these sensors deliver fast, accurate, and long-lasting performance\u2014making them ideal for a wide range of monitoring and safety applications.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\">Why Customers Choose <a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS Sensors<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exceptional durability<\/strong><br><a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors are designed to thrive in real-world conditions. With no fragile parts or consumables, they offer long service life and minimal maintenance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick, responsive performance<\/strong><br>When conditions change, <a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors react in seconds, providing near-instant data you can trust. This makes them perfect for facilities where real-time awareness matters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Outstanding sensitivity at low levels<\/strong><br>Even trace gas concentrations can be detected reliably, helping you maintain compliance, protect equipment, and ensure a healthier environment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Confidence in challenging environments<\/strong><br>Their heated sensing element stays stable across humidity swings, temperature fluctuations, and industrial conditions where other sensors struggle.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\">Ideal for a Wide Range of Applications<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors are a great fit for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Continuous indoor or ambient air monitoring<\/li>\n\n\n\n<li>Industrial and equipment rooms<\/li>\n\n\n\n<li>Safety and alarm systems<\/li>\n\n\n\n<li>Long-term monitoring programs<\/li>\n\n\n\n<li>Cost-conscious installations where reliability still matters<\/li>\n\n\n\n<li>Environments with variable temperature or humidity<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you\u2019re monitoring a single room or a large facility, <a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>technology provides performance you can count on.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\">A Smart <a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-principles-compared.html\">Alternative to Complex Analyzers<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you don\u2019t need a laboratory-grade instrument\u2014but still want accuracy, responsiveness, and dependable results\u2014<a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors hit the sweet spot. They offer excellent performance without the high costs, consumables, or upkeep of advanced systems.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading has-text-align-center\">How it Works<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/www.oxidationtech.com\/media\/catalog\/product\/cache\/363b735b2dff33cda0b9ad53a203ef45\/o\/z\/ozone_sensor_backside_3.png\" alt=\"aeroqual ozone sensor low range\" style=\"width:288px;height:auto\" title=\"aeroqual ozone sensor low range\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In heated metal oxide sensors a metal substrate is heated which allows it to become very sensitive to ozone gas. An electrical current passes through the metal substrate. The resistance of the current changes according to the mount of gas present. The sensor outputs the resistance in ppm or ppb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are several kinds of <a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors on the market. Different metals and temperature management can have a significant impact on the overall performance of the sensor. Aeroqual\u2019s proprietary technology is branded GSS (gas sensitive semiconductor) to distinguish it from other HMOS available.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors detect ozone based on changes in the electrical resistance of a heated semiconductor metal oxide surface when it interacts with ozone and other oxidizing gases.<\/p>\n\n\n\n<h4 class=\"wp-block-heading has-text-align-center has-white-color has-ast-global-color-0-background-color has-text-color has-background has-link-color has-medium-font-size wp-elements-3f7fe4ce9bcb8a9055ce4d4181e0b80b\" style=\"text-transform:capitalize\"><a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-principles-compared.html\">Compare O3 Sensor Technologies<\/a><\/h4>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;&nbsp;<a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-principles-compared.html#answer1\">-UV Absorption Ozone Analyzer<\/a><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp; &nbsp; &nbsp;<a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-principles-compared.html#answer2\">-Electrochemical Ozone Sensor<\/a><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp; &nbsp; &nbsp;&#8211;<a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-principles-compared.html#answer3\">Heated Metal Oxide Ozone (HMOS) Sensor<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image is-resized\"><a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\"><img decoding=\"async\" src=\"https:\/\/www.oxidationtech.com\/downloads\/Images\/Heated_Metal_Oxide_Ozone_Sensor.png\" alt=\"\" style=\"aspect-ratio:0.8435968200354245;width:498px;height:auto\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-medium is-resized\"><a href=\"https:\/\/www.gas-sensing.com\/\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"54\" src=\"https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2025\/12\/logo-768x139-1-300x54.png\" alt=\"Gas Sensing Logo\" class=\"wp-image-6230\" style=\"aspect-ratio:4.688012582855859;object-fit:contain;width:292px;height:auto\" srcset=\"https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2025\/12\/logo-768x139-1-300x54.png 300w, https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2025\/12\/logo-768x139-1.png 768w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong><a href=\"https:\/\/www.gas-sensing.com\/\">Gas Sensing<\/a><\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">We offer additional gas detection products in partnership with our subsidiary,\u00a0<a href=\"https:\/\/www.gas-sensing.com\/\">Gas Sensing.<\/a> Visit their website <a href=\"https:\/\/www.gas-sensing.com\/\">HERE.<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">The Bottom Line: Dependable Performance, Great Value<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.oxidationtech.com\/ozone\/ozone-system-design\/ozone-measurement-using-hmos-sensors.html\">HMOS <\/a>sensors deliver a powerful combination of accuracy, durability, and affordability. If you\u2019re searching for a gas monitoring solution that performs reliably day after day, HMOS technology is a proven choice trusted across industries.<\/p>\n\n\n<div class=\"aligncenter wp-block-site-logo\"><a href=\"https:\/\/www.oxidationtech.com\/blog\/\" class=\"custom-logo-link\" rel=\"home\"><img loading=\"lazy\" decoding=\"async\" width=\"419\" height=\"89\" src=\"https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2018\/11\/oxidationtech-logo-330x70.png\" class=\"custom-logo\" alt=\"oxidationtech-logo\" srcset=\"https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2018\/11\/oxidationtech-logo.png 1125w, https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2018\/11\/oxidationtech-logo-300x64.png 300w, https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2018\/11\/oxidationtech-logo-1024x218.png 1024w, https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2018\/11\/oxidationtech-logo-768x164.png 768w, https:\/\/www.oxidationtech.com\/blog\/wp-content\/uploads\/2018\/11\/oxidationtech-logo-330x70.png 330w\" sizes=\"auto, (max-width: 419px) 100vw, 419px\" \/><\/a><\/div>\n\n\n<h3 class=\"wp-block-heading has-text-align-left\">General <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">Calibration <\/a>Information<\/h3>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\">All Gas Sensors will require periodic <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">calibration <\/a>to ensure your gas measurements are accurate and correct.\u00a0 Different gasses, and sensor manufacturers will have differing requirements and methods for <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">calibration<\/a>.\u00a0 This page will serve to provide general <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">calibration <\/a>information and links to specific <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">calibration <\/a>procedures from the sensor manufacturers we represent.<\/p>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\">Should you have any questions about sensor <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">calibration<\/a>, or would like us to help you with your <a href=\"https:\/\/www.oxidationtech.com\/services\/ozone-calibration.html\">calibrations\u00a0<\/a>please <a href=\"https:\/\/www.oxidationtech.com\/contact\/\">contact us.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Reliable, Cost-Effective Solution for Accurate Gas Monitoring If you\u2019re looking for dependable gas detection without the complexity or cost of high-end analytical systems, HMOS [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":6231,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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