{"id":7514,"date":"2025-06-18T10:46:41","date_gmt":"2025-06-18T07:46:41","guid":{"rendered":"https:\/\/www.ban.gr\/what-is-emissivity\/"},"modified":"2025-06-18T16:30:53","modified_gmt":"2025-06-18T13:30:53","slug":"what-is-emissivity","status":"publish","type":"post","link":"https:\/\/www.ban.gr\/en\/what-is-emissivity\/","title":{"rendered":"What is Emissivity?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7514\" class=\"elementor elementor-7514 elementor-7259\">\n\t\t\t\t<div class=\"wd-negative-gap elementor-element elementor-element-5646030 e-flex e-con-boxed e-con e-parent\" data-id=\"5646030\" 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-1bd8c58 elementor-widget elementor-widget-heading\" data-id=\"1bd8c58\" 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<h4 class=\"elementor-heading-title elementor-size-default\">Emissivity is the ability of an object to emit or absorb energy.<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c10688 color-scheme-inherit text-left elementor-widget elementor-widget-text-editor\" data-id=\"0c10688\" 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><img decoding=\"async\" class=\"alignleft size-full wp-image-7263\" src=\"https:\/\/www.ban.gr\/wp-content\/uploads\/2025\/06\/emissivity_pans.jpg\" alt=\"\" width=\"300\" height=\"131\" srcset=\"https:\/\/www.ban.gr\/wp-content\/uploads\/2025\/06\/emissivity_pans.jpg 300w, https:\/\/www.ban.gr\/wp-content\/uploads\/2025\/06\/emissivity_pans-150x66.jpg 150w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><span style=\"color: #000000;\">Perfect emitters have an emissivity of 1, emitting 100% of incident energy.<\/span><br \/>An object with an emissivity of 0.8 will absorb 80% and reflect 20% of the incident energy. Emissivity may vary with temperature and spectral response (wavelength). Handheld infrared thermometers will have difficulty taking accurate temperature measurements of shiny, metal surfaces unless they can adjust for emissivity.<\/p><p>Generally, the closer a material\u2019s emissivity rating is to 1.00, the more that material tends to absorb reflected or ambient infrared energy and emit only its own infrared radiation. Most organic materials, including the by products of plants and animals, have an emissivity rating of 0.95. These are ideal surfaces for accurate temperature readings.<\/p><p>Substances with very low emissivity ratings, like highly polished metals, tend to be very reflective of ambient infrared energy and less effective at emitting their own electromagnetic waves. If you were to point an infrared thermometer with fixed emissivity at the side of a stainless steel pot filled with boiling water, for example, you might get a reading closer to 38\u00b0C than 100\u00b0C. That\u2019s because the shiny metal is better at reflecting the ambient radiation of the room than it is at emitting its own infrared radiation.<\/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<div class=\"wd-negative-gap elementor-element elementor-element-41a47e1 e-flex e-con-boxed e-con e-parent\" data-id=\"41a47e1\" 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-b01b72b elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"b01b72b\" 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<a href=\"\/wp-content\/uploads\/2025\/06\/emissivity_table.pdf\">\n\n\t\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-arrow-circle-right\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8c137 0 248 111 248 248S393 504 256 504 8 393 8 256 119 8 256 8zm-28.9 143.6l75.5 72.4H120c-13.3 0-24 10.7-24 24v16c0 13.3 10.7 24 24 24h182.6l-75.5 72.4c-9.7 9.3-9.9 24.8-.4 34.3l11 10.9c9.4 9.4 24.6 9.4 33.9 0L404.3 273c9.4-9.4 9.4-24.6 0-33.9L271.6 106.3c-9.4-9.4-24.6-9.4-33.9 0l-11 10.9c-9.5 9.6-9.3 25.1.4 34.4z\"><\/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\">Emmisivity Table<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\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 class=\"elementor-element elementor-element-126b892 elementor-widget elementor-widget-wd_button\" data-id=\"126b892\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wd_button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"wd-button-wrapper text-left\" >\n\t\t\t<a class=\"btn btn-style-bordered btn-shape-rectangle btn-size-default btn-color-primary btn-icon-pos-right\"  href=\"\/wp-content\/uploads\/2025\/06\/emissivity_table.pdf\">\n\t\t\t\t<span class=\"wd-btn-text\" data-elementor-setting-key=\"text\">\n\t\t\t\t\tDOWNLOAD\t\t\t\t<\/span>\n\n\t\t\t\t\t\t\t<\/a>\n\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\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Emissivity is the ability of an object to emit or absorb energy.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[599],"tags":[606],"class_list":["post-7514","post","type-post","status-publish","format-standard","hentry","category-infra-red-thermometers-en","tag-infra-red-thermometers-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/posts\/7514","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/comments?post=7514"}],"version-history":[{"count":4,"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/posts\/7514\/revisions"}],"predecessor-version":[{"id":7518,"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/posts\/7514\/revisions\/7518"}],"wp:attachment":[{"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/media?parent=7514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/categories?post=7514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ban.gr\/en\/wp-json\/wp\/v2\/tags?post=7514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}