{"id":100086,"date":"2026-02-15T20:17:27","date_gmt":"2026-02-15T20:17:27","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100086"},"modified":"2026-02-15T20:17:27","modified_gmt":"2026-02-15T20:17:27","slug":"ex-marking-decoder","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/bn\/calculators\/ex-marking-decoder\/","title":{"rendered":"Ex Marking Decoder | IEC 60079 | ATEX Explosion Protection"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Ex Marking Decoder\",\"description\":\"Decode Ex markings per IEC 60079 \/ ATEX for hazardous area equipment.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/ex-marking-decoder\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What does Ex d IIB T4 mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Ex = explosion protected. d = flameproof enclosure (IEC 60079-1). IIB = Gas Group IIB (e.g. ethylene). T4 = Temperature Class T4 (max surface temp 135\u00b0C). This equipment is suitable for Zone 1 and Zone 2 hazardous areas.\"}},\n{\"@type\":\"Question\",\"name\":\"What are the main Ex protection types?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Common types: d = flameproof, e = increased safety, i = intrinsic safety (ia\/ib\/ic), p = pressurized, n = non-sparking, m = encapsulation, o = oil immersion, q = powder filling, t = protection by enclosure (dust).\"}},\n{\"@type\":\"Question\",\"name\":\"What are gas groups I, IIA, IIB, IIC?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Group I = Mining (methane). Group IIA = Propane, acetone, etc. Group IIB = Ethylene, hydrogen sulfide. Group IIC = Hydrogen, acetylene, carbon disulfide. IIC is the most stringent \u2014 equipment rated IIC can be used in IIA and IIB.\"}},\n{\"@type\":\"Question\",\"name\":\"What are temperature classes T1 to T6?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Temperature classes define the max surface temperature: T1=450\u00b0C, T2=300\u00b0C, T3=200\u00b0C, T4=135\u00b0C, T5=100\u00b0C, T6=85\u00b0C. The class must be lower than the auto-ignition temperature of the gas present.\"}},\n{\"@type\":\"Question\",\"name\":\"What is Equipment Protection Level (EPL)?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"EPL indicates the level of protection: Ga\/Da = very high (Zone 0\/20), Gb\/Db = high (Zone 1\/21), Gc\/Dc = enhanced (Zone 2\/22). 'G' is for gas, 'D' is for dust. EPL was introduced in IEC 60079-0 Edition 6.\"}}\n]}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Ex Marking Decoder\",\"item\":\"https:\/\/vibromera.eu\/calculators\/ex-marking-decoder\/\"}]}<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>\n:root{--vc-bg:#f4f1ec;--vc-surface:#fff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-red:#b91c1c;--vc-red-light:#fef2f2;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,.06),0 4px 12px rgba(26,26,26,.04);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono','Consolas',monospace;--vc-display:'Fraunces',Georgia,serif}\n.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 40px;-webkit-font-smoothing:antialiased}.vc-calculator *,.vc-calculator *::before,.vc-calculator *::after{box-sizing:border-box}\n.vc-header{text-align:center;padding:48px 24px 40px;position:relative}.vc-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--vc-accent);border-radius:2px}.vc-header-eyebrow{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--vc-accent);margin:0 0 12px}.vc-header-title{font-family:var(--vc-display);font-size:clamp(24px,4vw,36px);font-weight:800;line-height:1.15;color:var(--vc-ink);margin:0 0 16px;letter-spacing:-.02em}.vc-header-subtitle{font-size:15px;color:var(--vc-ink-secondary);margin:0 auto 20px;max-width:600px}\n.vc-badges{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}.vc-badge{font-family:var(--vc-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;background:var(--vc-surface);border:1px solid var(--vc-border);color:var(--vc-ink-secondary)}\n.vc-card{background:var(--vc-surface);border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);box-shadow:var(--vc-shadow);overflow:hidden;margin-top:32px}\n.vc-form{padding:24px}.vc-form-grid{display:grid;grid-template-columns:1fr;gap:18px}.vc-field{display:flex;flex-direction:column}\n.vc-label{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--vc-ink-secondary);margin-bottom:6px}.vc-label-hint{font-weight:400;text-transform:none;letter-spacing:0;color:var(--vc-ink-muted);font-size:11px}\n.vc-input{width:100%;padding:10px 12px;border:1.5px solid var(--vc-border);border-radius:6px;font-family:var(--vc-mono);font-size:20px;color:var(--vc-ink);background:var(--vc-surface);transition:border-color .15s,box-shadow .15s;text-align:center;letter-spacing:.08em}.vc-input:focus{outline:none;border-color:var(--vc-accent);box-shadow:0 0 0 3px rgba(200,90,42,.12)}\n.vc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--vc-border-light)}.vc-presets-label{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);width:100%;margin-bottom:2px}.vc-preset-btn{padding:5px 12px;font-family:var(--vc-font);font-size:12px;font-weight:500;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-preset-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-results{border-top:1px solid var(--vc-border-light);background:var(--vc-surface-alt);padding:0;max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(.4,0,.2,1),padding .3s}.vc-results.vc-visible{max-height:5000px;padding:24px}\n.vc-results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.vc-results-title{font-family:var(--vc-display);font-size:20px;font-weight:700;color:var(--vc-ink);margin:0}\n.vc-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:500;color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-copy-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}.vc-copy-btn.vc-copied{background:var(--vc-green-light);border-color:var(--vc-green);color:var(--vc-green)}\n.vc-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}@media(max-width:500px){.vc-result-grid{grid-template-columns:1fr}}\n.vc-rcard{background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;transition:transform .2s}.vc-rcard:hover{transform:translateY(-1px)}.vc-rcard-primary{border-color:var(--vc-accent);border-width:2px;background:linear-gradient(135deg,#fdf6f2,var(--vc-surface));grid-column:1\/-1}\n.vc-rcard-label{font-family:var(--vc-mono);font-size:10px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:4px}.vc-rcard-value{font-family:var(--vc-mono);font-size:20px;font-weight:600;color:var(--vc-ink);line-height:1.2}.vc-rcard-primary .vc-rcard-value{font-size:26px;color:var(--vc-accent)}.vc-rcard-unit{font-size:14px;font-weight:400;color:var(--vc-ink-secondary)}.vc-rcard-desc{font-size:13px;color:var(--vc-ink-secondary);margin-top:6px;line-height:1.5}\n.vc-section{margin-top:24px;border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);background:var(--vc-surface);box-shadow:var(--vc-shadow);overflow:hidden}.vc-section-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border:none;background:transparent;cursor:pointer;font-family:var(--vc-font);text-align:left;transition:background .15s}.vc-section-toggle:hover{background:var(--vc-surface-alt)}.vc-section-toggle-text{display:flex;align-items:center;gap:10px}.vc-section-icon{font-size:20px;line-height:1}.vc-section-title{font-family:var(--vc-display);font-size:18px;font-weight:700;color:var(--vc-ink);margin:0}.vc-section-chevron{width:20px;height:20px;color:var(--vc-ink-muted);transition:transform .3s;flex-shrink:0}.vc-section.vc-open .vc-section-chevron{transform:rotate(180deg)}.vc-section-body{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1)}.vc-section.vc-open .vc-section-body{max-height:20000px}.vc-section-inner{padding:0 24px 24px;border-top:1px solid var(--vc-border-light)}\n.vc-theory h3{font-family:var(--vc-display);font-size:17px;font-weight:700;color:var(--vc-ink);margin:28px 0 10px}.vc-theory h3:first-child{margin-top:20px}.vc-theory p{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 10px}\n.vc-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13px}.vc-table th,.vc-table td{padding:10px 12px;border:1px solid var(--vc-border-light);text-align:left}.vc-table th{background:var(--vc-surface-alt);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--vc-ink-secondary)}.vc-table tr:nth-child(even){background:var(--vc-surface-alt)}@media(max-width:600px){.vc-table{font-size:12px}.vc-table th,.vc-table td{padding:8px}}\n.vc-formula-box{background:var(--vc-surface-alt);border:2px solid var(--vc-border);border-radius:6px;padding:14px 20px;font-family:var(--vc-mono);font-size:16px;font-weight:500;text-align:center;margin:14px 0;color:var(--vc-ink);overflow-x:auto}\n.vc-faq-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}.vc-faq-item{border:1px solid var(--vc-border-light);border-radius:6px;overflow:hidden}.vc-faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:none;background:var(--vc-surface-alt);cursor:pointer;font-family:var(--vc-font);font-size:15px;font-weight:600;color:var(--vc-ink);text-align:left;transition:background .15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-faq-a-inner ul{margin:4px 0 8px 16px;padding:0}.vc-faq-a-inner li{margin-bottom:3px}\n.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\n.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-ex-decoder\">\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Ex Marking Decoder<\/h1>\n    <p class=\"vc-header-subtitle\">Enter any IEC 60079 \/ ATEX Ex marking string to decode protection type, gas group, temperature class, EPL, and zone suitability.<\/p>\n    <div class=\"vc-badges\"><span class=\"vc-badge\">IEC 60079<\/span><span class=\"vc-badge\">ATEX<\/span><span class=\"vc-badge\">Zone 0\/1\/2<\/span><\/div>\n<\/header>\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-marking\">Ex Marking String <span class=\"vc-label-hint\">(e.g. Ex d IIB T4 Gb)<\/span><\/label>\n                <input class=\"vc-input\" type=\"text\" id=\"vc-marking\" placeholder=\"Ex d IIB T4 Gb\" value=\"Ex d IIB T4 Gb\">\n            <\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Common markings<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"Ex d IIB T4 Gb\">Ex d IIB T4 Gb<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"Ex ia IIC T6 Ga\">Ex ia IIC T6 Ga<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"Ex e IIC T4 Gb\">Ex e IIC T4 Gb<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"Ex p IIB T3 Gb\">Ex p IIB T3 Gb<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"Ex nA IIC T4 Gc\">Ex nA IIC T4 Gc<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-v=\"Ex tb IIIC T80\u00b0C Db\">Ex tb IIIC T80\u00b0C Db<\/button>\n        <\/div>\n    <\/form>\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Decoded Marking<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button><\/div>\n        <div class=\"vc-result-grid\" id=\"vc-r-grid\"><\/div>\n    <\/div>\n<\/div>\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Protection Types &amp; Reference<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Protection Types<\/h3>\n        <table class=\"vc-table\"><thead><tr><th>Code<\/th><th>Method<\/th><th>IEC Standard<\/th><th>Typical Zone<\/th><\/tr><\/thead><tbody>\n            <tr><td>d<\/td><td>Flameproof enclosure<\/td><td>IEC 60079-1<\/td><td>Zone 1, 2<\/td><\/tr>\n            <tr><td>e<\/td><td>Increased safety<\/td><td>IEC 60079-7<\/td><td>Zone 1, 2<\/td><\/tr>\n            <tr><td>ia<\/td><td>Intrinsic safety (level a)<\/td><td>IEC 60079-11<\/td><td>Zone 0, 1, 2<\/td><\/tr>\n            <tr><td>ib<\/td><td>Intrinsic safety (level b)<\/td><td>IEC 60079-11<\/td><td>Zone 1, 2<\/td><\/tr>\n            <tr><td>ic<\/td><td>Intrinsic safety (level c)<\/td><td>IEC 60079-11<\/td><td>Zone 2<\/td><\/tr>\n            <tr><td>p\/px\/py\/pz<\/td><td>Pressurized enclosure<\/td><td>IEC 60079-2<\/td><td>Zone 1, 2<\/td><\/tr>\n            <tr><td>m\/ma\/mb<\/td><td>Encapsulation<\/td><td>IEC 60079-18<\/td><td>Zone 0, 1, 2<\/td><\/tr>\n            <tr><td>nA\/nC\/nR<\/td><td>Non-sparking \/ Type n<\/td><td>IEC 60079-15<\/td><td>Zone 2<\/td><\/tr>\n            <tr><td>o<\/td><td>Oil immersion<\/td><td>IEC 60079-6<\/td><td>Zone 1, 2<\/td><\/tr>\n            <tr><td>q<\/td><td>Powder filling<\/td><td>IEC 60079-5<\/td><td>Zone 1, 2<\/td><\/tr>\n            <tr><td>t\/ta\/tb\/tc<\/td><td>Protection by enclosure (dust)<\/td><td>IEC 60079-31<\/td><td>Zone 20\/21\/22<\/td><\/tr>\n        <\/tbody><\/table>\n        <h3>Temperature Classes<\/h3>\n        <table class=\"vc-table\"><thead><tr><th>Class<\/th><th>Max Surface Temp (\u00b0C)<\/th><th>Typical Gases<\/th><\/tr><\/thead><tbody>\n            <tr><td>T1<\/td><td>450<\/td><td>Hydrogen, methane, propane<\/td><\/tr>\n            <tr><td>T2<\/td><td>300<\/td><td>Ethanol, butane, acetone<\/td><\/tr>\n            <tr><td>T3<\/td><td>200<\/td><td>Gasoline, hydrogen sulfide, diesel<\/td><\/tr>\n            <tr><td>T4<\/td><td>135<\/td><td>Acetaldehyde, diethyl ether<\/td><\/tr>\n            <tr><td>T5<\/td><td>100<\/td><td>\u2014<\/td><\/tr>\n            <tr><td>T6<\/td><td>85<\/td><td>Carbon disulfide<\/td><\/tr>\n        <\/tbody><\/table>\n    <\/div><\/div>\n<\/div>\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\">\n        <a class=\"vc-related-link\" href=\"\/calculators\/ip-rating-decoder\/\">IP Rating Decoder<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/risk-assessment-matrix\/\">Risk Assessment Matrix<\/a>\n    <\/div><\/div><\/div>\n<\/div>\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Vibration analysis instruments suitable for hazardous areas. Professional field balancing in Ex zones.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n<footer class=\"vc-footer\"><p>&copy; 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p><p style=\"font-size:12px;margin-top:4px;\">Based on IEC 60079 \/ ATEX 2014\/34\/EU. Last updated: February 2025<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n<\/div>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n'use strict';\nfunction $(id){return document.getElementById(id)}\nvar PROT={d:{name:'Flameproof enclosure',std:'IEC 60079-1',desc:'Enclosure can withstand an internal explosion and prevent propagation to surrounding atmosphere.'},e:{name:'Increased safety',std:'IEC 60079-7',desc:'Additional measures to prevent sparks, arcs, and excessive temperatures on parts that do not normally produce them.'},ia:{name:'Intrinsic safety (level a)',std:'IEC 60079-11',desc:'Circuit cannot cause ignition even with two countable faults. Suitable for Zone 0.'},ib:{name:'Intrinsic safety (level b)',std:'IEC 60079-11',desc:'Circuit cannot cause ignition with one countable fault. Suitable for Zone 1.'},ic:{name:'Intrinsic safety (level c)',std:'IEC 60079-11',desc:'Circuit cannot cause ignition under normal operation. Suitable for Zone 2.'},p:{name:'Pressurized enclosure',std:'IEC 60079-2',desc:'Enclosure maintained at positive pressure with clean air or inert gas to prevent entry of explosive atmosphere.'},px:{name:'Pressurized (type px)',std:'IEC 60079-2',desc:'Pressurized to reduce Zone 1 to non-hazardous inside enclosure.'},py:{name:'Pressurized (type py)',std:'IEC 60079-2',desc:'Pressurized to reduce Zone 1 to Zone 2 inside enclosure.'},pz:{name:'Pressurized (type pz)',std:'IEC 60079-2',desc:'Pressurized to reduce Zone 2 to non-hazardous inside enclosure.'},m:{name:'Encapsulation',std:'IEC 60079-18',desc:'Components encapsulated in compound to prevent contact with explosive atmosphere.'},ma:{name:'Encapsulation (level a)',std:'IEC 60079-18',desc:'Two faults tolerated. Zone 0 suitable.'},mb:{name:'Encapsulation (level b)',std:'IEC 60079-18',desc:'One fault tolerated. Zone 1 suitable.'},nA:{name:'Non-sparking',std:'IEC 60079-15',desc:'Equipment not capable of producing arcs or sparks in normal operation. Zone 2 only.'},nC:{name:'Sparking contacts in enclosure',std:'IEC 60079-15',desc:'Contacts enclosed. Zone 2 only.'},nR:{name:'Restricted breathing enclosure',std:'IEC 60079-15',desc:'Enclosure restricts gas entry. Zone 2 only.'},o:{name:'Oil immersion',std:'IEC 60079-6',desc:'Parts submerged in oil preventing contact with atmosphere.'},q:{name:'Powder\/sand filling',std:'IEC 60079-5',desc:'Enclosure filled with powder to quench any internal arc.'},t:{name:'Protection by enclosure (dust)',std:'IEC 60079-31',desc:'Dust-tight or dust-protected enclosure for combustible dust atmospheres.'},ta:{name:'Enclosure (dust, level a)',std:'IEC 60079-31',desc:'Zone 20 suitable.'},tb:{name:'Enclosure (dust, level b)',std:'IEC 60079-31',desc:'Zone 21 suitable.'},tc:{name:'Enclosure (dust, level c)',std:'IEC 60079-31',desc:'Zone 22 suitable.'}};\nvar GROUPS={I:{name:'Group I \u2014 Mining',desc:'Firedamp (methane in coal mines)'},IIA:{name:'Group IIA',desc:'Propane, butane, acetone, ammonia, etc. Least stringent surface group.'},IIB:{name:'Group IIB',desc:'Ethylene, hydrogen sulfide, diethyl ether, etc.'},IIC:{name:'Group IIC',desc:'Hydrogen, acetylene, carbon disulfide. Most stringent surface group.'},IIIA:{name:'Group IIIA \u2014 Combustible flyings',desc:'Textile fibers, wood particles'},IIIB:{name:'Group IIIB \u2014 Non-conductive dust',desc:'Grain dust, flour, wood dust'},IIIC:{name:'Group IIIC \u2014 Conductive dust',desc:'Metal dust (aluminum, magnesium)'}};\nvar TCLASS={T1:{max:450},T2:{max:300},T3:{max:200},T4:{max:135},T5:{max:100},T6:{max:85}};\nvar EPL_MAP={Ga:{zone:'Zone 0, 1, 2',level:'Very High'},Gb:{zone:'Zone 1, 2',level:'High'},Gc:{zone:'Zone 2',level:'Enhanced'},Da:{zone:'Zone 20, 21, 22',level:'Very High (dust)'},Db:{zone:'Zone 21, 22',level:'High (dust)'},Dc:{zone:'Zone 22',level:'Enhanced (dust)'}};\n\nfunction decode(){\n    var s=$('vc-marking').value.trim();if(!s){$('vc-results').classList.remove('vc-visible');return}\n    var parts=[];\n    \/\/ Find protection type\n    var protMatch=s.match(\/\\b(ia|ib|ic|px|py|pz|ma|mb|nA|nC|nR|ta|tb|tc|[deiopqmnt])\\b\/i);\n    var prot=protMatch?protMatch[1]:null;\n    \/\/ Find gas group\n    var groupMatch=s.match(\/\\b(IIIC|IIIB|IIIA|IIC|IIB|IIA|II|I)\\b\/);\n    var group=groupMatch?groupMatch[1]:null;\n    \/\/ Find temperature class\n    var tMatch=s.match(\/\\bT([1-6])\\b\/);\n    var tClass=tMatch?'T'+tMatch[1]:null;\n    \/\/ Find dust temp\n    var dustTempMatch=s.match(\/T(\\d+)\u00b0C\/);\n    var dustTemp=dustTempMatch?parseInt(dustTempMatch[1]):null;\n    \/\/ Find EPL\n    var eplMatch=s.match(\/\\b(Ga|Gb|Gc|Da|Db|Dc)\\b\/);\n    var epl=eplMatch?eplMatch[1]:null;\n\n    var html='';\n    html+='<div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Marking<\/div><div class=\"vc-rcard-value\">'+s+'<\/div><\/div>';\n    if(prot&&PROT[prot]){var p=PROT[prot];html+='<div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Protection Type: '+prot+'<\/div><div class=\"vc-rcard-value\" style=\"font-size:16px\">'+p.name+'<\/div><div class=\"vc-rcard-desc\">'+p.desc+'<br><strong>Standard:<\/strong> '+p.std+'<\/div><\/div>'}\n    if(group&&GROUPS[group]){var g=GROUPS[group];html+='<div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Gas\/Dust Group: '+group+'<\/div><div class=\"vc-rcard-value\" style=\"font-size:16px\">'+g.name+'<\/div><div class=\"vc-rcard-desc\">'+g.desc+'<\/div><\/div>'}\n    if(tClass&&TCLASS[tClass]){html+='<div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Temperature Class: '+tClass+'<\/div><div class=\"vc-rcard-value\">\u2264 '+TCLASS[tClass].max+'\u00b0C<\/div><div class=\"vc-rcard-desc\">Maximum surface temperature of equipment<\/div><\/div>'}\n    if(dustTemp){html+='<div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Max Surface Temperature (Dust)<\/div><div class=\"vc-rcard-value\">'+dustTemp+'\u00b0C<\/div><\/div>'}\n    if(epl&&EPL_MAP[epl]){var e=EPL_MAP[epl];html+='<div class=\"vc-rcard\"><div class=\"vc-rcard-label\">EPL: '+epl+'<\/div><div class=\"vc-rcard-value\" style=\"font-size:16px\">'+e.level+'<\/div><div class=\"vc-rcard-desc\">Suitable for: <strong>'+e.zone+'<\/strong><\/div><\/div>'}\n    if(!prot&&!group&&!tClass&&!epl){html+='<div class=\"vc-rcard\" style=\"grid-column:1\/-1\"><div class=\"vc-rcard-value\" style=\"font-size:16px;color:var(--vc-ink-muted)\">Could not parse marking. Try a format like \"Ex d IIB T4 Gb\"<\/div><\/div>'}\n    $('vc-r-grid').innerHTML=html;\n    $('vc-results').classList.add('vc-visible');\n}\n\n$('vc-marking').addEventListener('input',decode);\n\ndocument.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('vc-marking').value=this.getAttribute('data-v');decode()})});\n\n$('vc-copy-btn').addEventListener('click',function(){var text='Ex Marking Decode\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n'+$('vc-r-grid').textContent.replace(\/\\s+\/g,' ').trim()+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu\/calculators\/ex-marking-decoder\/';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';setTimeout(function(){b.classList.remove('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy'},2000)})}});\n\ndocument.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n\nvar faqData=[\n    {q:'What does Ex d IIB T4 mean?',a:'<p><strong>Ex<\/strong> = explosion protected. <strong>d<\/strong> = flameproof enclosure. <strong>IIB<\/strong> = Gas Group IIB (ethylene). <strong>T4<\/strong> = max surface temp 135\u00b0C. Suitable for Zone 1 and Zone 2.<\/p>'},\n    {q:'What are the main protection types?',a:'<p>Common types: <strong>d<\/strong>=flameproof, <strong>e<\/strong>=increased safety, <strong>i<\/strong>=intrinsic safety, <strong>p<\/strong>=pressurized, <strong>n<\/strong>=non-sparking, <strong>m<\/strong>=encapsulation, <strong>t<\/strong>=dust enclosure.<\/p>'},\n    {q:'What are gas groups I, IIA, IIB, IIC?',a:'<p>Group <strong>I<\/strong>=mining (methane). <strong>IIA<\/strong>=propane class. <strong>IIB<\/strong>=ethylene class. <strong>IIC<\/strong>=hydrogen class (most stringent). Equipment rated IIC covers all groups.<\/p>'},\n    {q:'What are temperature classes T1 to T6?',a:'<p>T1=450\u00b0C, T2=300\u00b0C, T3=200\u00b0C, T4=135\u00b0C, T5=100\u00b0C, T6=85\u00b0C. The class must be below the auto-ignition temperature of the gas present.<\/p>'},\n    {q:'What is EPL?',a:'<p><strong>Equipment Protection Level<\/strong>: Ga\/Da=very high (Zone 0\/20), Gb\/Db=high (Zone 1\/21), Gc\/Dc=enhanced (Zone 2\/22). Introduced in IEC 60079-0 Edition 6.<\/p>'}\n];\nvar fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\nfl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\ndecode();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Free Ex marking decoder per IEC 60079 \/ ATEX. Enter an Ex marking string to parse protection type, gas group, temperature class, EPL, and zone suitability.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100086","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100086\/revisions"}],"predecessor-version":[{"id":100419,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100086\/revisions\/100419"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/media?parent=100086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/categories?post=100086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/tags?post=100086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}