{"id":13391,"date":"2025-07-22T08:00:00","date_gmt":"2025-07-22T08:00:00","guid":{"rendered":"https:\/\/www.thermofisher.com\/blog\/mining\/?p=13391"},"modified":"2025-07-14T15:13:16","modified_gmt":"2025-07-14T15:13:16","slug":"how-to-safely-use-a-process-raman-analyzer-in-a-hazardous-location","status":"publish","type":"post","link":"https:\/\/www.thermofisher.com\/blog\/mining\/how-to-safely-use-a-process-raman-analyzer-in-a-hazardous-location\/","title":{"rendered":"How to Safely Use a Process Raman Analyzer in a Hazardous Location"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color has-link-color wp-elements-966ad4442da9502723fd630e8f6eb0c1\"><a>When your process takes place in a hazardous environment, precision and safety go hand in hand. For facilities handling flammable gases, volatile solvents, or combustible dusts, analytical equipment must do more than deliver accurate results\u2014it must meet stringent safety requirements to avoid triggering an explosion or fire.<\/a><\/p>\n\n\n\n<p>In this blog, we\u2019ll break down what a hazardous location is, how these environments are classified, and what to consider when installing a <a href=\"https:\/\/www.thermofisher.com\/order\/catalog\/product\/MARQMETRIXAIOX?icid=CAD_blog_mining_2025July\" target=\"_blank\" rel=\"noreferrer noopener\">Raman analyzer<\/a> for safe, real-time process monitoring in these settings.\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-a-hazardous-location\"><strong>What is a hazardous location?<\/strong><\/h2>\n\n\n\n<p>A hazardous location is any area where flammable gases, vapors, dusts, or fibers may be present in sufficient quantities to create a risk of fire or explosion. These environments are common in industries such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil and gas (midstream and downstream)<\/li>\n\n\n\n<li>Petrochemical processing<\/li>\n\n\n\n<li>Pharmaceuticals<\/li>\n\n\n\n<li>Chemical production<\/li>\n<\/ul>\n\n\n\n<p>The risk is typically introduced by the presence of flammable substances combined with oxygen and a potential ignition source. For any measurement device to operate safely in such settings, it must be specifically designed and certified for the environment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-understanding-hazardous-location-classifications\"><strong>Understanding hazardous location classifications<\/strong><\/h2>\n\n\n\n<p>Hazardous environments are regulated to prevent ignition of flammable substances due to electrical or mechanical equipment. Several international classification systems define the nature and severity of these risks, guiding what equipment can be safely used and how it must be certified.<\/p>\n\n\n\n<p><strong>NEC \/ CEC (North America<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"851\" height=\"591\" src=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-2.png\" alt=\"\" class=\"wp-image-13394\" srcset=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-2.png 851w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-2-300x208.png 300w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-2-768x533.png 768w\" sizes=\"auto, (max-width: 851px) 100vw, 851px\" \/><\/figure>\n\n\n\n<p>In the U.S. and Canada, hazardous locations are classified using the Class\/Division system defined by the National Electrical Code (NEC) and Canadian Electrical Code (CEC).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Classes<ul><li>Class I \u2013 Locations where flammable gases or vapors are present in the air in sufficient quantities to produce explosive or ignitable mixtures<\/li><\/ul><ul><li>Class II &#8211; Locations where combustible dust is present<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>Class III &#8211; Locations where ignitable fibers or flyings are present<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Divisions<ul><li>Division 1 \u2013 Hazard is present during normal operation<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>Division 2 \u2013 Hazard is present only under abnormal conditions<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"457\" height=\"449\" src=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-1.png\" alt=\"\" class=\"wp-image-13393\" srcset=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-1.png 457w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-1-300x295.png 300w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-1-80x80.png 80w\" sizes=\"auto, (max-width: 457px) 100vw, 457px\" \/><\/figure>\n\n\n\n<p><strong>ATEX (Europe)<\/strong><\/p>\n\n\n\n<p>ATEX (from the French <em>ATmosph\u00e8res EXplosibles<\/em>) is the European Union directive that governs equipment intended for use in explosive atmospheres. It uses a Zone system based on the likelihood and duration of exposure to explosive gases or dusts.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zone 0 (gas), Zone 20 (dust)\u2013 Explosive atmosphere is present continuously or for long periods<\/li>\n\n\n\n<li>Zone 1 (gas), Zone 21 (dust) \u2013 Likely to be present under normal conditions<\/li>\n\n\n\n<li>Zone 2 (gas), Zone 22 (dust) \u2013 Unlikely to occur, and if it does, only for a short duration<\/li>\n<\/ul>\n\n\n\n<p><strong>IECEx (International)<\/strong><\/p>\n\n\n\n<p>IECEx is the International Electrotechnical Commission System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres. It provides a globally harmonized certification system for manufacturers and end-users operating in hazardous environments.<\/p>\n\n\n\n<p><strong>IECEx<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uses the same Zone classification system as ATEX (Zone 0, 1, 2 for gases; Zone 20, 21, 22 for dusts).<\/li>\n\n\n\n<li>Is built on IEC standards (such as IEC 60079) to ensure consistency worldwide.<\/li>\n\n\n\n<li>Offers a streamlined approach for deploying certified equipment across multiple countries, reducing the need for re-testing or re-certification regionally.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"441\" height=\"388\" src=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image.png\" alt=\"\" class=\"wp-image-13392\" srcset=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image.png 441w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-300x264.png 300w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-310x274.png 310w\" sizes=\"auto, (max-width: 441px) 100vw, 441px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>System<\/strong><\/td><td><strong>Region \/ Origin<\/strong><\/td><td><strong>Classification Approach<\/strong><\/td><td><strong>Hazard Zones \/ Levels<\/strong><\/td><td><strong>Equipment Groups \/ Categories<\/strong><\/td><td><strong>Key Notes\u00a0<\/strong><\/td><\/tr><\/thead><tbody><tr><td>NEC \/ CEC<\/td><td>North America (U.S. \/ Canada)<\/td><td>Class \/ Division system<\/td><td>&#8211; Class I: Gases\/Vapors &#8211; Class 2: Dust &#8211; Class 3: Fibers\/Flyings<br>&#8211; Division 1: Normal operation<br>&#8211; Division 2: Abnormal conditions<\/td><td>Not grouped like ATEX\/IECEx<\/td><td>Widely used in the U.S. and Canada; based on presence likelihood and material type<\/td><\/tr><tr><td>ATEX<\/td><td>European Union<\/td><td>Zone system<\/td><td>&#8211; Zone 0 (gas), 20 (dust): Continuous presence<br>&#8211; Zone 1 (gas), 21 (dust): Likely during normal operation<br>&#8211; Zone 2 (gas), 22 (dust): Unlikely or short duration<\/td><td>&#8211; Group I: Mining<br>&#8211; Group II: Industry<\/td><td>EU Directive (2014\/34\/EU); legal requirement in EU countries<\/td><\/tr><tr><td>IECEx<\/td><td>International (Global)<\/td><td>Zone system (same as ATEX)<\/td><td>&#8211; Zone 0, 1, 2 (Gases)<br>&#8211; Zone 20, 21, 22 (Dusts)<\/td><td>Same as ATEX (follows IEC 60079 standards)<\/td><td>Globally harmonized; facilitates multi-country equipment certification<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-challenges-with-analytical-tools-in-hazardous-process-monitoring\"><strong>Common challenges with analytical tools in hazardous process monitoring<\/strong><\/h2>\n\n\n\n<p>Deploying instruments for process monitoring in hazardous locations presents a unique set of challenges:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ignition risk: Any spark or hot surface can trigger combustion.<\/li>\n\n\n\n<li>Limited accessibility: Equipment is often installed in hard-to-reach zones, making routine maintenance difficult.<\/li>\n\n\n\n<li>Environmental extremes: Vibration, dust, humidity, and high or low temperatures can impact sensitive instruments.<\/li>\n<\/ul>\n\n\n\n<p>These challenges make it essential to select equipment that is both rugged and compliant.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-raman-spectroscopy-is-ideal-for-process-monitoring-in-hazardous-locations\"><strong>Why Raman spectroscopy is ideal for process monitoring in hazardous locations<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.thermofisher.com\/us\/en\/home\/industrial\/spectroscopy-elemental-isotope-analysis\/molecular-spectroscopy\/raman-microscopy.html?icid=CAD_blog_mining_2025July\" target=\"_blank\" rel=\"noreferrer noopener\">Raman spectroscopy<\/a> provides real-time, non-destructive analysis of chemical composition without the need to transport or prepare samples, making it particularly well-suited for process monitoring in hazardous applications. It can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Analyze gases, liquids, and solids directly in-line<\/li>\n\n\n\n<li>Operate through sight glasses or flow cells<\/li>\n\n\n\n<li>Deliver immediate feedback for process control or safety decisions<\/li>\n<\/ul>\n\n\n\n<p>The <a href=\"https:\/\/www.thermofisher.com\/order\/catalog\/product\/MARQMETRIXAIOX?icid=CAD_blog_mining_2025July\" target=\"_blank\" rel=\"noreferrer noopener\">new generation<\/a> of Raman analyzers are robust, compact, and require no calibration as well as minimal preventive maintenance. Moreover, <a href=\"https:\/\/www.thermofisher.com\/us\/en\/home\/industrial\/pharma-biopharma\/manufacturing-control-pharma-biopharma\/process-analytical-technology\/marqmetrix-process-raman-solution\/instruments.html?icid=CAD_blog_mining_2025July\" target=\"_blank\" rel=\"noreferrer noopener\">sampling optics<\/a> are specifically designed to withstand corrosive environments, elevated temperatures, and high-pressure conditions. With certified equipment and proper installation, Raman analyzers can help optimize process, improve safety, and reduce downtime in some of the most demanding industrial environments.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-considerations-for-using-raman-analyzers-in-hazardous-environments\"><strong>Key considerations for using Raman analyzers in hazardous environments<\/strong><\/h2>\n\n\n\n<p>When choosing a Raman analyzer for use in a hazardous location, keep the following requirements and essential features in mind:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Certification for ATEX\/IECEX Zone 0 or 20, Class I,2, or 3 with Div 1. These certifications mean that the analyzer is designed for the safest operation<\/li>\n\n\n\n<li>Inherent safety and protection for optical radiation<\/li>\n\n\n\n<li>Thermal stability and low surface temperature to meet T-rating standards<\/li>\n\n\n\n<li>Remote control and diagnostics to reduce the need for physical access<\/li>\n\n\n\n<li>No calibration and minimal preventive maintenance for hard-to-reach hazardous areas<\/li>\n\n\n\n<li>Robust probes\/optics to withstand high temperature, pressure, and corrosive conditions<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-typical-installation-of-raman-analyzers-for-process-monitoring-in-hazardous-locations\"><strong>Typical installation of Raman analyzers for process monitoring in hazardous locations<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The base spectrometer is commonly deployed in a non-hazardous (safe) area whenever possible. This base often includes the laser, detector, computer, and the majority of electronics.<\/li>\n\n\n\n<li>If the base spectrometer is required to be placed in hazardous locations, it is typically housed in an explosion-proof enclosure equipped with purge systems.<\/li>\n\n\n\n<li>Fiber optic cable with sampling probe, connected to the base spectrometer through an intrinsically safe circuit, is then used for hazardous process monitoring.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"468\" src=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-3.png\" alt=\"\" class=\"wp-image-13395\" srcset=\"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-3.png 936w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-3-300x150.png 300w, https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/07\/image-3-768x384.png 768w\" sizes=\"auto, (max-width: 936px) 100vw, 936px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The system is integrated into facility safety protocols, including emergency shutoff and pressure relief measures.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-takeaways\"><strong>Key takeaways<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hazardous locations require specialized, certified equipment to avoid ignition risks.<\/li>\n\n\n\n<li>Understanding the classification of your environment is critical for safe Raman analyzer deployment for process monitoring.<\/li>\n\n\n\n<li>Features like ATEX\/IECEx\/NEC or CEC certifications, remote sampling, and rugged design are essential.<\/li>\n\n\n\n<li>Raman offers a fast, safe, and reliable way to monitor chemical processes without requiring sample transport.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-additional-resources\"><strong>Additional Resources<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Application Note: <a href=\"https:\/\/assets.thermofisher.com\/TFS-Assets\/CAD\/Application-Notes\/marqmetrix-all-in-one-x-process-raman-analyzer-an1350-en.pdf?icid=CAD_blog_mining_2025July\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Natural Gas Analysis in Hazardous Locations Using Raman Spectroscopy and Chemometric Modeling<\/em><\/a>. Precise natural gas measurements are critical in any environment, and this note describes how Raman spectroscopy combined with chemometric modelling provides a potent solution.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p><a id=\"_msocom_1\"><\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><a id=\"_msocom_2\"><\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When your process takes place in a hazardous environment, precision and safety go hand in hand. For facilities handling flammable gases, volatile solvents, or combustible dusts, analytical equipment must do more than deliver accurate results\u2014it must meet stringent safety requirements to avoid triggering an explosion or fire. In this blog, we\u2019ll break down what a<\/p>\n","protected":false},"author":38,"featured_media":13396,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7],"tags":[446,445,49,428,364,332],"division":[],"class_list":{"0":"post-13391","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-oil-and-gas","8":"tag-chemical-production","9":"tag-hazmat","10":"tag-oil-and-gas-2","11":"tag-petrochemical","12":"tag-raman","13":"tag-raman-spectroscopy","14":"entry"},"_selected_authors":[741],"_selected_reviewers":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - 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