{"id":85837,"date":"2026-08-12T13:50:35","date_gmt":"2026-08-12T13:50:35","guid":{"rendered":"https:\/\/instrumentatie.ro\/?post_type=product&#038;p=85837"},"modified":"2026-08-12T13:54:24","modified_gmt":"2026-08-12T13:54:24","slug":"point-gas-detector-spectrex-rosemount-625ir","status":"publish","type":"product","link":"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/","title":{"rendered":"Point Gas Detector Spectrex Rosemount 625IR"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column width=&#8221;1\/1&#8243;][vc_column_text]<strong>Technical Specifications:<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<td><strong>Feature<\/strong><\/td>\n<td><strong>Value<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Product type<\/td>\n<td>Point gas detector with optical IR technology<\/td>\n<\/tr>\n<tr>\n<td>Detection principle<\/td>\n<td>Dual-wavelength optical absorption<\/td>\n<\/tr>\n<tr>\n<td>Technology<\/td>\n<td>Temperature-compensated solid-state IR sensing<\/td>\n<\/tr>\n<tr>\n<td>Configurable gases<\/td>\n<td>Methane or propane<\/td>\n<\/tr>\n<tr>\n<td>Measurement range<\/td>\n<td>0\u2013100% LEL<\/td>\n<\/tr>\n<tr>\n<td>Calibration<\/td>\n<td>Factory calibrated; no field calibration required<\/td>\n<\/tr>\n<tr>\n<td>Accuracy<\/td>\n<td>\u00b12% of full scale<\/td>\n<\/tr>\n<tr>\n<td>Repeatability<\/td>\n<td>\u00b11% of full scale<\/td>\n<\/tr>\n<tr>\n<td>Response time<\/td>\n<td>T90 &lt;1 s without environmental protection; T90 = 2 s with environmental protection<\/td>\n<\/tr>\n<tr>\n<td>Drift<\/td>\n<td>No zero or span drift<\/td>\n<\/tr>\n<tr>\n<td>Start-up time<\/td>\n<td>Less than 2 minutes above \u221220\u00b0C; less than 20 minutes below \u221220\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Operating temperature<\/td>\n<td>\u221240\u00b0C to +75\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Storage temperature<\/td>\n<td>\u221240\u00b0C to +75\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Relative humidity<\/td>\n<td>0\u201399% RH<\/td>\n<\/tr>\n<tr>\n<td>Supply voltage<\/td>\n<td>18\u201332 VDC<\/td>\n<\/tr>\n<tr>\n<td>Power consumption<\/td>\n<td>Less than 3 W (standard version); less than 5 W (Arctic version)<\/td>\n<\/tr>\n<tr>\n<td>Inrush current<\/td>\n<td>Limited to 1 A<\/td>\n<\/tr>\n<tr>\n<td>Analog output<\/td>\n<td>4\u201320 mA (source or sink)<\/td>\n<\/tr>\n<tr>\n<td>Digital communication<\/td>\n<td>HART<\/td>\n<\/tr>\n<tr>\n<td>Serial communication<\/td>\n<td>RS-485, Modbus RTU<\/td>\n<\/tr>\n<tr>\n<td>Status indication<\/td>\n<td>Multicolor front LED<\/td>\n<\/tr>\n<tr>\n<td>Self-diagnostics<\/td>\n<td>Continuous automatic self-monitoring<\/td>\n<\/tr>\n<tr>\n<td>Housing material<\/td>\n<td>316 stainless steel<\/td>\n<\/tr>\n<tr>\n<td>Cable entry<\/td>\n<td>\u00be-inch NPT<\/td>\n<\/tr>\n<tr>\n<td>Maximum conductor size<\/td>\n<td>2.5 mm\u00b2 stranded; 4 mm\u00b2 solid<\/td>\n<\/tr>\n<tr>\n<td>Protection rating<\/td>\n<td>IP66, IP67, NEMA 4X<\/td>\n<\/tr>\n<tr>\n<td>Mounting options<\/td>\n<td>Standalone or duct-mounted with 15 cm or 35 cm probe<\/td>\n<\/tr>\n<tr>\n<td>Weight \u2013 standalone version<\/td>\n<td>3.75 kg<\/td>\n<\/tr>\n<tr>\n<td>Weight \u2013 15 cm probe version<\/td>\n<td>4.0 kg<\/td>\n<\/tr>\n<tr>\n<td>Weight \u2013 35 cm probe version<\/td>\n<td>4.25 kg<\/td>\n<\/tr>\n<tr>\n<td>Proof test interval<\/td>\n<td>5 years<\/td>\n<\/tr>\n<tr>\n<td>Functional safety<\/td>\n<td>SIL 2 (IEC 61508)<\/td>\n<\/tr>\n<tr>\n<td>Hazardous area certifications<\/td>\n<td>ATEX, IECEx, FM (US &amp; Canada), depending on configuration<\/td>\n<\/tr>\n<tr>\n<td>Product warranty<\/td>\n<td>5-year limited warranty<\/td>\n<\/tr>\n<tr>\n<td>IR source warranty<\/td>\n<td>15 years<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Available Accessories<\/strong><\/p>\n<p>A complete range of accessories is available for installation, protection, and functional testing, including:<\/p>\n<ul>\n<li>Gas-free methane functional tester (50% LEL)<\/li>\n<li>2-inch pole mounting kit<\/li>\n<li>3-inch and 4-inch pole mounting kits<\/li>\n<li>Weather sunshield<\/li>\n<li>Insect screen<\/li>\n<li>Maintenance lockout kit<\/li>\n<li>Aspirator kit<\/li>\n<li>Remote bump test kit<\/li>\n<li>Bump test enclosure<\/li>\n<li>Environmental protection assembly<\/li>\n<li>Environmental protection cap<\/li>\n<li>Gas test nozzle<\/li>\n<li>Duct mounting flange kits<\/li>\n<li>Duct-mounted detector testing kit<\/li>\n<\/ul>\n<p><strong>Consulting &amp; Quotation<\/strong><\/p>\n<p>Looking for a point gas detector configured for your application?<\/p>\n<p>The instrumentatie.ro team can assist you with:<\/p>\n<ul>\n<li>gas selection and factory configuration<\/li>\n<li>choosing between standalone and duct-mounted versions<\/li>\n<li>output and communication configuration<\/li>\n<li>hazardous area certification selection<\/li>\n<li>mounting and testing accessories<\/li>\n<li>integration into PLC, DCS, SCADA, and safety systems<\/li>\n<\/ul>\n<p>\ud83d\udce7 <a href=\"mailto:office@instrumentatie.ro\">office@instrumentatie.ro<\/a>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column column_width_percent=&#8221;100&#8243; position_vertical=&#8221;middle&#8221; align_horizontal=&#8221;align_center&#8221; gutter_size=&#8221;3&#8243; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;1\/1&#8243; uncode_shortcode_id=&#8221;148408&#8243;][vc_button button_color=&#8221;color-731899&#8243; border_width=&#8221;0&#8243; link=&#8221;url:https%3A%2F%2Fdesusystems.com%2Fproduct%2Fpoint-gas-detectors%2Frosemount-625ir%2Frosemount-625ir-point-gas-detector%2F|target:_blank&#8221; button_color_type=&#8221;uncode-palette&#8221; uncode_shortcode_id=&#8221;174586&#8243;]DATA SHEET[\/vc_button][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The Rosemount 625IR is an optical infrared gas detector designed for continuous monitoring of combustible gases in demanding industrial applications. The device uses dual-wavelength optical absorption technology and temperature-compensated solid-state IR sensing to provide accurate measurement of target gas concentrations.<\/p>\n<p>The detector is factory-configured for methane or propane with a measuring range of 0\u2013100% Lower Explosive Limit (LEL). Factory calibration is maintained throughout the detector&#8217;s lifetime, eliminating the need for field recalibration.<\/p>\n<p>Rosemount 625IR provides real-time gas concentration and device status information. The T90 response time is less than one second without the environmental protection accessory and approximately two seconds when the protection is installed.<\/p>\n<p>Heated optics help prevent moisture accumulation on the optical surfaces, while continuous self-diagnostics monitor all critical operating functions. The detector is available as a standalone version or as a duct-mounted version with either a 15 cm or 35 cm insertion probe.<\/p>\n<p>Typical applications include:<\/p>\n<ul>\n<li>Offshore and onshore process facilities<\/li>\n<li>Oil and gas pipelines<\/li>\n<li>FPSO and FLNG installations<\/li>\n<li>Chemical and petrochemical plants<\/li>\n<li>Power generation facilities<\/li>\n<li>Refineries<\/li>\n<li>Tank farms and loading terminals<\/li>\n<li>Gas filling and distribution terminals<\/li>\n<li>Gas transmission and pipeline networks<\/li>\n<li>Hazardous areas where hydrocarbon gases may be present<\/li>\n<\/ul>\n<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"\" data-turn-id-container=\"request-6a3b89ff-955c-83eb-8a12-33d395e929f9-1\" data-is-intersecting=\"true\">\n<section class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [&#038;:has([data-writing-block])>*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(&#8211;scroll-root-safe-area-inset-bottom,0px)+var(&#8211;thread-response-height))] scroll-mt-[calc(var(&#8211;header-height)+min(200px,max(70px,20svh)))]&#8221; dir=&#8221;auto&#8221; data-turn-id=&#8221;request-6a3b89ff-955c-83eb-8a12-33d395e929f9-1&#8243; data-turn-id-container=&#8221;request-6a3b89ff-955c-83eb-8a12-33d395e929f9-1&#8243; data-testid=&#8221;conversation-turn-56&#8243; data-turn=&#8221;assistant&#8221;><\/p>\n<div class=\"text-base my-auto mx-auto pb-8 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&#038;]:mt-1\" dir=\"auto\" tabindex=\"0\" data-message-author-role=\"assistant\" data-message-id=\"2df00c3b-6e8e-450b-9e48-772f103265d0\" data-message-model-slug=\"gpt-5-6\" data-turn-start-message=\"true\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\">\n<p class=\"PDq2pG_selectionAnchorContainer\" data-section-id=\"2qq1z5\" data-start=\"0\" data-end=\"11\"><strong>Benefits:<\/strong><\/p>\n<ul data-start=\"13\" data-end=\"1390\" data-is-last-node=\"\" data-is-only-node=\"\">\n<li data-section-id=\"3pyrnc\" data-start=\"13\" data-end=\"234\">No field calibration required<br data-start=\"44\" data-end=\"47\" \/>Factory calibration is maintained throughout the detector&#8217;s service life. The system continuously verifies the IR source and receiver and automatically performs any required compensation.<\/li>\n<li data-section-id=\"1vygum0\" data-start=\"236\" data-end=\"429\">Ultra-fast response time<br data-start=\"262\" data-end=\"265\" \/>Rosemount 625IR provides a T90 response time of less than one second without the environmental protection accessory and approximately two seconds with it installed.<\/li>\n<li data-section-id=\"1ty7vh\" data-start=\"431\" data-end=\"567\">High accuracy and stability<br data-start=\"460\" data-end=\"463\" \/>The detector delivers an accuracy of \u00b12% of full scale with \u00b11% repeatability and no zero or span drift.<\/li>\n<li data-section-id=\"3uljh8\" data-start=\"569\" data-end=\"717\">Heated optics<br data-start=\"584\" data-end=\"587\" \/>The integrated heating system minimizes condensation on the optical surfaces, ensuring reliable performance in harsh environments.<\/li>\n<li data-section-id=\"olh695\" data-start=\"719\" data-end=\"879\">Continuous self-diagnostics<br data-start=\"748\" data-end=\"751\" \/>Critical functions are continuously monitored, while a multicolor front LED provides clear visual indication of detector status.<\/li>\n<li data-section-id=\"873myk\" data-start=\"881\" data-end=\"1016\">Extended proof test interval<br data-start=\"911\" data-end=\"914\" \/>A recommended five-year proof test interval helps reduce maintenance requirements and operating costs.<\/li>\n<li data-section-id=\"c3rwvl\" data-start=\"1018\" data-end=\"1131\">Gas-free functional testing<br data-start=\"1047\" data-end=\"1050\" \/>Optional accessories allow functional testing without the use of calibration gas.<\/li>\n<li data-section-id=\"1qrk2vs\" data-start=\"1133\" data-end=\"1252\">Easy industrial integration<br data-start=\"1162\" data-end=\"1165\" \/>The detector supports 4\u201320 mA analog output, HART communication, and RS-485 Modbus RTU.<\/li>\n<li data-section-id=\"1r53kdm\" data-start=\"1254\" data-end=\"1390\" data-is-last-node=\"\">Functional safety certified<br data-start=\"1283\" data-end=\"1286\" \/>Rosemount 625IR is SIL 2 certified and available with approvals for installation in hazardous locations.<\/li>\n<\/ul>\n<p><strong>Available Versions<\/strong><\/p>\n<p><strong>Rosemount 625IR \u2013 Standalone Version<\/strong><\/p>\n<p>The standard version is designed for direct installation in hazardous areas where continuous combustible gas monitoring is required.<\/p>\n<p>Main features:<\/p>\n<ul>\n<li>0\u2013100% LEL measurement range<\/li>\n<li>Factory configured for methane or propane<\/li>\n<li>\u00be-inch NPT threaded connection<\/li>\n<li>316 stainless steel housing<\/li>\n<li>Approximate weight: 3.75 kg<\/li>\n<\/ul>\n<p><strong>Rosemount 625IR \u2013 Duct Mount Version with 15 cm Probe<\/strong><\/p>\n<p>Designed for gas monitoring inside ducts and ventilation systems.<\/p>\n<p>Main features:<\/p>\n<ul>\n<li>15 cm insertion probe<\/li>\n<li>0\u2013100% LEL measurement range<\/li>\n<li>Approximate weight: 4.0 kg<\/li>\n<li>Dedicated flange mounting and testing accessories available<\/li>\n<\/ul>\n<p><strong>Rosemount 625IR \u2013 Duct Mount Version with 35 cm Probe<\/strong><\/p>\n<p>Designed for applications requiring deeper insertion into ducts or pipelines.<\/p>\n<p>Main features:<\/p>\n<ul>\n<li>35 cm insertion probe<\/li>\n<li>0\u2013100% LEL measurement range<\/li>\n<li>Approximate weight: 4.25 kg<\/li>\n<\/ul>\n<p>Compatible with duct mounting kits<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"z-0 flex min-h-[46px] justify-start\"><\/div>\n<div class=\"mt-3 w-full empty:hidden has-[>_:empty]:hidden&#8221;><\/p>\n<div class=\"text-center\"><\/div>\n<\/div>\n<\/div>\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1\" data-conversation-screenshot-content=\"\">\n<div><\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n<div class=\"pointer-events-none -mt-px h-px translate-y-(--scroll-root-safe-area-inset-bottom)\" aria-hidden=\"true\"><\/div>\n","protected":false},"featured_media":85835,"template":"","meta":[],"product_brand":[],"product_cat":[142,143],"product_tag":[],"market":[],"class_list":{"0":"post-85837","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-flame-gas-detection","7":"product_cat-gas-detectors","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Point Gas Detector Spectrex Rosemount 625IR - Instrumentatie<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Point Gas Detector Spectrex Rosemount 625IR - Instrumentatie\" \/>\n<meta property=\"og:description\" content=\"The Rosemount 625IR is an optical infrared gas detector designed for continuous monitoring of combustible gases in demanding industrial applications. The device uses dual-wavelength optical absorption technology and temperature-compensated solid-state IR sensing to provide accurate measurement of target gas concentrations. The detector is factory-configured for methane or propane with a measuring range of 0\u2013100% Lower Explosive Limit (LEL). Factory calibration is maintained throughout the detector&#039;s lifetime, eliminating the need for field recalibration. Rosemount 625IR provides real-time gas concentration and device status information. The T90 response time is less than one second without the environmental protection accessory and approximately two seconds when the protection is installed. Heated optics help prevent moisture accumulation on the optical surfaces, while continuous self-diagnostics monitor all critical operating functions. The detector is available as a standalone version or as a duct-mounted version with either a 15 cm or 35 cm insertion probe. Typical applications include:  Offshore and onshore process facilities  Oil and gas pipelines  FPSO and FLNG installations  Chemical and petrochemical plants  Power generation facilities  Refineries  Tank farms and loading terminals  Gas filling and distribution terminals  Gas transmission and pipeline networks  Hazardous areas where hydrocarbon gases may be present     Benefits:   No field calibration requiredFactory calibration is maintained throughout the detector&#039;s service life. The system continuously verifies the IR source and receiver and automatically performs any required compensation.  Ultra-fast response timeRosemount 625IR provides a T90 response time of less than one second without the environmental protection accessory and approximately two seconds with it installed.  High accuracy and stabilityThe detector delivers an accuracy of \u00b12% of full scale with \u00b11% repeatability and no zero or span drift.  Heated opticsThe integrated heating system minimizes condensation on the optical surfaces, ensuring reliable performance in harsh environments.  Continuous self-diagnosticsCritical functions are continuously monitored, while a multicolor front LED provides clear visual indication of detector status.  Extended proof test intervalA recommended five-year proof test interval helps reduce maintenance requirements and operating costs.  Gas-free functional testingOptional accessories allow functional testing without the use of calibration gas.  Easy industrial integrationThe detector supports 4\u201320 mA analog output, HART communication, and RS-485 Modbus RTU.  Functional safety certifiedRosemount 625IR is SIL 2 certified and available with approvals for installation in hazardous locations. Available Versions Rosemount 625IR \u2013 Standalone Version The standard version is designed for direct installation in hazardous areas where continuous combustible gas monitoring is required. Main features:  0\u2013100% LEL measurement range  Factory configured for methane or propane  \u00be-inch NPT threaded connection  316 stainless steel housing  Approximate weight: 3.75 kg Rosemount 625IR \u2013 Duct Mount Version with 15 cm Probe Designed for gas monitoring inside ducts and ventilation systems. Main features:  15 cm insertion probe  0\u2013100% LEL measurement range  Approximate weight: 4.0 kg  Dedicated flange mounting and testing accessories available Rosemount 625IR \u2013 Duct Mount Version with 35 cm Probe Designed for applications requiring deeper insertion into ducts or pipelines. Main features:  35 cm insertion probe  0\u2013100% LEL measurement range  Approximate weight: 4.25 kg Compatible with duct mounting kits\" \/>\n<meta property=\"og:url\" content=\"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/\" \/>\n<meta property=\"og:site_name\" content=\"Instrumentatie\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/instrumentatie.ro\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-12T13:54:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/instrumentatie.ro\/wp-content\/uploads\/2026\/08\/2-rosemount-625ir-front-right-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/instrumentatie.ro\\\/en\\\/product\\\/flame-gas-detection\\\/gas-detectors\\\/point-gas-detector-spectrex-rosemount-625ir\\\/\",\"url\":\"https:\\\/\\\/instrumentatie.ro\\\/en\\\/product\\\/flame-gas-detection\\\/gas-detectors\\\/point-gas-detector-spectrex-rosemount-625ir\\\/\",\"name\":\"Point Gas Detector Spectrex Rosemount 625IR - 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Instrumentatie","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/","og_locale":"en_US","og_type":"article","og_title":"Point Gas Detector Spectrex Rosemount 625IR - Instrumentatie","og_description":"The Rosemount 625IR is an optical infrared gas detector designed for continuous monitoring of combustible gases in demanding industrial applications. The device uses dual-wavelength optical absorption technology and temperature-compensated solid-state IR sensing to provide accurate measurement of target gas concentrations. The detector is factory-configured for methane or propane with a measuring range of 0\u2013100% Lower Explosive Limit (LEL). Factory calibration is maintained throughout the detector's lifetime, eliminating the need for field recalibration. Rosemount 625IR provides real-time gas concentration and device status information. The T90 response time is less than one second without the environmental protection accessory and approximately two seconds when the protection is installed. Heated optics help prevent moisture accumulation on the optical surfaces, while continuous self-diagnostics monitor all critical operating functions. The detector is available as a standalone version or as a duct-mounted version with either a 15 cm or 35 cm insertion probe. Typical applications include:  Offshore and onshore process facilities  Oil and gas pipelines  FPSO and FLNG installations  Chemical and petrochemical plants  Power generation facilities  Refineries  Tank farms and loading terminals  Gas filling and distribution terminals  Gas transmission and pipeline networks  Hazardous areas where hydrocarbon gases may be present     Benefits:   No field calibration requiredFactory calibration is maintained throughout the detector's service life. The system continuously verifies the IR source and receiver and automatically performs any required compensation.  Ultra-fast response timeRosemount 625IR provides a T90 response time of less than one second without the environmental protection accessory and approximately two seconds with it installed.  High accuracy and stabilityThe detector delivers an accuracy of \u00b12% of full scale with \u00b11% repeatability and no zero or span drift.  Heated opticsThe integrated heating system minimizes condensation on the optical surfaces, ensuring reliable performance in harsh environments.  Continuous self-diagnosticsCritical functions are continuously monitored, while a multicolor front LED provides clear visual indication of detector status.  Extended proof test intervalA recommended five-year proof test interval helps reduce maintenance requirements and operating costs.  Gas-free functional testingOptional accessories allow functional testing without the use of calibration gas.  Easy industrial integrationThe detector supports 4\u201320 mA analog output, HART communication, and RS-485 Modbus RTU.  Functional safety certifiedRosemount 625IR is SIL 2 certified and available with approvals for installation in hazardous locations. Available Versions Rosemount 625IR \u2013 Standalone Version The standard version is designed for direct installation in hazardous areas where continuous combustible gas monitoring is required. Main features:  0\u2013100% LEL measurement range  Factory configured for methane or propane  \u00be-inch NPT threaded connection  316 stainless steel housing  Approximate weight: 3.75 kg Rosemount 625IR \u2013 Duct Mount Version with 15 cm Probe Designed for gas monitoring inside ducts and ventilation systems. Main features:  15 cm insertion probe  0\u2013100% LEL measurement range  Approximate weight: 4.0 kg  Dedicated flange mounting and testing accessories available Rosemount 625IR \u2013 Duct Mount Version with 35 cm Probe Designed for applications requiring deeper insertion into ducts or pipelines. Main features:  35 cm insertion probe  0\u2013100% LEL measurement range  Approximate weight: 4.25 kg Compatible with duct mounting kits","og_url":"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/","og_site_name":"Instrumentatie","article_publisher":"https:\/\/www.facebook.com\/instrumentatie.ro","article_modified_time":"2026-08-12T13:54:24+00:00","og_image":[{"width":1000,"height":1000,"url":"https:\/\/instrumentatie.ro\/wp-content\/uploads\/2026\/08\/2-rosemount-625ir-front-right-1.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/","url":"https:\/\/instrumentatie.ro\/en\/product\/flame-gas-detection\/gas-detectors\/point-gas-detector-spectrex-rosemount-625ir\/","name":"Point Gas Detector Spectrex Rosemount 625IR - 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