{"id":2404,"date":"2021-09-28T11:40:07","date_gmt":"2021-09-28T11:40:07","guid":{"rendered":"https:\/\/www.nplindia.org\/?page_id=2404"},"modified":"2025-09-18T07:14:55","modified_gmt":"2025-09-18T07:14:55","slug":"gas-metrology","status":"publish","type":"page","link":"https:\/\/www.nplindia.in\/index.php\/science-technology\/environmental-sciences-and-biomedical-metrology-division\/gas-metrology\/","title":{"rendered":"Gas Metrology"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2404\" class=\"elementor elementor-2404\">\n\t\t\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-5edd364 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"26262\" data-id=\"5edd364\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-164a5d9 jltma-glass-effect-no\" data-eae-slider=\"42939\" data-id=\"164a5d9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-8e67857 jltma-glass-effect-no\" data-eae-slider=\"75016\" data-id=\"8e67857\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-a8543e4 jltma-glass-effect-no\" data-eae-slider=\"49617\" data-id=\"a8543e4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-9aba76c jltma-glass-effect-no\" data-eae-slider=\"70879\" data-id=\"9aba76c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-33c8941 jltma-glass-effect-no elementor-widget elementor-widget-text-editor\" data-id=\"33c8941\" data-element_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><a href=\"\/index.php\/science-technology\/environmental-sciences-and-biomedical-metrology-division\/gas-metrology_hindi\/\" target=\"_blank\" rel=\"noopener\"><em>\u0939\u093f\u0928\u094d\u0926\u0940<\/em><\/a><\/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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-54b5b86 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"61497\" data-id=\"54b5b86\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-956e00f jltma-glass-effect-no\" data-eae-slider=\"33830\" data-id=\"956e00f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2194ea4 jltma-glass-effect-no elementor-widget elementor-widget-shortcode\" data-id=\"2194ea4\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"13197\" class=\"elementor elementor-13197\">\n\t\t\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-6eee7c7 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"1006\" data-id=\"6eee7c7\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-8b75a1a jltma-glass-effect-no\" data-eae-slider=\"49765\" data-id=\"8b75a1a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3ac131a elementor-widget-tablet__width-auto elementor-widget-mobile__width-auto jltma-glass-effect-no elementor-widget elementor-widget-image\" data-id=\"3ac131a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2023\/01\/CSIR-removebg-preview-150x150.png\" class=\"attachment-thumbnail size-thumbnail wp-image-24151\" alt=\"\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2023\/01\/CSIR-removebg-preview-150x150.png 150w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2023\/01\/CSIR-removebg-preview-300x300.png 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2023\/01\/CSIR-removebg-preview.png 500w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/>\t\t\t\t\t\t\t\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<\/div>\n\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-9e41c9f jltma-glass-effect-no\" data-eae-slider=\"5578\" data-id=\"9e41c9f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-21388ae jltma-glass-effect-no elementor-widget elementor-widget-text-editor\" data-id=\"21388ae\" data-element_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 style=\"text-align: center; font-size: 43px; font-family: Arial Rounded MT Bold;\"><span style=\"color: #ffffff;\">\u0938\u0940\u090f\u0938\u0906\u0908\u0906\u0930-\u0930\u093e\u0937\u094d\u091f\u094d\u0930\u0940\u092f \u092d\u094c\u0924\u093f\u0915 \u092a\u094d\u0930\u092f\u094b\u0917\u0936\u093e\u0932\u093e<\/span><\/p><p style=\"text-align: center; font-size: 40px; font-family: Cooper Black;\"><span style=\"color: #ffffff;\"><span style=\"text-decoration: none;\">CSIR-National Physical Laborator<\/span>y<\/span><\/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<\/div>\n\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-2044372 jltma-glass-effect-no\" data-eae-slider=\"52317\" data-id=\"2044372\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-eb96210 jltma-glass-effect-no elementor-widget elementor-widget-image\" data-id=\"eb96210\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/12\/npl-1-150x150.png\" class=\"attachment-thumbnail size-thumbnail wp-image-39141\" alt=\"\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/12\/npl-1-150x150.png 150w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/12\/npl-1.png 200w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/>\t\t\t\t\t\t\t\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-38ab883 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"26255\" data-id=\"38ab883\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-de3d29e jltma-glass-effect-no\" data-eae-slider=\"3565\" data-id=\"de3d29e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-08d8114 hfe-nav-menu__align-left hfe-submenu-icon-arrow hfe-submenu-animation-none hfe-link-redirect-child hfe-nav-menu__breakpoint-tablet jltma-glass-effect-no elementor-widget elementor-widget-navigation-menu\" data-id=\"08d8114\" data-element_type=\"widget\" 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Scientists Forum<\/a><\/li>\n\t<li id=\"menu-item-9958\" class=\"menu-item menu-item-type-post_type menu-item-object-page hfe-creative-menu\"><a href=\"https:\/\/www.nplindia.in\/index.php\/important-links\/downloads\/\" class = \"hfe-sub-menu-item\">Downloads<\/a><\/li>\n<\/ul>\n<\/li>\n<li id=\"menu-item-781\" class=\"menu-item menu-item-type-post_type menu-item-object-page parent hfe-creative-menu\"><a href=\"https:\/\/www.nplindia.in\/index.php\/administration\/\" class = \"hfe-menu-item\">Administration<\/a><\/li>\n<\/ul> \n\t\t\t\t<\/nav>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-1e18052 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"61672\" data-id=\"1e18052\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-59ed101 jltma-glass-effect-no\" data-eae-slider=\"13936\" data-id=\"59ed101\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a023bcd jltma-glass-effect-no elementor-widget elementor-widget-heading\" data-id=\"a023bcd\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">Gas Metrology<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-d8f7474 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"37386\" data-id=\"d8f7474\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c87debf jltma-glass-effect-no\" data-eae-slider=\"64816\" data-id=\"c87debf\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-630df2a jltma-glass-effect-no elementor-widget elementor-widget-accordion\" data-id=\"630df2a\" data-element_type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1031\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1031\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">About<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1031\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1031\"><p style=\"text-align: justify;\">Gas metrology directly relate with the quality assurance of air and emission, health, energy, food, etc. and hence indirectly influence the life style of common people, trade, economy, and finally to the economic growth. CSIR-National Physical Laboratory, India (NPLI), the NMI of India, has a major activity of <em>Gas Metrology<\/em> which includes realization of mole in gas measurements through gravimetric preparation of gas standards to provide the traceability to SI unit for emission, energy, GHGs and air quality measurements as per National Ambient Air Quality Standards (NAAQS).<\/p><p style=\"text-align: justify;\">Gas metrology activity of a National Metrology Institute (NMI) has a direct role to play on the economic growth of that country. Therefore, this activity is an inherent and major part of any NMI in the world, and therefore at International Bureau of Weights and Measures (BIPM), the Consultative Committee for Amount of Substance (CCQM) has a separate sub-committee on the Gas Analysis Working Group (CCQM-GAWG). The details of internationally accepted mission of this activity are available on BIPM website (<a href=\"https:\/\/www.bipm.org\/en\/home\">https:\/\/www.bipm.org\/en\/home)<\/a><\/p><p style=\"text-align: justify;\">Gas Metrology Activity at CSIR-NPL is underpinning measurements of gas and airborne particles in the field of global atmospheric monitoring of Green House Gases (GHGs), vehicular emissions and NAAQS parameters e.g., PM<sub>2.5<\/sub>\/PM<sub>10<\/sub>, CO, SO<sub>2<\/sub>, NO<sub>2<\/sub>, Benzene and Particulate -Pb, -As and \u2013Ni, etc. Available standards are CO<sub>2<\/sub>, CH<sub>4<\/sub>, CO, SO<sub>2<\/sub>, NO in nitrogen matrix and transfer standards of high volume PM<sub>2.5<\/sub> sampler.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1032\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1032\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Research Areas<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1032\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1032\"><ul><li>Dissemination of SI unit \u2018mol\u2019 by development of Primary Reference Gas Mixtures (PRGMs i.e. Gas BNDs) for greenhouse gases, pollution gases, energy and emission gases, particulate matter standard.<\/li><li>Participation in international inter-comparisons and to organise proficiency testing programme.<\/li><li>Calibration of particulate matter samplers and related testing and project jobs.<\/li><li>Air quality\/emission related instrument development\/ transfer standards.<\/li><li>Research and development for Gas and aerosol related reference methods, standards and instruments.<\/li><li>Organising workshop, training, awareness and skill development programs.<\/li><\/ul><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1033\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1033\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Metrology<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1033\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1033\"><ol><li><strong>Testing &amp; Calibration<\/strong><br \/>Gas metrology is offering testing and calibration services e.g. calibration of particulate matter sampler, cutoff size of PM<sub>2.5<\/sub> impactor, calibration of particle counter and testing of filter paper\/mask etc. The price details of these services are at CFCT site of CSIR-NPL.<\/li><li><strong>Certification Activity<br \/><\/strong>&#8211; Testing of PM <sub>2.5<\/sub> sampler for cutoff size<br \/>&#8211; Gas standards for emission and ambient range for calibration of instruments<\/li><\/ol><ul><\/ul><ol start=\"3\"><li><strong>Traceability Dissemination<br \/><\/strong>We provide gas measurement infrastructure in the nation via PRGMs which are prepared as per ISO 17034:2016. PRGMs for GHGs, pollution gases and emission gases are available for dissemination. For the PRGM\/BND charges and other procedure visit <span style=\"color: #0000ff;\"><a href=\"https:\/\/www.nplindia.org\/index.php\/commercial-services\/calibration-testing\/\" style=\"color: #0000ff;\">https:\/\/www.nplindia.org\/index.php\/commercial-services\/calibration-testing\/<\/a><\/span>.<br \/>Contact the gas metrology staff for the availability of gas standards.<\/li><\/ol><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1034\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1034\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Current R&D Projects<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1034\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1034\"><ol><li>\u201cDevelopment of Green-House Gas standards, National Ambient Air quality standards and vehicular emission gas standards\u201d In-house ongoing project.<\/li><li>\u201cQuality Checks of the Data and Instruments Working at Air Quality Monitoring Station in Raipur City\u201d sponsored by Chhattisgarh Environmental Conservation Board (CECB) Raipur.<\/li><li>\u201cDevelopment and Calibration of PM2.5\/PM10 Sampler\u201d sponsored by DST.<\/li><li>\u201cDevelopment of a Primary facility for Calibration of Particulate Matter (PM) Samplers\u201d, sponsored by CSIR-NPL.<\/li><li>\u201cDevelopment of Facility for testing of Mask\u201d sponsored by CSIR.<\/li><li>\u201cTesting of PM and CO2 level control in a room by the ventilation device\u201d, Technical service project sponsored by industry.<\/li><\/ol><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1035\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1035\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Major Research Highlights<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1035\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1035\"><p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2022\/06\/1.jpg\" alt=\"gas_metrology_at_CSIR-NPL\" width=\"935\" height=\"1558\" class=\"aligncenter size-full wp-image-21923\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/1.jpg 935w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/1-180x300.jpg 180w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/1-615x1024.jpg 615w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/1-768x1280.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/1-922x1536.jpg 922w\" sizes=\"(max-width: 935px) 100vw, 935px\" \/><\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1036\" class=\"elementor-tab-title\" data-tab=\"6\" role=\"button\" aria-controls=\"elementor-tab-content-1036\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Facilities<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1036\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"6\" role=\"region\" aria-labelledby=\"elementor-tab-title-1036\"><p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2022\/06\/2.jpg\" alt=\"facilities_in_gas_metrology\" width=\"954\" height=\"451\" class=\"aligncenter size-full wp-image-21930\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/2.jpg 954w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/2-300x142.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/2-768x363.jpg 768w\" sizes=\"(max-width: 954px) 100vw, 954px\" \/><\/p><p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2022\/06\/3.jpg\" alt=\"facilities_in_gas_metrology\" width=\"632\" height=\"440\" class=\"aligncenter size-full wp-image-21931\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/3.jpg 632w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/3-300x209.jpg 300w\" sizes=\"(max-width: 632px) 100vw, 632px\" \/><\/p><p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2022\/06\/4.jpg\" alt=\"facilities_in_gas_metrology\" width=\"554\" height=\"495\" class=\"aligncenter size-full wp-image-21932\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/4.jpg 554w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/4-300x268.jpg 300w\" sizes=\"(max-width: 554px) 100vw, 554px\" \/><\/p><p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2022\/06\/5.jpg\" alt=\"facilities_in_gas_metrology\" width=\"557\" height=\"408\" class=\"aligncenter size-full wp-image-21933\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/5.jpg 557w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/5-300x220.jpg 300w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/p><p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2022\/06\/6.jpg\" alt=\"aerosol_wind_tunnel_facility\" width=\"560\" height=\"433\" class=\"aligncenter size-full wp-image-21934\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/6.jpg 560w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/6-300x232.jpg 300w\" sizes=\"(max-width: 560px) 100vw, 560px\" \/><\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h6 id=\"elementor-tab-title-1037\" class=\"elementor-tab-title\" data-tab=\"7\" role=\"button\" aria-controls=\"elementor-tab-content-1037\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Team<\/a>\n\t\t\t\t\t<\/h6>\n\t\t\t\t\t<div id=\"elementor-tab-content-1037\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"7\" role=\"region\" aria-labelledby=\"elementor-tab-title-1037\"><p><a href=\"\/wp-content\/uploads\/2022\/03\/shankar@nplindia.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Dr. Shankar G Aggarwal<\/strong><\/a><br \/>Chief Scientist &amp; Head- Gas Metrology<br \/><span style=\"text-decoration: underline;\">Contact: <\/span>: +91 11 4560 8331<br \/><span style=\"text-decoration: underline;\">Email<\/span>: aggarwalsg<span>.nplindia@csir.res.in<\/span><\/p><ul><li><a href=\"\/wp-content\/uploads\/common\/daya_soni@nplindia.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Dr. Daya Soni<\/strong><\/a><br \/>Senior Principal Scientist\u00a0<br \/><span style=\"text-decoration: underline;\">Email<\/span>: dsoni<span>.nplindia@csir.res.in<\/span><\/li><li><a href=\"\/wp-content\/uploads\/common\/shikha@nplindia.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Dr. Shikha Sharma<\/strong><\/a><br \/>Scientist<br \/><span style=\"text-decoration: underline;\">Email<\/span>: <span>shikha.nplindia@csir.res.in<\/span><\/li><li><a href=\"\/wp-content\/uploads\/2022\/08\/khem_singh@nplindia.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Dr. Khem Singh<\/strong><\/a><br \/>Senior Technical Officer (2)<br \/><span style=\"text-decoration: underline;\">Email<\/span>: khem008<span>.nplindia@csir.res.in<\/span><\/li><li><p><strong>Ms. Abha Shukla<br \/><\/strong>Technical Officer-1<\/p><\/li><\/ul><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-79e57a8 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"93785\" data-id=\"79e57a8\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6a49575 jltma-glass-effect-no\" data-eae-slider=\"8320\" data-id=\"6a49575\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a76127b jltma-glass-effect-no elementor-widget elementor-widget-heading\" data-id=\"a76127b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-medium\">Photo Gallery <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-a5b7603 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"65069\" data-id=\"a5b7603\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c24d5c8 jltma-glass-effect-no\" data-eae-slider=\"59313\" data-id=\"c24d5c8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0910c1e gallery-spacing-custom jltma-glass-effect-no elementor-invisible elementor-widget elementor-widget-image-gallery\" data-id=\"0910c1e\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"image-gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-image-gallery\">\n\t\t\t\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-2404 gallery-columns-4 gallery-size-medium'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"220\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p1-300x220.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21954\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p1-300x220.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p1-1024x752.jpg 1024w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p1-768x564.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p1.jpg 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21954'>\n\t\t\t\tDirector, CSIR-NPL visit at Gas Metrology Wind Tunnel facility (June 2021)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"199\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2-300x199.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21956\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2-300x199.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2-1024x680.jpg 1024w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2-768x510.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2-360x240.jpg 360w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p2.jpg 1160w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21956'>\n\t\t\t\tRelease of Primary Reference Gas Mixture (PRGM) BND 6019; Oxygen in Nitrogen (21 % mol\/mol) on World Metrology Day (20th May 2022)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p3.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"231\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p3-300x231.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21957\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p3-300x231.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p3-1024x789.jpg 1024w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p3-768x592.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p3.jpg 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21957'>\n\t\t\t\tSI unit \u2018mol\u2019 dissemination poster presentation on occasion of National Conclave (4th Jan 2021)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p4.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"209\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p4-300x209.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21958\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p4-300x209.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p4-1024x715.jpg 1024w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p4-768x536.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p4.jpg 1135w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21958'>\n\t\t\t\tInauguration of Wind Tunnel Facility and dedicated to Nation by Hon&#8217;ble Minister Dr. Harsh Vardhan (16th August 2018)\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p6.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"268\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p6-300x268.jpg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p6-300x268.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p6-768x685.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p6.jpg 998w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"199\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5-300x199.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21960\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5-300x199.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5-1024x680.jpg 1024w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5-768x510.jpg 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5-360x240.jpg 360w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p5.jpg 1171w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21960'>\n\t\t\t\tInauguration of CSIR-NPL Gas Metrology developed \u2018High Volume PM2.5 sampler\u2019 technology transferred to Industry by Dr.Harsh Vardhan (August 2018)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p7.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"195\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p7-300x195.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21961\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p7-300x195.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p7.jpg 643w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21961'>\n\t\t\t\tVisit of Dr. Martin J.T. Milton, Director &#8211; BIPM in Gas Metrology Laboratory in 2017\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a data-elementor-open-lightbox=\"no\" href='https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p8.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p8-300x200.jpg\" class=\"attachment-medium size-medium\" alt=\"\" aria-describedby=\"gallery-1-21962\" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p8-300x200.jpg 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p8-360x240.jpg 360w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p8-272x182.jpg 272w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2022\/06\/p8.jpg 685w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-21962'>\n\t\t\t\tGroup photo of APMP Focus Group on Climate Change and Clean Air (FGCCCA) meeting held at CSIR-NPL on November 24, 2017. Gas Metrology Group is one of the members of this FG. \n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_eae_slider has_ma_el_bg_slider elementor-section elementor-top-section elementor-element elementor-element-5223286 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"82679\" data-id=\"5223286\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"has_eae_slider has_ma_el_bg_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6f025fb jltma-glass-effect-no\" data-eae-slider=\"39952\" data-id=\"6f025fb\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9668028 hfe-nav-menu__align-justify hfe-submenu-icon-arrow hfe-submenu-animation-none hfe-link-redirect-child hfe-nav-menu__breakpoint-tablet jltma-glass-effect-no elementor-widget elementor-widget-navigation-menu\" data-id=\"9668028\" data-element_type=\"widget\" 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