{"id":1330,"date":"2021-09-24T09:38:29","date_gmt":"2021-09-24T09:38:29","guid":{"rendered":"https:\/\/www.nplindia.org\/?page_id=1330"},"modified":"2025-12-11T10:25:14","modified_gmt":"2025-12-11T10:25:14","slug":"temperature-and-humidity-metrology-section","status":"publish","type":"page","link":"https:\/\/www.nplindia.in\/index.php\/science-technology\/physico-mechanical-metrology\/temperature-and-humidity-metrology-section\/","title":{"rendered":"Temperature &#038; Humidity Metrology"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1330\" class=\"elementor elementor-1330\">\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-c2af4d9 elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"78820\" data-id=\"c2af4d9\" data-element_type=\"section\">\n\t\t\t\t\t\t<div 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elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"83693\" 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=\"21828\" 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=\"61277\" 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=\"43714\" 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=\"\" 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elementor-element elementor-element-9785487 jltma-glass-effect-no\" data-eae-slider=\"83632\" data-id=\"9785487\" 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-c21e2e8 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=\"c21e2e8\" data-element_type=\"widget\" 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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-dbcd906 jltma-glass-effect-no\" data-eae-slider=\"30476\" data-id=\"dbcd906\" 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-d1b82d7 jltma-glass-effect-no elementor-widget elementor-widget-heading\" data-id=\"d1b82d7\" 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\">Temperature &amp; Humidity 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-2b63c45 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"61279\" data-id=\"2b63c45\" 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-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-3656b72 jltma-glass-effect-no\" data-eae-slider=\"2243\" data-id=\"3656b72\" 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-6bb676e jltma-glass-effect-no elementor-widget elementor-widget-accordion\" data-id=\"6bb676e\" 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<div id=\"elementor-tab-title-1121\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1121\" 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\">Objectives<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1121\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1121\"><p style=\"text-align: justify;\">The unit of temperature at present is defined as a fraction 1\/273.16 of the thermodynamic temperature of triple point of water (TPW). The primary standards of temperature based on TPW and other fixed points called the thermal equilibrium states are well established at NPL as per International Temperature Scale of 1990 (ITS-90) in the form of sealed cells of high purity materials. The temperature scale at NPL from -189 \u00b0C to 962 \u00b0C, (FPs Ar, Hg, Sn, Zn, Al, Ag) is realized by SPRT with uncertainty varying from \u00b10.17 m\u00b0C at TPW (0.01 \u00b0C) to maximum \u00b1 6 m \u00b0C at Ag point (961.78 \u00b0C). In the thermocouple thermometry, the range from 0 \u00b0C to 1554 \u00b0C is realized by standard Type-S &amp; R TCs with uncertainty varying from \u00b10.32 \u00b0C at indium point (In,156.5985 \u00b0C) to \u00b1 0.5 \u00b0C at Palladium point (Pd,1554 \u00b0C). The radiation temperature scale has been established by installing photoelectric linear pyrometer, LP4 and realizing the silver point (Ag, 961.78 \u00b0C) and copper point (Cu, 1084.62 \u00b0C) in the form of metal-in-graphite blackbodies with an uncertainty better than \u00b1 0.5 \u00b0C. The high temperature range from 800 \u00b0C to 2200 \u00b0C is thus maintained by transfer standard lamps using LP4 pyrometer with uncertainty varying from \u00b1 0.9 \u00b0C to \u00b1 2.5 \u00b0C while the total radiation infrared thermometry is available in the range from 50 \u00baC to 3000 \u00baC. The apex level calibration in temperature metrology is available in the laboratory in the range from -200 \u00b0C to 3000 \u00b0C.<\/p><div id=\"attachment_1474\" style=\"width: 501px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-1474\" src=\"https:\/\/www.getinfo.global\/wp-content\/uploads\/2021\/09\/1-e1632489751747-300x130.png\" alt=\"\" width=\"491\" height=\"213\" class=\"wp-image-1474 \" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/1-e1632489751747-300x130.png 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/1-e1632489751747-768x332.png 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/1-e1632489751747.png 802w\" sizes=\"(max-width: 491px) 100vw, 491px\" \/><p id=\"caption-attachment-1474\" class=\"wp-caption-text\"><b>Realization of Triple Point of Water (TPW) &amp; Set-up for Primary Standard Fixed Points by using SPRT<\/b><\/p><\/div><div id=\"attachment_1475\" style=\"width: 635px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1475\" src=\"https:\/\/www.getinfo.global\/wp-content\/uploads\/2021\/09\/2-2-e1632489892898-300x97.png\" alt=\"\" width=\"625\" height=\"202\" class=\"wp-image-1475 \" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/2-2-e1632489892898-300x97.png 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/2-2-e1632489892898-768x250.png 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/2-2-e1632489892898.png 828w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><p id=\"caption-attachment-1475\" class=\"wp-caption-text\"><b>Set-up for Realization of Ag (961.78 \u00b0C) &amp; Cu (1084.62 \u00b0C) Points by Photoelectric Radiation Pyrometer, LP4<\/b><\/p><\/div><div id=\"attachment_1476\" style=\"width: 567px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1476\" src=\"https:\/\/www.getinfo.global\/wp-content\/uploads\/2021\/09\/3-e1632489969688-300x124.png\" alt=\"\" width=\"557\" height=\"230\" class=\"wp-image-1476 \" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/3-e1632489969688-300x124.png 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/3-e1632489969688-768x317.png 768w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/3-e1632489969688.png 861w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><p id=\"caption-attachment-1476\" class=\"wp-caption-text\"><b>Set-up for calibration of noble metal Standard Thermocouples (Type-S, R &amp; B) (By Fixed Points and Comparison methods)<\/b><\/p><\/div><div id=\"attachment_1477\" style=\"width: 514px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1477\" src=\"https:\/\/www.getinfo.global\/wp-content\/uploads\/2021\/09\/4-e1632490066340-300x139.png\" alt=\"\" width=\"504\" height=\"233\" class=\"wp-image-1477 \" srcset=\"https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/4-e1632490066340-300x139.png 300w, https:\/\/www.nplindia.in\/wp-content\/uploads\/2021\/09\/4-e1632490066340.png 572w\" sizes=\"(max-width: 504px) 100vw, 504px\" \/><p id=\"caption-attachment-1477\" class=\"wp-caption-text\"><b>Measurement Set-up for Co-C and Fe-C Eutectic Fixed Points for High Precision Thermocouples<\/b><\/p><\/div><p style=\"text-align: justify; line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\"><o:p><\/o:p><\/p><div id=\"attachment_29854\" style=\"width: 210px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-29854\" src=\"https:\/\/www.nplindia.org\/wp-content\/uploads\/2023\/06\/5-1.jpg\" alt=\"\" width=\"200\" height=\"237\" class=\"size-full wp-image-29854\" \/><p id=\"caption-attachment-29854\" class=\"wp-caption-text\">High Temperature Black Body Source up to 3000 \u00b0C<\/p><\/div><\/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<div id=\"elementor-tab-title-1122\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1122\" 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\">Highlights of Achievements<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1122\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1122\"><ul><li style=\"text-align: justify;\">High temperature facility has been created in the fields of eutectic fixed point of Co-C and Fe-C using pure metal thermocouple at a temperature of 1400 \u00b0C. Fixed point cells of high purity graphite have been designed and fabricated and developed in the laboratory for realization of the fixed point using precision thermocouples.<\/li><li style=\"text-align: justify;\">Calibration set-up for infrared thermometers and thermal imagers has been established by procuring a large temperature range blackbody source operated for temperature range from 600 \u00b0C to 3000 \u00b0C. This unique facility has been set up first time in the laboratory to support industries and laboratories for apex calibration on non-contact means of temperature calibration.<\/li><li style=\"text-align: justify;\">Primary standards for high temperature calibration by spectral radiation pyrometry has been set up by installing a photoelectric radiation linear pyrometer, LP4 developed by m\/s KE Technologies, Germany. Fixed points of silver (Ag, 961.78 \u00b0C) and copper (Cu, 1084.62 \u00b0C) in the form of metal-in-graphite black bodies of these materials have been realized with significant precision of the order of \u00b10.05 \u00b0C. The facility is ready to calibrate high temperature tungsten lamps and optical pyrometers in the range from 800 \u00b0C to 2200 \u00b0C.<\/li><li style=\"text-align: justify;\">Calibration facility for hygrometers has been set-up by procuring new humidity generator of Thunder Scientific-2500 based on temperature-pressure parameters with significant stability of better than 0.1% and capable of providing calibration in the range 10% to 95% RH with an uncertainty of 0.3% RH.<\/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<div id=\"elementor-tab-title-1123\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1123\" 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\">Traceability of Temperature & Humidity Standards<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1123\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1123\"><p style=\"text-align: justify;\">The Temperature &amp; Humidity Standards Group maintains the primary and secondary standards as per procedures of the International Temperature Scale of 1990 (ITS-90) and establishes the mutual compatibility of temperature standards within the country through international comparisons of APMP regional programs. Various proficiency testing programs (PT-Program) were organized by the Group in LIGTs and TCs in collaboration with NABL to disseminate the traceability of the laboratory to the NABL accredited laboratories and user industry as a part of metrology service to the nation.<\/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<div id=\"elementor-tab-title-1124\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1124\" 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\">Specific and Significant Facilities for Users<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1124\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1124\"><p>1.\u00a0 <strong>Calibration Facilities<\/strong><\/p><p>Apex level calibration facilities are available in the temperature and humidity standards for specific instruments like SPRTs, noble metal Thermocouples, precision LIGTs, Optical total radiation and infrared pyrometers, Tungsten lamps, thermal imagers in the range from -200 \u00b0C to 3000 \u00b0C and hygrometers in the range 10% to 95% RH.<\/p><p>2.\u00a0 <strong>Consultancy Service to Industry<\/strong>:<\/p><p style=\"padding-left: 40px;\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Characterization of thermal comparison sources<\/p><p style=\"padding-left: 40px;\">\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Establishing calibration laboratories<\/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<div id=\"elementor-tab-title-1125\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1125\" 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\">Contact Person<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1125\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1125\"><p><a href=\"\/wp-content\/uploads\/2022\/08\/shivagan@nplindia.pdf\" target=\"_blank\" rel=\"noopener\"><strong>Dr. D. D. Shivagan<\/strong><\/a><br \/><span>Sr. Principal Scientist &amp; Head<\/span><br \/><span>Temperature and Humidity Metrology Section<\/span><br \/>Email:<span>\u00a0<\/span>shivagand<span>.nplindia@csir.res.in<\/span><br \/>Phone :<span>\u00a0+91 1147091379<\/span><\/p><\/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-1168b7b elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"60608\" data-id=\"1168b7b\" 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-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-29f1c6c jltma-glass-effect-no\" data-eae-slider=\"56704\" data-id=\"29f1c6c\" 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-2b20b02 jltma-glass-effect-no elementor-widget elementor-widget-heading\" data-id=\"2b20b02\" 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<h6 class=\"elementor-heading-title elementor-size-default\">Existing Apex Calibration Facilities<\/h6>\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-3b3cfb4 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"43661\" data-id=\"3b3cfb4\" 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-c9ac02c jltma-glass-effect-no\" data-eae-slider=\"69363\" data-id=\"c9ac02c\" 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-3227a18 jltma-glass-effect-no elementor-widget elementor-widget-htmega-datatable-addons\" data-id=\"3227a18\" data-element_type=\"widget\" data-widget_type=\"htmega-datatable-addons.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"htmega-table-style htmega-table-style-3 htb-table-responsive\">\n            <table class=\"htb-table \">\n                                    <thead>\n                        <tr>\n                            <th class='elementor-repeater-item-34ec399'>Facility<\/th><th class='elementor-repeater-item-fd6a07f'>Instruments<\/th><th class='elementor-repeater-item-8946048'>Temperature Range<\/th>                        <\/tr>\n                    <\/thead>\n                                <tbody>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-53a18f4\" >Primary Standards Fixed Points and SPRTs<\/td><td class=\"elementor-repeater-item-c4cbc1c\" >SPRTs with Fixed points of TPAr, TPHg, TPW, Ga, In, Sn, Zn, Al, and Ag with high Precision Resistance Bridge<\/td><td class=\"elementor-repeater-item-4080fda\" >-189 \u00b0C to 0.01 \u00b0C 0.01 \u00b0C to 660 \u00b0C and 660 \u00b0C to 962 \u00b0C<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-7fd902a\" >Primary Standards Fixed Points and Spectral Photoelectric Radiation pyrometers<\/td><td class=\"elementor-repeater-item-b5fc937\" >Fixed point blackbodies of Ag and Cu with Spectral Photoelectric Linear Pyrometer, LP4 and heat pipe Blackbody Source<\/td><td class=\"elementor-repeater-item-dff5587\" >962 \u00b0C &amp; 1084 \u00b0C 800 \u00b0C to 2200 \u00b0C 50 \u00b0C to 1300 \u00b0C and 600 \u00b0C to 3000 \u00b0C<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-b2a41f6\" >Thermocouple Thermometry (TC) (Noble metal TCs), Fixed Points &amp; Comparison<\/td><td class=\"elementor-repeater-item-2a287c8\" >Fixed points of  In, Sn, Zn, Al, Ag, Cu and Pd with Type-S &amp; R &amp; B TCs and Precision DVM using high stability Furnaces<\/td><td class=\"elementor-repeater-item-418c1bb\" >0 \u00b0C to 1554 \u00b0C 0 \u00b0C to 1200 \u00b0C and 0 \u00b0C  to 1600 \u00b0C<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-e35449a\" >Liquid-in-Glass Thermometry (LIGT)<\/td><td class=\"elementor-repeater-item-2f08a17\" >SPRTs with Precision Resistance Bridge and High stability Liquid baths\/Fluidized Bed Bath<\/td><td class=\"elementor-repeater-item-77544f7\" >-90 \u00b0C to 300 \u00b0C and 300 \u00b0C to 500 \u00b0C<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-133ddc1\" >Hygrometry<\/td><td class=\"elementor-repeater-item-9928c1c\" >2500-Thunder Scientific Humidity Generator<\/td><td class=\"elementor-repeater-item-a082c05\" >10 % to 95%<\/td>                        <\/tr>\n                                    <\/tbody>\n            <\/table>\n        <\/div>\n        \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-a6aaf66 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"43772\" data-id=\"a6aaf66\" 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-f6fb6cd jltma-glass-effect-no\" data-eae-slider=\"72221\" data-id=\"f6fb6cd\" 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-2f7ea4f jltma-glass-effect-no elementor-widget elementor-widget-heading\" data-id=\"2f7ea4f\" 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<h6 class=\"elementor-heading-title elementor-size-default\">Participation in the International Key Comparisons<\/h6>\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-ab725ee elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"57817\" data-id=\"ab725ee\" 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-bba1127 jltma-glass-effect-no\" data-eae-slider=\"39086\" data-id=\"bba1127\" 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-c443c1a jltma-glass-effect-no elementor-widget elementor-widget-htmega-datatable-addons\" data-id=\"c443c1a\" data-element_type=\"widget\" data-widget_type=\"htmega-datatable-addons.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"htmega-table-style htmega-table-style-3 htb-table-responsive\">\n            <table class=\"htb-table \">\n                                    <thead>\n                        <tr>\n                            <th class='elementor-repeater-item-33b0fe9'>S.No.<\/th><th class='elementor-repeater-item-18417dd'>Key Comparison<\/th><th class='elementor-repeater-item-436b3cd'>Parameter &amp; Range<\/th><th class='elementor-repeater-item-1d92fa8'>Remarks\/comments<\/th>                        <\/tr>\n                    <\/thead>\n                                <tbody>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-a770582\" >1<\/td><td class=\"elementor-repeater-item-df5457a\" >SADC-Met, 2000-02<\/td><td class=\"elementor-repeater-item-f5d6e11\" >LIGT, 0 to 50 \u00b0C<\/td><td class=\"elementor-repeater-item-88d1574\" >Satisfactory completed<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-db5442e\" >2<\/td><td class=\"elementor-repeater-item-25696ac\" >APMP-S-T7, 2006-07<\/td><td class=\"elementor-repeater-item-d7fd305\" >S-TC, 0 to 1100 \u00b0C<\/td><td class=\"elementor-repeater-item-7985651\" >Satisfactory completed<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-8403440\" >3<\/td><td class=\"elementor-repeater-item-6945c82\" >APMP-KC-3, 2000-01<\/td><td class=\"elementor-repeater-item-c238765\" >Hg, TPW, Ga, Zn by SPRT<\/td><td class=\"elementor-repeater-item-472ab3d\" >Ga qualified, Results awaited<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-ac642ae\" >4<\/td><td class=\"elementor-repeater-item-5216a2c\" >APMP-TK-4, 2005-06<\/td><td class=\"elementor-repeater-item-fc1c860\" >Al and Ag by SPRT<\/td><td class=\"elementor-repeater-item-f2a4feb\" >Final draft 2013<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-30f4f09\" >5<\/td><td class=\"elementor-repeater-item-17d3535\" >APMP-T-Pt\/Pd, 2012-13<\/td><td class=\"elementor-repeater-item-d3acc1e\" >Pt\/Pd TC, Co-C point   (1324 \u00b0C)<\/td><td class=\"elementor-repeater-item-8f95e29\" >Under comparison<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-bd0a7e3\" >6<\/td><td class=\"elementor-repeater-item-769589c\" >APMP\/DEC<\/td><td class=\"elementor-repeater-item-5601d93\" >LIGT, 0-250 \u00b0C<\/td><td class=\"elementor-repeater-item-c22ad8b\" >Under process<\/td>                        <\/tr>\n                                    <\/tbody>\n            <\/table>\n        <\/div>\n        \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-cc77576 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"53471\" data-id=\"cc77576\" 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-5d75703 jltma-glass-effect-no\" data-eae-slider=\"40628\" data-id=\"5d75703\" 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-fffceed jltma-glass-effect-no elementor-widget elementor-widget-heading\" data-id=\"fffceed\" 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<h6 class=\"elementor-heading-title elementor-size-default\">CMCs Published in the KCDB, BIPM France<\/h6>\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-126fc76 elementor-section-boxed elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"65233\" data-id=\"126fc76\" 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-f235323 jltma-glass-effect-no\" data-eae-slider=\"86385\" data-id=\"f235323\" 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-51f9d56 jltma-glass-effect-no elementor-widget elementor-widget-htmega-datatable-addons\" data-id=\"51f9d56\" data-element_type=\"widget\" data-widget_type=\"htmega-datatable-addons.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"htmega-table-style htmega-table-style-3 htb-table-responsive\">\n            <table class=\"htb-table \">\n                                    <thead>\n                        <tr>\n                            <th class='elementor-repeater-item-d6245ae'>Quantity<\/th><th class='elementor-repeater-item-4b6faf9'>Instrument<\/th><th class='elementor-repeater-item-f7d7b0d'>Method<\/th><th class='elementor-repeater-item-fb11948'>Range<\/th><th class='elementor-repeater-item-7c7a247'>Value<\/th><th class='elementor-repeater-item-38e8fd7'>Cover. Factor, k<\/th><th class='elementor-repeater-item-e56feb4'>Confid.Level<\/th><th class='elementor-repeater-item-42cd273'>NMI Service provider<\/th><th class='elementor-repeater-item-631e5b8'>Comments<\/th>                        <\/tr>\n                    <\/thead>\n                                <tbody>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-d0cc058\" >Temperature<\/td><td class=\"elementor-repeater-item-499808e\" >Stem SPRT<\/td><td class=\"elementor-repeater-item-94f13e1\" >Ga Point<\/td><td class=\"elementor-repeater-item-9aef848\" >29.7646 \u00b0C<\/td><td class=\"elementor-repeater-item-e3c2341\" >1.36 mK<\/td><td class=\"elementor-repeater-item-6729c7c\" >2<\/td><td class=\"elementor-repeater-item-c772ba8\" >95%<\/td><td class=\"elementor-repeater-item-e1a1028\" >NPLI\/T13<\/td><td class=\"elementor-repeater-item-7da73ab\" >March 2011<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-e7d56b1\" >Temperature<\/td><td class=\"elementor-repeater-item-d3c5ac4\" >LIGT, 0.05 \u00b0C<\/td><td class=\"elementor-repeater-item-b679ab0\" >Water Bath<\/td><td class=\"elementor-repeater-item-1d30c0f\" >5 to 95 \u00b0C<\/td><td class=\"elementor-repeater-item-d9b670e\" >0.03 \u00b0C<\/td><td class=\"elementor-repeater-item-3805fff\" >2<\/td><td class=\"elementor-repeater-item-0eea91d\" >95%<\/td><td class=\"elementor-repeater-item-32e7f00\" >NPLI\/T16<\/td><td class=\"elementor-repeater-item-e16e9db\" >March 2011<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-614dbfe\" >Temperature<\/td><td class=\"elementor-repeater-item-09e30e3\" >\tLIGT, 0.05 \u00b0C<\/td><td class=\"elementor-repeater-item-028bd6d\" >Oil bath<\/td><td class=\"elementor-repeater-item-49c5ba8\" >95 to 200 \u00b0C<\/td><td class=\"elementor-repeater-item-dbda732\" >0.04 \u00b0C<\/td><td class=\"elementor-repeater-item-cefcb4b\" >2<\/td><td class=\"elementor-repeater-item-b4a31b4\" >95%<\/td><td class=\"elementor-repeater-item-9829edc\" >NPLI\/T17<\/td><td class=\"elementor-repeater-item-b2df8d3\" >March 2011<\/td>                        <\/tr>\n                                            <tr>\n                            <td class=\"elementor-repeater-item-5305118\" >Temperature<\/td><td class=\"elementor-repeater-item-3a6504b\" >IPRTS<\/td><td class=\"elementor-repeater-item-b0dca3b\" >Oil bath &amp; TPW cell<\/td><td class=\"elementor-repeater-item-cc15ec8\" >01 to 100 \u00b0C<\/td><td class=\"elementor-repeater-item-55749a5\" >4-15 mK<\/td><td class=\"elementor-repeater-item-9fcfd20\" >2<\/td><td class=\"elementor-repeater-item-560fdd3\" >95%<\/td><td class=\"elementor-repeater-item-ff19786\" >NPLI\/T12<\/td><td class=\"elementor-repeater-item-8c08012\" >March 2011<\/td>                        <\/tr>\n                                    <\/tbody>\n            <\/table>\n        <\/div>\n        \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-2c0e75f elementor-section-full_width elementor-section-height-default elementor-section-height-default jltma-glass-effect-no\" data-eae-slider=\"54723\" data-id=\"2c0e75f\" 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-9763af8 jltma-glass-effect-no\" data-eae-slider=\"66572\" data-id=\"9763af8\" 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-a7f1a43 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=\"a7f1a43\" data-element_type=\"widget\" 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