{"id":9224,"date":"2024-07-17T05:38:52","date_gmt":"2024-07-17T05:38:52","guid":{"rendered":"https:\/\/eko-instruments.com\/us\/product\/ms-21-pyrgeometer-2\/"},"modified":"2025-07-18T14:58:09","modified_gmt":"2025-07-18T14:58:09","slug":"ms-21-pyrgeometer","status":"publish","type":"product","link":"https:\/\/eko-instruments.com\/us\/product\/ms-21-pyrgeometer\/","title":{"rendered":"MS-21 Pyrgeometer"},"content":{"rendered":"<p>Designed to raise the bar, the MS-21 Pyrgeometer is research-grade, accurate, robust and delivers superior stability independent of the sensors\u2019 operating temperature. Based on a new design concept and built for consistency, the MS-21 minimise temperature differences and suppresses window heating errors.<\/p>\n<p>Whatever the conditions, the MS-21 measures longwave downwelling radiation and longwave net radiation in a wide spectral band without needing a sun tracker with a shading device or shadow ring. It features a silicon meniscus dome with solar blind interference filter and hard carbon coating, a new thermal coupling design, onboard temperature compensating electronics, and a unique aluminium alloy sun shield.<\/p>\n<p>With a 5-year Warranty, World Infrared Standard Group (WISG) traceable calibration, and PT-100\/4W IEC60751 Class A Industrial platinum resistance thermometers and temperature sensors; the MS-21 achieves the highest standards for quality, accuracy, and reliability.<\/p>\n<p>&nbsp;<\/p>\n<p>Key Features:<\/p>\n<p>&nbsp;<\/p>\n<ul class=\"f-list product-features-list\">\n<li>NEW thermal coupling design, outstanding low thermal resistance<\/li>\n<li>WISG traceable calibration<\/li>\n<li>4.5\u00b5m &#8211; 42\u00b5m flat spectral response<\/li>\n<li>Low temperature dependency, excellent stability<\/li>\n<li>Designed &amp; built for ultra-low window heating<\/li>\n<li>5-year warranty &amp; EKO quality guarantee<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Research-grade, accurate, and robust, the MS-21 measures longwave downwelling radiation and longwave net radiation in a wide spectral band and delivers superior stability independent of the sensors\u2019 operating temperature.<\/p>\n","protected":false},"featured_media":8021,"comment_status":"open","ping_status":"closed","template":"","meta":{"content-type":""},"product_cat":[220],"product_tag":[],"class_list":{"0":"post-9224","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-pyrgeometers","7":"product_type_cat-instruments","9":"first","10":"instock","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>MS-21 Pyrgeometer \u2013 High-Accuracy ISO-Class A Longwave Sensor<\/title>\n<meta name=\"description\" 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