{"product_id":"spectral-irradiance-meters","title":"Spectral Irradiance Meters","description":"\u003cstyle\u003e\n  .sri-selector { font-family: 'Segoe UI', Arial, sans-serif; max-width: 900px; margin: 0 auto; }\n  .sri-selector h2 { color: #1a3a5c; border-bottom: 2px solid #1a3a5c; padding-bottom: 10px; margin-top: 30px; }\n  .sri-selector h3 { color: #2c5282; margin-top: 25px; }\n  .sri-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; margin: 20px 0; }\n  .sri-card { border: 1px solid #e2e8f0; border-radius: 8px; padding: 18px; background: #fff; transition: box-shadow 0.2s; }\n  .sri-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.1); }\n  .sri-card .model { font-size: 18px; font-weight: bold; color: #1a3a5c; margin-bottom: 8px; }\n  .sri-card .tag { display: inline-block; background: #edf2f7; color: #4a5568; font-size: 12px; padding: 3px 10px; border-radius: 12px; margin-bottom: 10px; }\n  .sri-card ul { list-style: none; padding: 0; margin: 0; font-size: 14px; color: #4a5568; }\n  .sri-card ul li { padding: 4px 0; border-bottom: 1px dotted #e2e8f0; }\n  .sri-card ul li:last-child { border-bottom: none; }\n  .sri-card .highlight { color: #c53030; font-weight: 600; }\n  .sri-flow { background: #f7fafc; border-left: 4px solid #1a3a5c; padding: 20px; margin: 20px 0; border-radius: 0 8px 8px 0; }\n  .sri-flow ol { margin: 0; padding-left: 20px; }\n  .sri-flow li { margin: 10px 0; color: #2d3748; }\n  .sri-note { background: #fffaf0; border: 1px solid #fbd38d; padding: 15px; border-radius: 6px; margin: 20px 0; font-size: 14px; color: #744210; }\n  .sri-cta { text-align: center; margin: 30px 0; }\n  .sri-cta a { display: inline-block; background: #1a3a5c; color: #fff; padding: 14px 32px; text-decoration: none; border-radius: 6px; font-weight: 600; font-size: 15px; }\n  .sri-cta a:hover { background: #2c5282; }\n  .sri-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }\n  .sri-table th { background: #1a3a5c; color: #fff; padding: 12px; text-align: left; }\n  .sri-table td { padding: 12px; border-bottom: 1px solid #e2e8f0; }\n  .sri-table tr:nth-child(even) { background: #f7fafc; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"sri-selector\"\u003e\n\n\u003ch2\u003eSRI Series Spectral Irradiance Meters\u003c\/h2\u003e\n\u003cp\u003eSRI (Spectral Radiometer Irradiance) series measures absolute spectral irradiance across UV, VIS, and NIR ranges. Built on high-performance spectrometer sensors, each model is optimized for specific wavelength bands and light intensity levels.\u003c\/p\u003e\n\n\u003ch3\u003eStep 1: What wavelength do you need to measure?\u003c\/h3\u003e\n\u003cdiv class=\"sri-flow\"\u003e\n  \u003col\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUV region (200–400 nm)\u003c\/strong\u003e → SRI\u003cstrong\u003e40\u003c\/strong\u003e series (general) or SRI\u003cstrong\u003e68\u003c\/strong\u003e series (cooled, ultra-low light)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVIS region (350–950 nm)\u003c\/strong\u003e → SRI\u003cstrong\u003e50\u003c\/strong\u003e series (general) or SRI\u003cstrong\u003e63\u003c\/strong\u003e series (cooled, low-light)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUV-VIS broadband\u003c\/strong\u003e → Contact us for SRI50-UV or custom configuration\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eStep 2: How bright is your light source?\u003c\/h3\u003e\n\u003cdiv class=\"sri-flow\"\u003e\n  \u003col\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStandard brightness\u003c\/strong\u003e (mW\/cm² to W\/cm² range) → General spectrometer, no cooling needed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLow-light\u003c\/strong\u003e (μW\/cm² range) → Cooled spectrometer (SRI63 \/ SRI68) for noise reduction\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUltra-low \/ photon-counting\u003c\/strong\u003e → Deep-cooled detector with extended integration time\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eQuick Selection Guide\u003c\/h3\u003e\n\u003cdiv class=\"sri-grid\"\u003e\n  \u003cdiv class=\"sri-card\"\u003e\n    \u003cdiv class=\"model\"\u003eSRI40-UV\u003c\/div\u003e\n    \u003cdiv class=\"tag\"\u003eUV Standard\u003c\/div\u003e\n    \u003cul\u003e\n      \u003cli\u003e200–400 nm\u003c\/li\u003e\n      \u003cli\u003eStandard irradiance\u003c\/li\u003e\n      \u003cli\u003eGeneral spectrometer\u003c\/li\u003e\n      \u003cli class=\"highlight\"\u003eArc flash detection\u003c\/li\u003e\n      \u003cli\u003eUV curing validation\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"sri-card\"\u003e\n    \u003cdiv class=\"model\"\u003eSRI50-VIS\u003c\/div\u003e\n    \u003cdiv class=\"tag\"\u003eVIS Standard\u003c\/div\u003e\n    \u003cul\u003e\n      \u003cli\u003e350–950 nm\u003c\/li\u003e\n      \u003cli\u003eStandard illuminance\u003c\/li\u003e\n      \u003cli\u003eGeneral spectrometer\u003c\/li\u003e\n      \u003cli class=\"highlight\"\u003eLighting quality (CCT\/CRI)\u003c\/li\u003e\n      \u003cli\u003eDisplay calibration\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"sri-card\"\u003e\n    \u003cdiv class=\"model\"\u003eSRI63-LL\u003c\/div\u003e\n    \u003cdiv class=\"tag\"\u003eLow-Light Cooled\u003c\/div\u003e\n    \u003cul\u003e\n      \u003cli\u003e350–950 nm\u003c\/li\u003e\n      \u003cli\u003eLow irradiance level\u003c\/li\u003e\n      \u003cli\u003eCooled spectrometer\u003c\/li\u003e\n      \u003cli class=\"highlight\"\u003eBioluminescence\u003c\/li\u003e\n      \u003cli\u003eWeak LED characterization\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"sri-card\"\u003e\n    \u003cdiv class=\"model\"\u003eSRI68-UVL\u003c\/div\u003e\n    \u003cdiv class=\"tag\"\u003eUltra-Low UV Cooled\u003c\/div\u003e\n    \u003cul\u003e\n      \u003cli\u003e200–400 nm\u003c\/li\u003e\n      \u003cli\u003eUltra-low irradiance\u003c\/li\u003e\n      \u003cli\u003eDeep-cooled detector\u003c\/li\u003e\n      \u003cli class=\"highlight\"\u003ePhoton-counting UV\u003c\/li\u003e\n      \u003cli\u003eResearch-grade UV-VIS\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"sri-note\"\u003e\n  \u003cstrong\u003eRule of thumb:\u003c\/strong\u003e The second digit indicates detector class — \u003cstrong\u003e4x\/5x\u003c\/strong\u003e = general (room-temperature), \u003cstrong\u003e6x\u003c\/strong\u003e = cooled. The higher the number, the lower the detectable light level. For arc flash UV detection at standard intensity, \u003cstrong\u003eSRI40-UV\u003c\/strong\u003e is the right choice.\n\u003c\/div\u003e\n\n\u003ch3\u003eFull Comparison Table\u003c\/h3\u003e\n\u003ctable class=\"sri-table\"\u003e\n  \u003ctr\u003e\n    \u003cth\u003eModel\u003c\/th\u003e\n    \u003cth\u003eWavelength\u003c\/th\u003e\n    \u003cth\u003eDetector\u003c\/th\u003e\n    \u003cth\u003eIrradiance Range\u003c\/th\u003e\n    \u003cth\u003eBest For\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e\u003cstrong\u003eSRI40-UV\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd\u003e200–400 nm\u003c\/td\u003e\n    \u003ctd\u003eGeneral\u003c\/td\u003e\n    \u003ctd\u003eStandard UV\u003c\/td\u003e\n    \u003ctd\u003eArc flash, UV safety, curing\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e\u003cstrong\u003eSRI50-VIS\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd\u003e350–950 nm\u003c\/td\u003e\n    \u003ctd\u003eGeneral\u003c\/td\u003e\n    \u003ctd\u003eStandard VIS\u003c\/td\u003e\n    \u003ctd\u003eLighting CCT\/CRI, lux meters\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e\u003cstrong\u003eSRI63-LL\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd\u003e350–950 nm\u003c\/td\u003e\n    \u003ctd\u003eCooled\u003c\/td\u003e\n    \u003ctd\u003eLow-light\u003c\/td\u003e\n    \u003ctd\u003eBioluminescence, weak sources\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e\u003cstrong\u003eSRI68-UVL\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd\u003e200–400 nm\u003c\/td\u003e\n    \u003ctd\u003eDeep-cooled\u003c\/td\u003e\n    \u003ctd\u003eUltra-low UV\u003c\/td\u003e\n    \u003ctd\u003eResearch, photon-counting\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"sri-cta\"\u003e\n  \u003ca href=\"mailto:sales@nwspec.com?subject=SRI%20Series%20Selection%20Inquiry\"\u003eRequest a Quote — Tell Us Your Application\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"NWSPEC","offers":[{"title":"Default Title","offer_id":47609421496539,"sku":"1022","price":3692.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/1722\/0315\/files\/NWH1022SpectralIlluminanceTester.jpg?v=1758256885","url":"https:\/\/nwspec.com\/products\/spectral-irradiance-meters","provider":"NWSPEC","version":"1.0","type":"link"}