{"product_id":"electronics-india-681-digital-photo-fluorometer","title":"Electronics India 681 Digital Photo Fluorometer","description":"\u003cdiv class=\"powr-chat\" id=\"1abb102c_1753877895\"\u003e\u003c\/div\u003e\n\u003ch2\u003eElectronics India 681 Digital Photo Fluorometer\u003c\/h2\u003e\nThe Electronics India Model 681 Digital Photo Fluorometer is a precision analytical instrument specifically designed for the accurate detection and measurement of fluorophors including vitamins, quinine, steroids, fluorescein, and metal complexes. This laboratory-grade fluorometer utilizes advanced optical design with 90-degree detection geometry to minimize excitation interference and maximize sensitivity. Built to exacting standards by an ISO 9001-2000 certified manufacturer, this instrument delivers reliable performance for research laboratories, quality control facilities, and educational institutions.\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eHigh Sensitivity Detection\u003c\/strong\u003e - Full scale deflection with just 1 ppm quinine sulphate in 0.1 N sulphuric acid\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003e90° Detection Angle\u003c\/strong\u003e - Optimized geometry minimizes excitation interference for cleaner signals\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eComprehensive Filter Set\u003c\/strong\u003e - Includes multiple primary and secondary filters for diverse applications\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eClear Digital Readout\u003c\/strong\u003e - 3-digit 7-segment red LED display for easy reading of results\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eAdjustable Sensitivity\u003c\/strong\u003e - Four sensitivity ranges for measurement flexibility\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eComplete Visible Range Coverage\u003c\/strong\u003e - Suitable for various fluorescent compound analysis\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePowerful Light Source\u003c\/strong\u003e - 12V, 50W tungsten halogen lamp for reliable excitation\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSensitive Photodetector\u003c\/strong\u003e - High-performance photodiode\/photocell for accurate measurements\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eMinimal Sample Requirement\u003c\/strong\u003e - Only 4ml sample volume needed for analysis\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eCompact Design\u003c\/strong\u003e - Space-efficient footprint for laboratory benchtops\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eISO 9001-2000 Certified Quality\u003c\/strong\u003e - Manufactured to international quality standards\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003e1-Year Warranty\u003c\/strong\u003e - Manufacturer guarantee on parts and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eScientific Principle\u003c\/h3\u003e\nThe Electronics India 681 Digital Photo Fluorometer operates on the fundamental principle of fluorescence spectroscopy:\n\u003col\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eExcitation\u003c\/strong\u003e - The sample containing fluorophores absorbs radiant energy at a specific wavelength determined by the primary filter\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eElectronic Transition\u003c\/strong\u003e - Molecules in the sample transition to an excited state\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eEmission\u003c\/strong\u003e - The excited molecules return to ground state, re-emitting some energy as light at a longer wavelength\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDetection\u003c\/strong\u003e - This emitted light passes through a secondary filter and is measured by the photodetector at a 90-degree angle from the excitation source\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eQuantification\u003c\/strong\u003e - The intensity of emitted light is directly proportional to the concentration of fluorophores in the sample\u003c\/li\u003e\n\u003c\/ol\u003e\nThis fluorometric method offers substantially higher sensitivity than traditional colorimetric approaches, allowing for detection of compounds at much lower concentrations.\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003eOptical System\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Geometry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90-degree angle measurement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLight Source\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12V, 50W Tungsten Halogen lamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Filters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCorning 5840 and Corning 5113 (mounted on holders)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSecondary Filters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCorning 4308, Corning 3486, and Corning 3385 (mounted on holders)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHighly sensitive wide range Photodiode\/Photocell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpectral Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCovers entire visible range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003ePerformance Specifications Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFluorometric Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull scale deflection obtained with 1 ppm quinine sulphate in 0.1 N sulphuric acid (primary wavelength 360 nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensitivity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable in 4 ranges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Sample Volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSample Container\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTest tubes 15 mm (D) × 80 mm (H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003ePhysical Specifications Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-digit 7-segment Red LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (L×B×H)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e260 × 335 × 160 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.5 Kg (approximately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e230 V ± 10% AC, 50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eApplications Electronics India 681 Digital Photo Fluorometer\u003c\/h3\u003e\nThe Electronics India 681 Digital Photo Fluorometer is suitable for a wide range of applications across multiple fields:\n\u003ch4\u003eBiochemical Analysis\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eVitamin Determination\u003c\/strong\u003e - Quantification of fluorescent vitamins including riboflavin (B2), thiamine (B1)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eEnzyme Studies\u003c\/strong\u003e - Analysis of fluorescent enzyme substrates and products\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eProtein Analysis\u003c\/strong\u003e - Detection of proteins using fluorescent tags\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSteroid Measurement\u003c\/strong\u003e - Quantification of fluorescent steroids and hormones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePharmaceutical Applications Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDrug Analysis\u003c\/strong\u003e - Quantification of fluorescent pharmaceutical compounds\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eQuality Control\u003c\/strong\u003e - Verification of active ingredient concentrations\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eFormulation Testing\u003c\/strong\u003e - Analysis of pharmaceutical preparations\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eResearch \u0026amp; Development\u003c\/strong\u003e - Support for drug discovery and development\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEnvironmental Analysis Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eWater Quality Testing\u003c\/strong\u003e - Detection of fluorescent pollutants and contaminants\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePetroleum Detection\u003c\/strong\u003e - Identification of oil and petroleum products in water\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDye Tracing\u003c\/strong\u003e - Monitoring of water flow and contamination pathways\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eMetal Complex Analysis\u003c\/strong\u003e - Measurement of metal ions using fluorescent complexing agents\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eEducational Applications Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eTeaching Laboratories\u003c\/strong\u003e - Demonstration of fluorescence principles\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eStudent Research\u003c\/strong\u003e - Support for undergraduate and graduate projects\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eAnalytical Chemistry Training\u003c\/strong\u003e - Practical instruction in fluorescence techniques\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eMethod Development\u003c\/strong\u003e - Exploration of new analytical procedures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvantages of Fluorometric Analysis Electronics India 681 Digital Photo Fluorometer\u003c\/h3\u003e\nThe fluorometric method employed by the Model 681 offers several significant advantages over other analytical techniques:\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSuperior Sensitivity\u003c\/strong\u003e - Typically 10-1000 times more sensitive than colorimetric methods\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eImproved Selectivity\u003c\/strong\u003e - Dual wavelength selection (excitation and emission) provides greater specificity\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eLower Detection Limits\u003c\/strong\u003e - Capable of measuring compounds at parts-per-billion levels\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eWider Linear Range\u003c\/strong\u003e - Broader concentration range for quantitative analysis\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eMinimal Sample Volume\u003c\/strong\u003e - Requires only 4ml of sample for analysis\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eNon-Destructive Technique\u003c\/strong\u003e - Sample can often be recovered after measurement\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eRapid Analysis\u003c\/strong\u003e - Quick procedure with minimal sample preparation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIncluded Accessories Electronics India 681 Digital Photo Fluorometer\u003c\/h3\u003e\nThe Electronics India 681 Digital Photo Fluorometer comes complete with everything needed for immediate operation:\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eTest Tubes\u003c\/strong\u003e - Set of 5 sample tubes (15mm D × 80mm H)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePrimary Filters\u003c\/strong\u003e - Corning 5840 and Corning 5113 mounted on holders\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSecondary Filters\u003c\/strong\u003e - Corning 4308, Corning 3486, and Corning 3385 mounted on holders\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDust Cover\u003c\/strong\u003e - Protective cover to maintain instrument cleanliness\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eInstruction Manual\u003c\/strong\u003e - Comprehensive documentation for setup and operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDesign Features Electronics India 681 Digital Photo Fluorometer\u003c\/h3\u003e\n\u003ch4\u003eOptical System\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003e90° Detection Geometry\u003c\/strong\u003e - Minimizes interference from the excitation source\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Filters\u003c\/strong\u003e - Corning glass filters for precise wavelength selection\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePowerful Illumination\u003c\/strong\u003e - 50W tungsten halogen source provides stable excitation\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSensitive Detector\u003c\/strong\u003e - Wide-range photodiode\/photocell for accurate measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eElectronic System Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDigital Readout\u003c\/strong\u003e - Clear 3-digit LED display for direct concentration readings\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eAdjustable Sensitivity\u003c\/strong\u003e - Four-range adjustment for measurement flexibility\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eStable Circuitry\u003c\/strong\u003e - Reliable electronics for consistent performance\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eSimple Controls\u003c\/strong\u003e - User-friendly interface for straightforward operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePhysical Design Electronics India 681 Digital Photo Fluorometer\u003c\/h4\u003e\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eCompact Footprint\u003c\/strong\u003e - Space-efficient dimensions (260 × 335 × 160 mm)\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e - Robust build quality for laboratory environments\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eLightweight\u003c\/strong\u003e - Approximately 4.5 kg for easy positioning and transport\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eIntegrated Sample Holder\u003c\/strong\u003e - Properly positions test tubes for optimal measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuality Assurance\u003c\/h3\u003e\nAs an ISO 9001-2000 certified manufacturer, Electronics India maintains rigorous quality control standards throughout the production process: Electronics India 681 Digital Photo Fluorometer\n\u003cul\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eComponent Testing\u003c\/strong\u003e - Verification of all optical and electronic components\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003ePerformance Validation\u003c\/strong\u003e - Each unit tested against reference standards\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eCalibration Verification\u003c\/strong\u003e - Confirmation of measurement accuracy\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003eQuality Documentation\u003c\/strong\u003e - Comprehensive records of testing and inspection\u003c\/li\u003e\n \t\u003cli\u003e\n\u003cstrong\u003e1-Year Warranty\u003c\/strong\u003e - Coverage for parts and workmanship\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRelated Products from Electronics India Electronics India 681 Digital Photo Fluorometer\u003c\/h3\u003e\nElectronics India offers a comprehensive range of analytical and laboratory instruments, including:\n\u003cul\u003e\n \t\u003cli\u003eSemi-Auto Analyzers\u003c\/li\u003e\n \t\u003cli\u003eSingle Beam and Double Beam UV\/VIS Spectrophotometers\u003c\/li\u003e\n \t\u003cli\u003eFlame Photometers\u003c\/li\u003e\n \t\u003cli\u003eHaemoglobin Meters\u003c\/li\u003e\n \t\u003cli\u003eDigital pH Meters\u003c\/li\u003e\n \t\u003cli\u003eDigital Conductivity Meters\u003c\/li\u003e\n \t\u003cli\u003eDigital Photo Colorimeters\u003c\/li\u003e\n \t\u003cli\u003eTurbidity Meters\u003c\/li\u003e\n \t\u003cli\u003eAuto KF Titrimeters\u003c\/li\u003e\n \t\u003cli\u003eDigital DO, TDS, and Salinity Meters\u003c\/li\u003e\n \t\u003cli\u003eTemperature Indicators and Telethermometers\u003c\/li\u003e\n \t\u003cli\u003eWater \u0026amp; Soil Analysis Kits\u003c\/li\u003e\n \t\u003cli\u003eDigital Colony Counters\u003c\/li\u003e\n \t\u003cli\u003ePortable Meters (pH, Conductivity, TDS, DO)\u003c\/li\u003e\n \t\u003cli\u003ePharmaceutical Testing Equipment\u003c\/li\u003e\n \t\u003cli\u003eLaboratory Microscopes Electronics India 681 Digital Photo Fluorometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSummary Electronics India 681 Digital Photo Fluorometer\u003c\/h3\u003e\nThe Electronics India Model 681 Digital Photo Fluorometer combines precision optical design with reliable electronic performance to deliver sensitive and accurate fluorometric analysis. With its comprehensive filter set, adjustable sensitivity ranges, and minimal sample requirements, this instrument provides an efficient solution for the quantitative determination of fluorescent compounds across biochemical, pharmaceutical, environmental, and educational applications. Manufactured to ISO 9001-2000 standards and backed by a 1-year warranty, the Model 681 offers reliable performance and excellent value for laboratories requiring fluorescence measurement capabilities.\n\n \n\n ","brand":"Electronics India","offers":[{"title":"Default Title","offer_id":51460964155638,"sku":"EI-FLU-681","price":92630.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/6535\/1158\/files\/Electronics_India_681_Digital_Photo_Fluorometer__84900.1754455680.386.513_d5e62ee8-da66-4993-931a-237fe4c91414.png?v=1786598878","url":"https:\/\/scispectrum.in\/products\/electronics-india-681-digital-photo-fluorometer","provider":"SciSpectrum Lab Essentials","version":"1.0","type":"link"}