{"product_id":"vis721-visible-spectrophotometer","title":"VIS721 | Visible Spectrophotometer","description":"\u003cp\u003eThe VIS721 Visible Spectrophotometer is a routine laboratory instrument used for colorimetric analysis in the visible wavelength range from 340nm to 1020nm. It is suitable for samples that already have color or can be reacted with color-developing reagents before measurement. This makes it useful for water testing, wastewater analysis, soil and agriculture labs, food testing, chemical QC, teaching labs and industrial quality control. Common applications include iron testing with 1,10-phenanthroline; phosphate\/phosphorus testing via blue phosphomolybdate complex formation; copper testing using blue ammonia complexes; chromium VI analysis with diphenylcarbazide; manganese testing with permanganate; and nitrite\/nitrate analysis using colour-forming methods such as the Griess reaction.\u003c\/p\u003e\n\u003ch2\u003ePro Tip\u003c\/h2\u003e\n\u003cp\u003eA visible spectrophotometer yields the best results when paired with the correct reagent method. Always confirm the wavelength, blank solution, reaction time, and calibration curve before testing; incorrect reagent preparation can yield poor results even when the instrument is working correctly. Buy VIS721 Visible Spectrophotometer from Kamadi Pakistan for practical visible-range laboratory and colorimetric testing.\u003c\/p\u003e\n\u003ch2\u003eBuyer’s Selection Guide\u003c\/h2\u003e\n\u003cp\u003eChoose the VIS721 if your laboratory performs visible-range colorimetric tests for water, wastewater, soil, agriculture, food, education or chemical analysis. It is suitable for routine absorbance, transmittance and concentration work where the test method produces a visible colour. For UV applications below 340nm, such as DNA, protein or UV absorbance analysis, select a UV-Visible spectrophotometer instead.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVisible-range spectrophotometer for colorimetric testing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e340–1020nm wavelength range\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAbsorbance, transmittance and concentration modes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for iron, phosphate, copper, chromium, manganese and nitrite tests\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRS232 output for data connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eModel: VIS721\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Type: Visible Spectrophotometer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptical System: Single beam, grating 1200 lines\/mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWavelength Range: 340–1020nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpectral Bandwidth: 6nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWavelength Accuracy: ±3nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWavelength Repeatability: 1nm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePhotometric Accuracy: ±1%T\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePhotometric Repeatability: 0.5%T\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLight Source: Tungsten lamp\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCuvette Holder: 10mm manual 4-cell holder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWater and wastewater colorimetric testing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIron, phosphate and chromium VI analysis\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSoil, fertilizer and agriculture lab testing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFood, beverage and chemical QC analysis\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEducational and routine laboratory experiments\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lab Supplies China","offers":[{"title":"Default Title","offer_id":49521670029569,"sku":"121930003","price":64000.0,"currency_code":"PKR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/5659\/1873\/files\/vis721_spectrophotometer_water_testing_Kamadi_pakistan.jpg?v=1783265253","url":"https:\/\/kamadi.pk\/products\/vis721-visible-spectrophotometer","provider":"Kamadi Pakistan","version":"1.0","type":"link"}