{"product_id":"carbon-dioxide-combination-ion-selective-electrode-ise-hi4105","title":"Carbon Dioxide Combination Ion-Selective Electrode (ISE) - HI4105","description":"\u003cp\u003eIn solution, carbon dioxide reacts with water to form carbonic acid. Carbonic acid dissociates into bicarbonate and carbonate species. The concentrations of carbon dioxide, carbonic acid, bicarbonate, and carbonate species are pH dependent. As the pH of a solution becomes more alkaline, the equilibrium shifts to favor carbonate as the predominant species. A more acidic pH favors carbon dioxide as the predominant species.\u003c\/p\u003e\n\u003cp\u003eFor the HI4105 to measure carbon dioxide accurately, it is important that the pH of the calibration standards and sample be lowered with the carbon dioxide ionic strength adjuster (ISA) solution. The carbon dioxide ISA ensures the pH of solutions is kept between pH 4.2 and 5.2. In this pH range, the carbonate and bicarbonate in solution are converted to carbon dioxide for an accurate measurement. The HI4105 carbon dioxide gas sensing ISE can measure from 400µM (17.6 mg\/L) to 0.02M (880 mg\/L).\u003c\/p\u003e\n\u003ch4\u003eConversion Table for CO\u003csub\u003e2\u003c\/sub\u003e\n\u003c\/h4\u003e\n\u003cdiv style=\"overflow-x: auto; margin: 0 0 32px;\"\u003e\u003ctable\u003e\n\u003ccolgroup\u003e \u003ccol width=\"210\"\u003e \u003ccol width=\"*\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eMultiply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003emoles\/L (M) to ppm (mg\/L)\u003c\/td\u003e\n\u003ctd\u003e4.4 x 10\u003csup\u003e4\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eppm (mg\/L) to M (moles\/L)\u003c\/td\u003e\n\u003ctd\u003e2.273 x 10\u003csup\u003e-3\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eFeatures at-a-glance\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eReplaceable PTFE Membranes\u003c\/strong\u003e - Gas sensing ISEs are combination electrodes that detect dissolved gases in a solution. The sensing element is separated from the sample solution by a gas permeable, PTFE membrane that is easy to replace.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDurable Delrin® Body\u003c\/strong\u003e - The probe body is composed of durable Delrin plastic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBNC Connection\u003c\/strong\u003e - The HI4105 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.\u003c\/p\u003e\n\u003ch2\u003eTheory of Operation\u003c\/h2\u003e\n\u003cp\u003eA gas sensor works due to the partial pressure of the measured gas in solution. The dissolved gas in the sample diffuses into the membrane and changes the pH in a thin film of unbuffered electrolyte on the surface of the internal pH sensor. Diffusion continues until the partial pressure of the sample and the thin film of electrolyte are the same. The pH change is proportional to the concentration of dissolved gas in the sample solution.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eHI4105\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003eCarbon Dioxide Combination Ion-Selective Electrode (ISE) - HI4105\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription\u003c\/td\u003e\n\u003ctd\u003ecombination\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003ecarbon dioxide (CO\u003csub\u003e2)\u003c\/sub\u003e 0.02M to 4 10\u003csup\u003e-4\u003c\/sup\u003eM, 880 to 17.6 mg\/L (ppm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0 to 40 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eDelrin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimum pH Range\u003c\/td\u003e\n\u003ctd\u003epH 4.2 to 5.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length\/Overall Length\u003c\/td\u003e\n\u003ctd\u003e120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable\u003c\/td\u003e\n\u003ctd\u003ecoaxial; 1 m (3.3’)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eBNC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNotes\u003c\/td\u003e\n\u003ctd\u003eApproximate Slope +54 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eManuals\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"https:\/\/manuals.hannainst.com\/HI4105\" target=\"_blank\" rel=\"noopener\"\u003eCarbon Dioxide Combination Ion-Selective Electrode (ISE) - HI4105\u003c\/a\u003e\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":67871293636977,"sku":"HI4105","price":128992.5,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/hi4105_y2016.jpg?v=1792646087","url":"https:\/\/hannainst.in\/products\/carbon-dioxide-combination-ion-selective-electrode-ise-hi4105","provider":"hanna","version":"1.0","type":"link"}