{"product_id":"red-sea-seawater-refractometer","title":"Red Sea Seawater Refractometer","description":"\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eRed Sea Seawater Refractometer\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold;\"\u003eHigh Accuracy Seawater Refractometer\u003c\/span\u003e\u003cbr style=\"box-sizing: inherit;\"\u003e\u003cbr style=\"box-sizing: inherit;\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold;\"\u003eRed Sea’s Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC\/77 0F.\u003c\/span\u003e\u003cbr style=\"box-sizing: inherit;\"\u003e\u003cbr style=\"box-sizing: inherit;\"\u003eMost refractometers used within the aquarium hobby are not specifically designed for reef aquariums and use an algorithm for the measurement of brine (NaCl – rather than seawater) and at a temperature of 15oC\/59 0F rather than 25oC\/77 0F. Thus, a measurement deviation of up to 1.5ppt is possible, which can have a significant adverse effect on coral growth and coloration.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eMain features of Red Sea’s Seawater Refractometer include:\u003c\/span\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eDirectly reads the absolute salinity of seawater at 25°C\/77 0F ( No need for seawater or temperature compensation factors)\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eSpecifically designed for the ionic content of seawater (NSW) for more accurate salinity measurement (industry standard refractometers are calibrated for salt brine ).\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eCalibrated for seawater (NSW) at 25oC\/77oF, the normal temperature range for reef aquariums\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e(most standard refractometers are calibrated at 15oC\/59oF ).\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eEasier to read, higher resolution display, focussed to the relevant range for reef aquariums of up to 40ppt\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eIncludes Integrated Automatic Temperature Compensation (ATC) for accurate measurement at standard ambient temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eRed Sea’s Refractometer display\u003c\/span\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eThe PPT scale on Red Sea’s Seawater refractometer is calculated using an algorithm for seawater and therefore will give a reading of the Absolute Salinity of seawater.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eThe PPT scale on regular salinity refractometers are calculated using an algorithm for Brine. Using a Brine refractometer for Seawater will give an error of approximately 1.5ppt in the salinity reading.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eAbout Salinity\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eSalinity is a general term describing the concentration of salt in water. However, solutions of different type of salts have different refractive indexes.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eBrine is a solution of Sodium Chloride (table salt) that contains 2 chemical elements.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eSeawater contains approximately 70 chemical elements that include Calcium, Magnesium, Potassium etc. in addition to the Sodium Chloride.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eSeawater and Brine of the same salinity (i.e. the same weight of salt\/liter) have different refractive indexes and will give different salinity readings if measured on the same refractometer.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eRefraction \u0026amp; refractive index\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eAll transparent materials such as liquids refract (distort) light.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eAll transparent materials refract light differently and have what is called a “refractive index” which means how much a particular material distorts light.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eDifferent concentrations of the same liquid have different refractive indexes.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eThe scale of a refractometer is calculated by using a mathematical algorithm that relates the measured refraction to its concentration for a specific liquid.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eRefractive index and temperature\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eThe refractive index of liquids change with temperature and therefore has a major effect on measuring salinity with a refractometer.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; margin: 0.25em 0px 0px; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eThe algorithm for defining the PPT (and S.G.) scale for a refractometer is calculated for a specific temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cbr style=\"box-sizing: inherit;\"\u003ePPT readings from refractometers that are not calibrated for reef aquariums (i.e. 25oC) need to be adjusted according to a conversion table to give the actual PPT at the aquarium temperature. This is often a cause for misinterpretation of refractometer readings.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eFor example, using a seawater refractometer calibrated at 20oC will give a PPT reading that is approximately 1-1.5ppt lower than the absolute salinity of the same water sample at the normal aquarium temperature of 25oC.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eTherefore, Red Sea’s Seawater Refractometer calibrated at 25°C\/77 0F directly reads the absolute salinity of seawater with no need for temperature compensation factor)\u003c\/span\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cbr style=\"box-sizing: inherit; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003e\u003cspan style=\"box-sizing: inherit; font-weight: bold; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eATC – Automatic temperature compensation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eTemperature is probably the biggest cause of wrong readings with a refractometer. Calibration and testing of water samples should be done after the refractometer and water sample have equalised at the correct temperature.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eAutomatic temperature compensation (ATC) compensates for a few degrees of difference between the ambient temperature and the calibrated temperature of the refractometer. Larger temperature variations will give an error of approximately 1.0ppt in the salinity reading.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; margin: 0px 0px 1em; padding: 0px; font-family: 'Mundo Sans', sans-serif; font-size: 15px;\"\u003eATC does not adjust the PPT reading of a refractometer to the temperature of the aquarium!\u003c\/p\u003e","brand":"Red Sea","offers":[{"title":"Default Title","offer_id":44044438175832,"sku":"7290100774830","price":110.7,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0712\/8557\/1672\/files\/RED197.png?v=1779081710","url":"https:\/\/bespokeaquariums.com.au\/products\/red-sea-seawater-refractometer","provider":"Bespoke Aquariums","version":"1.0","type":"link"}