{"product_id":"digital-refractometer-for-seawater-analysis-hi96822","title":"Digital Refractometer for Seawater Analysis - HI96822","description":"\u003cdiv style=\"margin: 0 0 48px;\"\u003e\n\u003cp\u003eThe HI96822 Digital Refractometer eliminates the uncertainty associated with mechanical refractometers by measuring the refractive index to determine the salinity of natural and artificial seawater including brackish, ocean water or saltwater aquarium. The instrument converts the refractive index of a sample to PSU, ppt and specific gravity. These conversions are based on respected scientific publications using the physical properties of seawater (not sodium chloride). The HI96822 is an easy to use tool for measuring salinity in natural and artificial seawater whether in the field, lab or at home.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for seawater salinity analysis (not NaCl)\u003c\/li\u003e\n\u003cli\u003eAutomatic Temperature Compensation\u003c\/li\u003e\n\u003cli\u003eHigh accuracy measurements displayed as PSU, ppt and specific gravity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eMaking a Standard Solution\u003c\/h5\u003e\n\u003cp\u003eSodium Chloride solutions can be used to check the accuracy of the meter. The table below lists two Sodium Chloride solutions and their expected ppt Seawater value.\u003c\/p\u003e\n\u003cp\u003eTo make a Standard NaCl Solution (g\/100 g), follow the procedure below\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlace container (such as a glass vial or dropper bottle that has a cover) on an analytical balance.\u003c\/li\u003e\n\u003cli\u003eTare the balance.\u003c\/li\u003e\n\u003cli\u003eTo make an X NaCl solution weigh out X grams of high purity dried Sodium Chloride (CAS #: 7647-14-5: MW 58.44) directly into the container.\u003c\/li\u003e\n\u003cli\u003eAdd distilled or deionized water to the beaker so the total weight of the solution is 100g.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eExample Standard NaCl Solution\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin: 0 0 32px;\"\u003e\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eNaCl (g)\u003c\/td\u003e\n\u003ctd\u003eWater (g)\u003c\/td\u003e\n\u003ctd\u003eTotal\u003c\/td\u003e\n\u003ctd\u003eExpected Seawater value (ppt)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.5% NaCl\u003c\/td\u003e\n\u003ctd\u003e3.50\u003c\/td\u003e\n\u003ctd\u003e96.50\u003c\/td\u003e\n\u003ctd\u003e100.000\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10% NaCl\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e90.00\u003c\/td\u003e\n\u003ctd\u003e100.000\u003c\/td\u003e\n\u003ctd\u003e96\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 24px 48px; margin: 0 0 48px;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; max-width: 440px; text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/Refractive_Index_Diagrams.jpg\" alt=\"Refractive_Index_Diagrams\" width=\"912\" loading=\"lazy\" style=\"display: block; max-width: 100%; height: auto; margin: 0 auto;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 340px; min-width: 0;\"\u003e\n\u003ch5 style=\"margin-top: 0;\"\u003eRefractive Index\u003c\/h5\u003e\n\u003cp\u003eThe HI96822 takes measurements based on a sample's refractive index. Refractive index is a measurement of how light behaves as it passes through the sample. Depending on the sample's composition, the light will refract and reflect differently. By measuring this activity with a linear image sensor, the sample's refractive index can be assessed and used to determine its physical properties such as concentration and density. In addition to the linear image sensor, the HI96822 uses an LED light, prism and lens to make measurement possible.\u003c\/p\u003e\n\u003cp\u003eVariations in temperature will affect the accuracy of refractometry readings, so the use of temperature compensation is highly recommended for reliable results. The HI96822 contains a built-in temperature sensor and is programmed specialized algorithms then apply temperature compensation to the measurement and convert the refractive index to PSU (Practical Salinity Units), ppt (part per thousand) or S.G. (Specific Gravity) (20\/20). PSU is defined as the conductivity ratio of seawater to a standard KCl solution. It is based upon the work of the UNESCO, ICES, SCOR, and IAPSO. This information is published in The Joint Panel of Oceanographic Tables and Standards. An older salinity scale is ppt (10-3), where salinity is defined by \"the salt content is the weight of the inorganic salts contained in 1 kg of seawater if all bromide and iodide are replaced by an equivalent amount of oxidesin. (Knudsen, 1901). Specific Gravity (20\/20) is based upon the published relationship between density at 20 °C and the mass of dissolved salts in the seawater sample (CRC Handbook of Chemistry and Physics, 87th Edition).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 0 0 48px;\"\u003e\n\u003ch2 style=\"margin-top: 0;\"\u003eFeatures-at-a-glance\u003c\/h2\u003e\n\u003cp\u003eOne-point calibration\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eCalibrate with distilled or deionized water\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eSmall sample size\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eSample size can be as small as 2 metric drops (100 ?l)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eQuick, accurate results\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eReadings are displayed in approximately 1.5 seconds\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eDual-level LCD\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eThe dual-level LCD displays measurement and temperature readings simultaneously\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eBattery indicators\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eBattery percent level remaining at startup and low battery indicator\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eAutomatic shut-off\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eTo conserve battery life the meter shuts off automatically after three minutes of non-use\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eIP65 water-resistant protection\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eWater resistant ABS plastic casing designed to perform under laboratory and field conditions.\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eStainless steel sample well\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eEasy to clean and corrosion-resistant\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eAutomatic Temperature Compensation (ATC)\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eSamples automatically compensated for temperature variations\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eHI96822\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003eDigital Refractometer for Seawater Analysis - HI96822\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity (PSU) Range\u003c\/td\u003e\n\u003ctd\u003e0 to 50 PSU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity (PSU) Resolution\u003c\/td\u003e\n\u003ctd\u003e1 PSU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity (PSU) Accuracy\u003c\/td\u003e\n\u003ctd\u003e±2 PSU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity Range\u003c\/td\u003e\n\u003ctd\u003e0 to 150 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity Resolution (ppt)\u003c\/td\u003e\n\u003ctd\u003e1 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity Accuracy (ppt)\u003c\/td\u003e\n\u003ctd\u003e±2 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecific Gravity Range\u003c\/td\u003e\n\u003ctd\u003e1.000 to 1.114 Specific Gravity (20\/20)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecific Gravity Resolution\u003c\/td\u003e\n\u003ctd\u003e0.001 Specific Gravity (20\/20)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecific Gravity Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.002 Specific Gravity (20\/20)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0 to 80°C (32 to 176°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Resolution\u003c\/td\u003e\n\u003ctd\u003e0.1°C (0.1°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.3 °C (±0.5 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Compensation\u003c\/td\u003e\n\u003ctd\u003eautomatic between 0 and 40°C (32 to 104°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutomatic Shut-Off\u003c\/td\u003e\n\u003ctd\u003eafter three minutes of inactivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\/Life\u003c\/td\u003e\n\u003ctd\u003e9V \/ approximately 5000 readings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e192 x 102 x 67 mm (7.6 x 4.01 x 2.6”)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e420 g (14.8 oz.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefractometer Light Source\u003c\/td\u003e\n\u003ctd\u003eyellow LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Sample Volume\u003c\/td\u003e\n\u003ctd\u003e100 µL (to cover prism totally)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSample Cell\u003c\/td\u003e\n\u003ctd\u003estainless steel ring and flint glass prism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Time\u003c\/td\u003e\n\u003ctd\u003eapproximately 1.5 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\u003cp\u003eHI96822 is supplied with battery and instruction manual\u003c\/p\u003e\u003ch3\u003eManuals\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"https:\/\/manuals.hannainst.com\/HI96822\" target=\"_blank\" rel=\"noopener\"\u003eDigital Refractometer for Seawater Analysis - HI96822\u003c\/a\u003e\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":67871439061361,"sku":"HI96822","price":27357.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/hi96822.jpg?v=1792646749","url":"https:\/\/hannainst.in\/products\/digital-refractometer-for-seawater-analysis-hi96822","provider":"hanna","version":"1.0","type":"link"}