{"product_id":"chlorine-cyanuric-acid-and-ph-portable-photometer-meter-only-hi97725","title":"Chlorine, Cyanuric Acid, and pH Portable Photometer-Meter Only - HI97725","description":"\u003cdiv style=\"margin: 0 0 48px;\"\u003e\n\u003cp\u003eThe HI97725 meter measures four important parameters in the treatment and disinfection of swimming pools, spas and cooling towers. HI97725 measures free and total chlorine, pH and cyanuric acid. Each plays a very important role in the treatment of water.\u003c\/p\u003e\n\u003cp\u003eChlorine is a commonly used for its disinfection properties. The effectiveness of the free chlorine is pH dependent. As pH decreases less than 7.4 the chlorine is found as hypochlorous acid and when pH increases above 7.4, chlorine is predominantly in the hypochlorite ion form. Hypochlorous acid is 100X more effective at killing bacteria than hypochlorite. The chlorine method is an adaptation of the US EPA Method 330.5, DPD Colorimetric Method while the pH is an adaptation of the Phenol Red Method. For chlorine and pH, when the appropriate reagent is added to the sample, is a color change will occur. The greater the concentration, the deeper the color.\u003c\/p\u003e\n\u003cp\u003eUp to 90% of the chlorine can be broken down by sunlight in a matter of hours. Adding cyanuric acid to the water stabilizes the chlorine which will slow down the breakdown process. The cyanuric acid is measured by a turbidimetric method. For cyanuric acid the cloudiness of the sample is dependent on the concentration. The associated color\/turbidity change is colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration.\u003c\/p\u003e\n\u003cp\u003eFor determination of all four parameters, a narrow band interference filter at 525 nm allows only green light to be detected by the silicon photodetector and omits all other visible light emitted from the LED lamp. As the change in color\/turbidity of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.\u003c\/p\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\/PHOTOMETER-OPTICAL-SYSTEM.jpg\" alt=\"photometer optical system\" 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\u003cul\u003e\u003cli\u003e\u003cul\u003e\u003cli\u003eLED that generates very little heat.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003e\u003cul\u003e\u003cli\u003e8 nm narrowband interference filter that is accurate to ±1 nm.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003e\u003cul\u003e\u003cli\u003eReference detector that modulates the voltage to LED for consistent light output.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eA concave focusing lens that reduces errors from imperfections in the cuvette.\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"margin: 0 0 24px; text-align: center;\"\u003eOn-Screen Features\u003c\/h2\u003e\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px 24px; margin: 0 0 48px;\"\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/0p400mgl-Certificate-Value-Screen.jpg\" alt=\"\" loading=\"lazy\" style=\"display: block; width: auto; max-width: 100%; max-height: 220px; height: auto; margin: 0 auto 16px; object-fit: contain;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 18px; line-height: 1.3;\"\u003eCAL Check\u003c\/h4\u003e\n\u003cp\u003eAdvanced features including CAL-Check to verify performance and if necessary, recalibrate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/Method_Selection.jpg\" alt=\"method option\" loading=\"lazy\" style=\"display: block; width: auto; max-width: 100%; max-height: 220px; height: auto; margin: 0 auto 16px; object-fit: contain;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 18px; line-height: 1.3;\"\u003eSetup Options\u003c\/h4\u003e\n\u003cp\u003eBacklit dot matrix LCD that offers an exceptionally intuitive user interface that is easy to read and understand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/tutorial.jpg\" alt=\"\" loading=\"lazy\" style=\"display: block; width: auto; max-width: 100%; max-height: 220px; height: auto; margin: 0 auto 16px; object-fit: contain;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 18px; line-height: 1.3;\"\u003eBacklight LCD\u003c\/h4\u003e\n\u003cp\u003eBacklit dot matrix LCD that offers and .\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/tutorial.jpg\" alt=\"\" loading=\"lazy\" style=\"display: block; width: auto; max-width: 100%; max-height: 220px; height: auto; margin: 0 auto 16px; object-fit: contain;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 18px; line-height: 1.3;\"\u003eTutorial Mode\u003c\/h4\u003e\n\u003cp\u003eTutorial mode for step-by-step instructions to guide a first-time user in how to perform a measurement correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/tutorial.jpg\" alt=\"\" loading=\"lazy\" style=\"display: block; width: auto; max-width: 100%; max-height: 220px; height: auto; margin: 0 auto 16px; object-fit: contain;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 18px; line-height: 1.3;\"\u003eMultiple Methods\u003c\/h4\u003e\n\u003cp\u003eMultiple methods for free and total chlorine measurement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/2c30min-Reaction-Time-Screen.jpg\" alt=\"\" loading=\"lazy\" style=\"display: block; width: auto; max-width: 100%; max-height: 220px; height: auto; margin: 0 auto 16px; object-fit: contain;\"\u003e\n\u003ch4 style=\"margin: 0 0 8px; font-size: 18px; line-height: 1.3;\"\u003eReaction Timer\u003c\/h4\u003e\n\u003cp\u003eBuilt-in reaction timer that ensures consistency amongst multiple users.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 0 0 48px;\"\u003e\n\u003ch4 style=\"margin-top: 0;\"\u003eHI97725 FEATURES\/BENEFITS:\u003c\/h4\u003e\n\u003ch5\u003eStable Light Source:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eThe internal reference system of the HI97725 photometer compensates for any drifts due to power fluctuations or ambient temperature changes. With a stable source of light the readings are fast and stable between your blank (zero) measurement and sample measurement.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eHigh Efficiency Light Source:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eLED light sources offer superior performance compared to tungsten lamps. LEDs have a much higher luminous efficiency, providing more light while using less power. They also produce little heat, which could otherwise affect electronic stability.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eHigh Quality Filters:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eImproved optical filters ensure greater wavelength accuracy and allow a brighter, stronger signal to be received. The end result is higher measurement stability and less wavelength error.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eGreater Light Yield:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eA focusing lens collects all of the light that exits the cuvette, eliminating errors from imperfections and scratches that may be present in the glass. The use of the convex lens reduces the need for indexing cuvettes.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eCAL Check Functionality:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eHanna's exclusive CAL Check feature allows for performance verification and calibration of the meter using NIST traceable standards. Our CAL Check standard vials are developed to simulate a specific absorbance value at each wavelength to verify the accuracy of subsequent readings.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eLarge Cuvette Size:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eThe sample cell of the HI97725 fits a round, glass cuvette with a 25 mm path length. The relatively long path length of the sample cuvette allows the light to pass through more of the sample solution, ensuring accurate measurements even in low absorbance samples.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eIntuitive Dot Matrix Display:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eThe HI97725 is designed with a backlit, graphic LCD. With virtual keys, a battery status indicator, and error messages. Users will find the meter interface intuitive and easy to read. A dedicated help key provides information relating to the current meter operation, and can be used at any stage in the setup or measurement process to show contextual help.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch5\u003eAuto-off Protection:\u003c\/h5\u003e\n\u003cul\u003e\u003cli\u003eThe meter uses three common AA batteries that allow for about 800 measurements to be taken. The auto-off feature automatically shuts off the meter after 15 minutes of inactivity in order conserve battery life.\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\u003eHI97725\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003eChlorine, Cyanuric Acid, and pH Portable Photometer-meter only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Range\u003c\/td\u003e\n\u003ctd\u003e6.5 to 8.5 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Resolution\u003c\/td\u003e\n\u003ctd\u003e0.1 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1 pH of reading at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Method\u003c\/td\u003e\n\u003ctd\u003eAdaptation of the Phenol Red Method\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree Chlorine Range\u003c\/td\u003e\n\u003ctd\u003e0.00 to 5.00 mg\/L (as Cl2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree Chlorine Resolution\u003c\/td\u003e\n\u003ctd\u003e0.01 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree Chlorine Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.03 mg\/L ±3% of reading at 25 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Chlorine Range\u003c\/td\u003e\n\u003ctd\u003e0.00 to 5.00 mg\/L (as Cl2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Chlorine Resolution\u003c\/td\u003e\n\u003ctd\u003e0.01 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Chlorine Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.03 mg\/L ±3% of reading at 25 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorine Method\u003c\/td\u003e\n\u003ctd\u003eadaptation of US EPA Method 330.5, DPD Colorimetric Method\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCyanuric Acid Range\u003c\/td\u003e\n\u003ctd\u003e0 to 80 mg\/L (as CYA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCyanuric Acid Resolution\u003c\/td\u003e\n\u003ctd\u003e1 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCyanuric Acid Accuracy\u003c\/td\u003e\n\u003ctd\u003e±1 mg\/L ±15% of reading at 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCyanuric Acid Method\u003c\/td\u003e\n\u003ctd\u003eadaptation of the Turbidimetric Method\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhotometer\/Colorimeter Light Source\u003c\/td\u003e\n\u003ctd\u003eLED with 525 nm bandpass filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhotometer\/Colorimeter Light Detector\u003c\/td\u003e\n\u003ctd\u003esilicon photocell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass Filter Bandwidth\u003c\/td\u003e\n\u003ctd\u003e8 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass Filter Wavelength Accuracy\u003c\/td\u003e\n\u003ctd\u003e±1.0 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCuvette Type\u003c\/td\u003e\n\u003ctd\u003eround 24.6 mm diameter (22 mm inside)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGLP\u003c\/td\u003e\n\u003ctd\u003eyes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e128 x 64 pixel B\/W LCD with backlight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogging Memory\u003c\/td\u003e\n\u003ctd\u003e50 readings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\/Life\u003c\/td\u003e\n\u003ctd\u003e1.5 V AA Alkaline (3 pcs.) \/ \u0026gt; 800 measurements (without backlight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutomatic Shut-Off\u003c\/td\u003e\n\u003ctd\u003eafter 15 minutes of inactivity (30 minutes before a READ measurement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironment\u003c\/td\u003e\n\u003ctd\u003e0 to 50°C (32 to 122°F); 0 to 100% RH (IP67)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e380 g (13.4 oz.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\u003cp\u003eHI97725C is supplied with CAL Check standards, cuvettes (2), caps (2), plastic inserts for cuvette, (2), scissors, cuvette cleaning cloth, 1.5V AA batteries (3), instruction manual, and instrument quality certificate, packaged in a rugged, thermoformed carrying case.\u003cbr\u003e\nHI97725 is supplied with cuvettes (2), caps (2), plastic inserts for cuvettes (2), 1.5V AA batteries (3), instruction manual, and instrument quality certificate.\u003c\/p\u003e\u003ch3\u003eManuals\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"https:\/\/manuals.hannainst.com\/HI97725\" target=\"_blank\" rel=\"noopener\"\u003eChlorine, Cyanuric Acid, and pH Portable Photometer-meter only\u003c\/a\u003e\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":67871443026289,"sku":"HI97725","price":45928.35,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/hi97725_1_1.jpg?v=1792646794","url":"https:\/\/hannainst.in\/products\/chlorine-cyanuric-acid-and-ph-portable-photometer-meter-only-hi97725","provider":"hanna","version":"1.0","type":"link"}