{"product_id":"portable-photometer-for-calcium-hardness-with-cal-check-standards","title":"Portable Photometer for Calcium hardness with CAL Check standards","description":"\u003cp\u003eThe HI97720C calcium hardness photometer is a dedicated portable photometer for measuring calcium hardness from 0,00 to 2,70 mg\/L (as CaCO3) at 0,01 mg\/L resolution. Within the HI97xxx series it employs a dust-, dirt- and water-sealed optical system with LED source, narrow-band interference filter at 525 nm and silicon photocell detection for accurate, repeatable readings. Accuracy at 25 °C is ±0,11 mg\/L ±5 % of the reading, based on a calmagite method adapted from Standard Methods for the Examination of Water and Wastewater, 23rd Edition. Dissolved calcium and magnesium carbonates determine water hardness expressed as CaCO3 or MgCO3; their sum is total hardness. Hardness drives scaling of pipes, boilers and washers and can contribute to corrosion in heating, cooling, reverse-osmosis and demineralisation plant. CAL Check™ and NIST-traceable standards let users verify performance and recalibrate when needed; the built-in tutorial covers sample preparation and reagent quantities. Further functions include GLP calibration date\/time recall, automatic storage of the last 50 results, reaction timer, battery-level display, auto-off after inactivity, IP67 protection and a backlit 128 × 64 monochrome LCD. The kit from manufacturer Hanna Instruments arrives in a transport case with two capped cuvettes, plastic inserts, CAL Check™ standards, scissors, cleaning cloth, three 1,5 V AA batteries, quality certificate and manual; reagents are supplied separately.\u003c\/p\u003e\n\u003c!-- lx-pdp-inline --\u003e\n\u003cp\u003eThis article is part of \u003ca href=\"\/fr-fr\/collections\/photometers-and-spectrophotometers\"\u003ePhotometers \u0026amp; spectrophotometers\u003c\/a\u003e, in \u003ca href=\"\/fr-fr\/collections\/spectroscopy-and-photometry\"\u003eSpectroscopy \u0026amp; photometry\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePack size: 1 pc\u003c\/li\u003e\n\u003cli\u003eMeasuring range: 0,00–2,70 mg\/L (as CaCO3)\u003c\/li\u003e\n\u003cli\u003eResolution: 0,01 mg\/L\u003c\/li\u003e\n\u003cli\u003eAccuracy (25 °C): ±0,11 mg\/L ±5 % of reading\u003c\/li\u003e\n\u003cli\u003eWavelength: 525 nm (LED)\u003c\/li\u003e\n\u003cli\u003eMethod: calmagite (adapted from Standard Methods, 23rd Ed.)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57935466201420,"sku":"HI97720C","price":595.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4827\/7068\/files\/idl-HI97720C.png?v=1783730687","url":"https:\/\/www.luminixhealth.com\/fr-fr\/products\/portable-photometer-for-calcium-hardness-with-cal-check-standards","provider":"Luminix Health","version":"1.0","type":"link"}