{"product_id":"salinity-water-quality-tester-ls311","title":"Salinity Water Quality Tester LS311 with Nine Parameters","description":"\u003cp\u003eThe Linshang LS311 salinity water quality tester provides nine readings in a compact pen-style instrument. It uses UV absorbance for COD, TOC and UV275 readings, together with electrode conductivity for TDS and EC measurements. Water temperature appears alongside the sample results on a 1.14-inch color display.\u003c\/p\u003e\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/salinity-water-quality-tester-ls311-water-sample-test.jpg?v=1793772063\" alt=\"LS311 handheld tester measuring a water sample\" width=\"2000\" height=\"1123\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\u003cfigcaption\u003eLS311 handheld tester measuring a water sample\u003c\/figcaption\u003e\u003c\/figure\u003e\u003ch3\u003eCompare a set of water indicators\u003c\/h3\u003e\u003cp\u003eUV-absorbance-based COD and TOC readings provide indicators for sample comparison, while UV275 records absorbance at the specified ultraviolet wavelength. Conductivity and calculated TDS provide complementary information on dissolved ionic content. Automatic temperature compensation supports consistent comparisons between samples.\u003c\/p\u003e\u003cp\u003eThe LS311 also calculates salinity, general hardness and specific gravity from conductivity. These added displays support suitable seawater and aquaculture sample checks. Select the displayed parameter for the sample and compare it within its stated measuring range.\u003c\/p\u003e\u003cp\u003eThe instrument's four-color score display summarizes its internal rating for the supported drinking-water measurement mode. Individual numerical readings remain available for comparing samples and tracking changes.\u003c\/p\u003e\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/salinity-water-quality-tester-ls311-probe-closeup.jpg?v=1793772053\" alt=\"LS311 electrode and optical probe close-up\" width=\"2000\" height=\"1123\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\u003cfigcaption\u003eLS311 electrode and optical probe close-up\u003c\/figcaption\u003e\u003c\/figure\u003e\u003ch3\u003eUse the correct sample and calibration setup\u003c\/h3\u003e\u003cp\u003eCalibrate with distilled water before first use and after extended storage. Clean the probe with water between samples to reduce carryover, and use non-corrosive samples within 0–50°C. Follow the prescribed cleaning method to protect the optical and electrode surfaces. Two AAA alkaline batteries power the tester.\u003c\/p\u003e\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCOD \/ TOC range and resolution\u003c\/th\u003e\n\u003ctd\u003e0–100mg\/L, 0.01mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCOD \/ TOC accuracy\u003c\/th\u003e\n\u003ctd\u003e±0.5mg\/L at 0–5mg\/L, ±10% of standard value at 5–100mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eUV275 range \/ resolution\u003c\/th\u003e\n\u003ctd\u003e0–1.0au\/cm \/ 0.001au\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eUV275 accuracy\u003c\/th\u003e\n\u003ctd\u003e±0.01au\/cm at 0–0.1, ±10% of standard value at 0.1–1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTDS range \/ accuracy\u003c\/th\u003e\n\u003ctd\u003e0–2000ppm, ±5ppm at 0–100ppm and ±5% of standard value at 100–2000ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEC range \/ accuracy\u003c\/th\u003e\n\u003ctd\u003e0–4000µS\/cm, ±10µS\/cm at 0–200 and ±5% of standard value at 200–4000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSalinity range \/ resolution\u003c\/th\u003e\n\u003ctd\u003e0–26% \/ 0.01%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSalinity accuracy\u003c\/th\u003e\n\u003ctd\u003e±0.25% at 0–5%, ±5% of standard value at 5–15%, ±10% at 15–26%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eGeneral hardness \/ specific gravity\u003c\/th\u003e\n\u003ctd\u003e0–1000ppm \/ 0.9800–1.2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWater temperature\u003c\/th\u003e\n\u003ctd\u003e0–50°C, 0.1°C resolution, ±2°C accuracy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions \/ instrument weight\u003c\/th\u003e\n\u003ctd\u003e157 × 37 × 14mm \/ approximately 68g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Linshang","offers":[{"title":"Default Title","offer_id":68120200970283,"sku":"ELE-M8T4-01","price":85.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2133\/5851\/files\/salinity-water-quality-tester-ls311-front-view-square-main-1200-v3.jpg?v=1793781133","url":"https:\/\/mcooh.com\/products\/salinity-water-quality-tester-ls311","provider":"Mcooh","version":"1.0","type":"link"}