TDS Meter Thermometer Water Quality Measurement Device

TDS measurement range: 0-5000 ppm; Temperature measurement range: 0-99 °C; Accuracy: 1 ppm; 0.1 °C/°F; Margin of error: +/- 2%; Digital calibration; Dimensions: 15 x 3 x 2 cm; Weight: 42.5 g; Package contents: 1 TDS-3 pH meter; 1 carrying case; Battery included and shipped with the device; TDS (Total Dissolved Solids) contains minerals, cations, anions, heavy metal ions, and small amounts of organic matter dissolved in water that cannot be determined by simple filtration methods. According to the World Health Organization; Water quality classification is as follows: TDS value Water Quality Class 0 – 17 ppm 1st class soft water (PURE WATER) 18 – 60 ppm 1st class slightly hard water (SPRING WATER) 61 – 120 ppm 2nd class moderately hard water (TAP WATER) 121 – 180 ppm 3rd class hard water (CAUTION MAY BE HARMFUL) 180 and above 4th class very hard water (UNSUITABLE FOR DRINKING)