Aug 01, 2021 · To achieve high accuracy, the pH tester has a sensitive electrode sensor, measuring range: 0.00-14.00 pH, accuracy: ± 0.01 pH. TDS meter is equipped with a high-quality probe made of titanium alloy, measuring range: 0-9990 ppm, accuracy: ± 2%. 【Easy to Operate】 Professional pH meter, TDS meter, EC meter and Temperature Meter 4 in 1 Set.. "/>Ph meter tds