accurate ph tester-- pH Meter with a sensitive electrode sensor, pH tester with 0-14.0 measuring range could read accurate pH levels quickly and easily. Accurate pH tester Kit (0.01 Resolution) is accurate that it could test accurately within ± 0.01 pH. wide application-- Digital pH meters are Perfect for home and laboratory testing. pH pen can test pH and is Perfect for multiple scenarios Perfect for testing water, swimming pools, aquariums, spas, hydroponics, wine and beer. automatic temperature-- When the temperature of the sample solution is different from the standard solution, pH meter has built-in automatic temperature compensation system (ATC) which can accurately determine the pH value of the sample at temperature 0°C-60°C (32°F-140°F). simple calibration-- pH meter comes with 3pcs pH calibration powder, press the calibration button (CAL) and hold the water pH tester at the pH buffer powder for several seconds, pH tester can automatically calibrate. attention-- When not in use, please cover the cap. The glass electrode of the ph meter exposed to the air, that make the test error and the value unstable, which directly affect the pH meter working., Weight: 0.12235655541 pounds, Manufacturer: Aisuoka