1PCS Digital PH Tester Meter 0.0 - 14.0pH for Pool Water Aquarium Hydroponic
Accuracy: ± 0.2pH (@ 20 ° C) /±0.2pH. And dry the electrode with filter paper. Resolution: 0.1pH. The solution was stirred gently and wait for about two minutes Chung. Read the display. We will leave it for everyone that leaves it for us.