Water pH meter kit: A very complete kit for checking the pH of purified, drinking, tap, tap, recycled, drinking or swimming pool water. It can also be used to test aquarium water and the water we use for hydroponics, aquaculture, food processing. Easy to use swimming pool pH tester: you don't have to Need no tools, just dip the pH meter electrode into the solution. When you press the "HOLD" button, the TDS meter freezes the measurement and turns off automatically after a few minutes of inactivity. These 2 in 1 pH and TDS meters are also ideal for home or laboratory testing. The pH tester is easy to calibrate: the pH meter has an automatic calibration function, and the reading is quick , precise and reliable: the pH resolution is 0.01 pH and the accuracy is 0.01 pH. The TDS measuring range is 0-9999 ppm, conductivity is 0-9999 us/cm, and the accuracy is 2%. ETDS 0 ~ 9999 ppm Automatic temperature compensation: ATC automatically considers temperature changes. Accurate digital display electronic swimming pool PH tester: use the digital display to get the precision number, instead of comparing the color with the PH test paper, to avoid the accuracy caused by different light, and it is also useful for people with darker colors. Comes in a package which contains 2 in 1: one for measuring pH water and the other to measure the rate at which solid particles dissolve in water. The TDS/PH tester is small and light, just like a pen. feature: The sensitive electrode sensor has a measuring range of 0.00 to 14.00 pH. br /> One-button meter calibration (CAL) Large screen displays data more clearly than before. Automatically turns off after 9 minutes of inactivity.