Water pH Meter Kit: A very complete kit for checking the pH of pure and drinking water, from tap water, tap water, to recovery, beverages or swimming pool. It can also be used to test aquarium water and the water we use for hydroponics, aquaculture, food processing. Easy to use pool pH tester: you don't need any tools, just dip the pH meter electrode into the solution. Press "ON / OFF" to open the electronic pH meter, shake lightly and wait a few seconds until the readings stabilize. And these 2 in 1 pH and TDS meters are also ideal for home or laboratory testing. Easy calibration pH tester: the TDS pen is self-calibrating and can be used directly, the PH pen must be calibrated, that's why in the package there are several sachets with powders of different pH. The pH tester automatically calibrates to three points (6.86 and 4.01 points calibration). Accurate digital display electronic pool pH tester: Use the digital meter to get the precision numbers instead of comparing the color with the pH test paper, avoid making the precision due to the different light, also useful for those who are weak in color. Comes in a package containing 2 in 1: one to measure the pH of the water, the other to measure the rate of dissolved solid particles in the water itself. The TDS / PH testers have small dimensions and light weight like a pen. Welcome to meet