<p>Water pH Meter Kit: A very complete kit for checking the pH of pure and drinking water, from tap water, to reclaimed water, beverages or swimming pool water. It can also be used to test aquarium water and the water we use for hydroponics, aquaculture, food processing.</p> <p>Easy to use swimming 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 gently 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.</p> <p>Easy Calibration pH Tester: The TDS pen is self-calibrating and can be used directly, the PH pen needs to be calibrated, so there are several sachets with different pH powders in the package. The pH tester automatically calibrates at three points (6.86 and 4.01 points calibration).</p> <p>Accurate Digital Display Pool Measuring Products: 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 with weak color.</p> <p>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. TDS/PH testers are small in size and light in weight, like a pen.</p>