pH Meter, 4-in-1 Electronic pH Tester for Swimming Pools, pH Meter, TDS Meter, Water Quality and pH Test for Drinking Water, Aquariums, Hydroponics, and Swimming Pools

4-in-1 pH Tester: A very complete kit for checking the quality of your water, from tap water to rainwater harvesting, aquariums, or swimming pools. The TDS/pH testers are small and lightweight, like a pen, and include a pH meter for drinking water, beverages, aquariums, hydroponics, and swimming pools. The pH meter is easy to use: the TDS meter freezes the measurement result when you press the "HOLD" button and automatically shuts off after a few minutes of inactivity. This 2-in-1 pH and TDS meter is also ideal for home testing. High accuracy: the pH meter readings range from 0.00 to 14.00, while the EC and TDS digital meters range from 0 to 19,990 ppm. Use a digital meter for precise readings instead of comparing color with pH test paper. Avoid inaccuracies due to different lighting conditions; this is also helpful for those with faint colors. Easy calibration: The pH tester automatically calibrates to three points (6.86 and 4.01 points). No tools are needed; simply immerse the pH meter electrode in the solution. Press "ON/OFF" to turn on the electronic pH meter, shake gently, and wait a few seconds until the readings stabilize.