?4 in 1? A very complete kit to check the quality of your water, whether it comes from the tap, recovery, aquarium or swimming pool. TDS tester and PH tester have small size and light weight as a pen, easy to carry and easy to take it in your pocket when you go out. The TDS water tester locks the measurement result when you press the HOLD button and automatically shuts off after several minutes of non-use. The pH tester has an automatic calibration function and you can get a reading quickly. And these 2-in-1 pH and TDS meters are also perfect for home or lab testing. High Accuracy: The numbers of the pH meter range from 0.00-14.00 (PH ), while the numbers of the EC and TDS digital meters range from 0 to 19990 ppm. PH resolution is 0.01pH, Accuracy ±0.05pH.TDS: 0~9990ppm, Conductivity: 0~9990us/cm, Accuracy: ±2%, Reliable and fast readings. ?Easy Calibration? : The pH tester automatically calibrates at three points (calibration only at 6.86 points: accuracy at 0.1 pH). You don’t need
