1.Fast accurate: The meter can quickly and accurately obtain results without using color charts or messy test strips. It has a resolution of 0.01, an accuracy of 0.05, can be fully measured in the pH range of 0 to 14, and the pH meter has been calibrated at the factory. Chlorine content in the safe measurement range: 1.2 1.7 ppm, pH in the safe measurement range: 7.2 7.8. 2.Practical safety: Chlorine content recommended in swimming pools and spas: The pH value of swimming pools and spas is 1.2 to 1.7 ppm and PH is 7.2 to 7.8ph. The water quality digital monitor is an indispensable tool for quickly and accurately reading ph and chlorine, which can ensure your swimming pool / spa water is safe, comfortable and hygienic. 3.Application widely: This PH meter is very suitable for various tasks, such as swimming pool, tap water, home brewing, laboratory testing, aquarium maintenance and so on. Electric tester for testing pH and chlorine (Cl2) levels in water. It is used to routinely monitor the pH and chlorine content of swimming pools, spas and different water sources. 4.Miniature convenient: Handheld pen type and compact suitcase can be put in a pocket or bag, and can be carried anywhere. Because the pH meter has builtin (ATC) automatic temperature compensation, it no longer needs to consider the temperature of the test liquid, so it can accurately determine the pH of the sample at any temperature within the range of 0 °C 80 °C (32 °F 176 °F), very convenient.