Water Quality Testing Device Professional PH Chlorine Cl2 Level Meter Tester with Probe for Swimming Pool Spa Water Monitor. Accurate and Fast Results: The swimming pool chlorine residual detector and PH water quality detector provides quick and accurate measurements of both PH and chlorine residual levels, ensuring your swimming pool or spa remains safe for swimmer use. Tool for Maintaining PH and Chlorine Levels: This water quality testing device helps you maintain the correct balance of PH and chlorine levels in your pool or spa without the guesswork or the need for chemical additives. Easy to Use: With its electric testing system, this detector is easy to use and suitable for routine monitoring of PH and chlorine residual levels in swimming pools, spas, and other water sources. Prevents Illness and Infection: Checking PH and chlorine levels is essential to maintaining a healthy swimming environment that prevents ear and skin infections and diarrhea caused by bacteria growth. Saves Time and Money: By providing accurate readings, this detector can save you time and money by helping you adjust your pool chemicals only when necessary, rather than guessing and overtreating.