Fast Accuracy: The meter can get results quickly and accurately without using messy color charts or test strips. Auto Calibration: The pH meter has an automatic temperature compensation function. temperature, which can be adjusted based on water temperature and water quality to get a pH reading almost immediately. Practical miniature: the hand-held pen and the compact suitcase can be placed in a pocket or bag, and can be carried anywhere. Practical Safety: Recommended chlorine content in swimming pools and spas: The pH value of swimming pools and spas is from 1.2 to 1.7 ppm and the pH from 7.2 to 7.8 ph. The digital water quality monitor is an indispensable tool for quickly and accurately reading ph and chlorine, which can ensure your pool/spa water is safe, comfortable and non-corrosive. Widely Application: This pH meter is very suitable for various tasks, such as swimming pool, tap water, home brewing, laboratory testing, aquarium maintenance, etc. Electric tester for testing pH and chlorine (Cl2) levels in water. It is used to regularly monitor the pH and chlorine content of swimming pools, spas and various water sources.