7-in-1 pH, Free Chlorine, ORP, EC, TDS, Salt, and Temperature Meter for Swimming Pools - Waterproof Salinity Tester Free Chlorine Tester for Pools - This digital chlorine tester helps you quickly monitor the concentration of free chlorine ions in your swimming pool. For most pools, the free chlorine concentration range is typically between 1 and 3 ppm. This effectively cleans the water while keeping it clear and transparent, making the pool look more attractive and allowing swimmers to enjoy a healthy and pleasant swimming experience. Salt Tester for Saltwater Pools - This salinity meter helps check the salt level (perfect level: 2700-3400 ppm) of saltwater pools and hot tubs with salt chlorination systems. Help your salt chlorinator operate more efficiently at the appropriate salt level. The salt meter can help you keep your pool clean and avoid the negative effects of too much or too little salt on your body and pool equipment. pH level tester for pool pH: 0.00 ~ 14.00; The pH pool tester can help check the pool's pH level. Maintaining the correct pH level is crucial for the operation and maintenance of saltwater pools. Typically, the perfect pH level is between 7.2 and 7.8. Regular pH testing and adjustments can help keep the water clean, ensure comfortable swimming, and protect pool equipment from damage. Pool chlorine tester vs. pool test strips - When testing with test strips, you have to determine your pool's level based on the color of the strip. However, free chlorine meters are easier, more accurate, and more user-friendly than test strips. Simply place it in the water for a few seconds to get an accurate reading. Easy to use – The 7-in-1 ORP meter accurately measures FAC, pH, salinity, EC, TDS, ORP, and temperature. Its backlit design allows for measurements in low-light environments. Pocket-sized, it lets you test in-ground pools, spas, hot tubs, and more, anytime, anywhere. Struggling to find a saltwater pool tester that's both accurate and easy to use? The Yieryi multifunctional pH/EC meter is the answer. Note: Pool water pH should be between 6.5 and 8, and the ORP should be between 487 and 840 mV for the FAC (chlorine) reading to be normal. If pH and ORP values ​​are outside this range, the FAC reading will not be normal. pH range: 0.1-14.0 Resolution: 0.1 pH Accuracy: 0.1 pH FAC (free available chlorine) range: 0.1-4.0 ppm Salt range: 0-10000 ppm, 10.1-200.0 ppt, 0.01%-25.00% (1000 ppm = 1 ppt) Resolution: 1 ppm, 10 ppm Accuracy: 2% F.S. EC range: 0-10000 µS/cm, 10.01-19.99 mS/cm, 20.1-400.0 mS/cm, Resolution: 1 µS/cm 10 µS/cm 0.01 mS/cm Accuracy: 2% F.S. TDS range: 0-10000 ppm, 10.1-200.0 ppt Resolution: 1 ppm 10 ppm Accuracy: 2% F.S. ORP Range: 999 m² Resolution: 1 mV Accuracy: 15 mV Temperature Range: 0.0-60.0°C 32.0-140°C Resolution: 0.1 / 0.1 Accuracy: 0.5°C Battery: 4 * 1.5V LR44 (not included) Color: As shown Material: Plastic Package Contents: 1 x 7 in 1 Tester Only the above package contents, other products are not included. Note: Light reflections and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm.