【5-in-1 pH Meter】Professional measuring instrument for pH, TDS (dissolution), EC (conductivity), salinity, and temperature. Water pH tester to measure water quality in all aspects to ensure healthy water quality. Digital swimming pool water tester is suitable for drinking water, spas, aquaculture, sewage treatment, educational experiments, medical care, koi fish, aquariums, seawater, fish tanks, marine monitoring, etc. 【High-Precision pH Tester】Water testing kits for drinking water with a high-sensitivity glass probe, you can get a full measurement range of 0-14 pH, accuracy of 0.01 pH. When the measured value is stable, just press the HOLD/TEMP key to lock the measured value and take it out for display, food pH meter and one-button lock reading function. Easy and convenient operation design provides an excellent experience. 【Wide Uses】There are various purposes for salinity testing. This instrument can not only detect the salt content in edible salt, saltwater tank, and koi fish pond, but also detect the salinity of seawater, marine, and saltwater aquarium to test the salt level. 【Pocket Size and Backlit LCD Design】: Everyone can use the small and powerful pocket-sized pen tester to measure aquarium, swimming pool, fish tank, and garden pond. The pH meter features a green backlit LCD screen to help you see the measurement clearly in any situation. 【Professional Service】If you are not completely satisfied with your purchase, please feel free to contact us. We will do our best to solve your problem. Professional Multi-Parameter 5-in-1 Water Quality Tester for pH/EC/TDS/Salinity / Digital Thermometer Multifunctional Water Quality Test for Drinking Water, Swimming Pool, Aquarium by Lingyi