Commonly Used pH MeterThe Hofun pH meter is an essential tool to improve your quality of life. This digital pH tester can be used in the following applications: testing drinking water quality, monitoring swimming pool quality, measuring pH balance in RO/DI systems, aquariums, spas, hot tubs, or hydroponics. Three display models for salinity testing: PPM + PPT + %. For swimming pool salt testing: 0-9999 ppm; Seawater testing: 10-200ppt (1ppt=1000ppm, when the ppm value is above 9999ppm, the meter will automatically switch to ppt). For food testing: 0.01-25%. So you don't need to calculate complicated salinity values between different units, which prevents calculation errors and makes the results easier to read. Easy Operation of Salinity Test: When you want to use our pool salt tester, you just need to turn on the meter and click the MODE button to switch to the SALT function. This simple and convenient operation design is very thoughtful, providing a first-class experience. Wide Application of Salinity Meter: Hofun digital salinity meter is applicable for multiple purposes, such as testing saltwater for swimming pools, koi carp, seawater, aquariums and Marine monitoring. Reliable TDS Meter with Accuracy and Fast MeasurementThe Hofun digital ppm meter is equipped with a high-quality titanium alloy probe, which allows you to quickly and accurately test the water quality. Our water quality tester has a range of 0-9999 ppm and 0-200ppt Wide testing range ensures various usage functions. The Hofun multi-parameter water tester is equipped with 5 different functions for testing water quality: Salinity + TDS + EC + pH + Temperature, perfectly combined in a single meter. It's not only convenient for your various water testing needs but also saves you time and money. It's a truly useful water test kit for the safety of your water quality.