1. 【Versatile pH Meter】A pH meter is an essential tool for improving the quality of life. This digital pH meter can be used in the following areas: measuring the pH balance in drinking water quality testing, pool water quality monitoring, RO/DI systems, aquariums, spas, hot tubs, or hydroponic systems. 2. 【Reliable TDS Meter with Accurate and Fast Measurement】The digital ppm meter is equipped with a high - quality titanium alloy probe, which can perform water quality testing quickly and accurately. Our water quality meter has a wide testing range from 0 to 9999 ppm and 0 to 200 ppt, providing multiple usage functions. 3. 【Easy - to - Use Salinity Test】If you want to use our pool salinity meter, simply turn on the meter and press the "Mode" button to switch to the "Salinity" function. This simple and practical operation concept is very considerate, ensuring a high - quality experience. 4. 【Wide - Application Salinity Meter】The Hofun digital water quality salinity meter is suitable for various purposes, such as pool salinity detection, koi observation, seawater, aquariums, and marine water. There are three display modes for salinity testing: PPM + PPT + %. Pool salinity test: 0 - 9999 ppm; Seawater test: 10 - 200 ppt (1 ppt = 1000 ppm, and the meter automatically switches to ppt when the ppm value exceeds 9999 ppm). Food test: 0.01 - 25%. Therefore, you don't need to calculate complex salinity values between different units, which helps avoid calculation errors and makes the results easier to read. 5. 【Multi - Parameter Water Quality Meter】The multi - parameter water quality meter has 5 different water quality testing functions: salinity + TDS + EC + pH + temperature, perfectly integrated into one meter. It can not only meet your needs for various water quality detection equipment but also save your time and money. It is a complete water quality testing kit that ensures the safety of your water quality.