" 【Wide Application PH Meter】The 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 the quality of swimming pools, RO/DI systems, measuring the pH balance in aquariums, spas, hot tubs or hydroponic systems. 【Reliable TDS Meter, Accurate and Fast Measurement】The digital ppm meter is equipped with a high-quality titanium alloy probe for fast and accurate water quality testing. Our water quality tester has a wide testing range of 0-9999ppm and 0-200ppt, which ensures various usage functions. The salinity test is easy to use: if you want to use our swimming pool salinity tester, you just need to turn on the meter and click the "Mode" button to switch to the "Salinity" function. . This operating concept is simple and practical is very considerate and provides a high-quality experience. Wide Application Salinity Meter: Hofun digital water salinity tester is suitable for