5-in-1 pH meterWater tester professional measurement pH, TDS(Solubility), EC(Conductivity), Salinity and Temperature. Water pH tester all-round measurement of water quality to ensure healthy water quality. Digital pool water tester suitable for drinking water, beauty spa, aquaculture, sewage treatment, teaching experiments, medical care,fish tank Koi Fish, Seawater, Aquariums & Marine Monitoring etc.Three Display Designs for Salinity Test PPM + PPT + %.When you want to use this salinity tester,All you need to do is to turn the meter ON and click MODE button to shift to SALINITY function.1%=10 ppt=10000 ppm,when ppm figure is over 9999ppm, the meter automatically changes to ppt.You dont have to calculate complex salt content level numbers between different units.The scientific use of salt can effectively prevent osteoporosis,kidney disease,left ventricular hypertrophy,hypertension etc.Humanized designIP67 Waterproof lab instruments ,IP67 is the international waterproof and dustproof certification, short-term immersion protection, pool ph meter falling into the water, can be used normally;Automatic shut-off function,If the tds meter has not been used for about 5 minutes, tds meter will automatically turn offfor energy saving saves energy to avoid changing batteries frequently.Automatic Temperature CompensationTemperature can affect reading levels, pool thermometer has an even better range of 0 C-60 C (32 F-140 F), digital pool water tester has automatic temperature compensation can ensure that you are getting the best reading, so as to solve the inaccurate problem caused by changing the liquid temperature.High Accuracy pH Water TesterWater Testing Kits For Drinking Water with high sensitive glass probe, you can get a full measurement range of 0-14pH, 0.01 pH resolution. When the measured value is stable, just press the HOLD/TEMP key to lock the measured value and take it out for viewing,pH meter for food one-button lock reading function .This easy and convenient operation design offers premium experience.