1, Measure water conductivity. The conductivity of drinking water in general households is 1055us / cm. Measuring conductivity lets us know the quality of water, and drinking healthier water.

2, Measure water TDS. The range of TDS for super pure water is 0-50 PPM, and the range of TDS for affect health water is more than 1000 ppm. In our eyes it looks exactly the same, but use instruments have different results .Drinking healthy water can make us healthy and delay aging

3, Measure seawater salinity. seawaters salinity is the ratio of the total dissolved solids to the weight of seawater in seawater, usually  expressed in grams per kilogram if seawater.

4, Measure edible salt in your cooking food. The body's suitable intake salinity value is 0.900%.The world health organization recommends a daily salt intake of 6g for the general population. Eating too much or too little salt is bad for your health

5, Measure density of seawater. The density of seawater in different regions is generally 1.02-1.07,and the weight of the dissolved salts is different about 3.5% on average.it is recommended to control the proportion of salt in this range.