Portable TDS meters can be taken anywhere to measure water quality, such as tap water, RO system water, aquarium water, sea water and pool water. A fully transparent liquid crystal (LCD) is used to display 4-digit values and the corresponding physical size units. This product can detect the salt content of edible salt. At the same time, it can detect the salt content of seawater. Food salt measuring range: 0.00-25.00% salt range: 22.1-200.0 pm Built-in TDS, pH, salinkector, EC meter and temperature measurement. TDS measurement range: 0-1000PM, EC measurement range: 0-10000US/cm, pH measurement range: 0.01-14.00 pH, salinometer measuring range: 0.00-25.00%, temperature conversion function. Auto power off function saves energy by turning off the power after 5 minutes of inactivity.< /p>