C-100 is a new multi-functional water quality test instrument, which can measureTDS,EC, salinity value S.G and temperature. The measurement range is and wide, which can measure both water salinity and sea salt,This is a Amazing Digital Water Quality Monitor Tester for Household, Pools, Drinking Water, Aquariums Salinity Range: 0-10000ppm/10.1-250ppt or 0.1-25%, salinity tester has an automatic temperature compensation function(32F-140F), which can decrease the error caused by the change of liquid temperature. Wide applications: There are purposes for the salinity tester. This instrument can not only detect the salt content of edible salt, saltwater pool, and fish pond, but also the salinity of seawater, marine, saltwater fish tank salt level testing. Backlit design: There is no need to worry about seeing the displayed value if the light is insufficient. salinity meter features a green backlit LCD to help you see the measurement results clearly in any situation. 5-in-1 salinity tester: The multi-parameter Tester can test Salinity, TDS, EC, S.G. and Temperature in an accurate, quick, and reliable manner for most regular water solutions' testing. Support One-tap switch from salinity to TDS/EC. Colour:Green Material:Plastic Package Contents: 1 * Water Quality Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.