1749 The 1749 EC/TDS/Salt Meter is the ideal tool for testing the salinity and conductivity of your water. It also has a pH tester for checking the acidity or alkalinity of your water. The EC/TDS/Salt Meter measures both electric conductivity and total dissolved solids, which are important factors in determining how clean your water is. The device can measure from 0 to 199.9 uS, 0 to 9,999 ppm, 2.0 to 19.9 mS, 200 to 1999 uS. The TDS meter comes with a range of 0 to 99.9 ppm, 100 to 999 ppm and an accuracy of +/-1%. It has a temperature compensation range of 32 Degrees to 149 Degrees F as well as a display temperature range of 32 Degrees to 149 Degrees F. When it comes time for you to test your water's quality, make sure that you have the 1749 EC/TDS/Salt Meter on hand.