Salt/TDS/Temperature Tracer PockeTester LaMotte 1749 1749 637395445484 Test your salt levels quickly and accurately with this handheld salt meter. Simply turn it on and dip the end into your pool water. Double check the accuracy of your generator and detect when your cell might need to be cleaned!Designed for the pool professional. The tester's probe is dipped into a sample of pool water and the results are ready instantly. The Salt PockeTester measures the Sodium Chloride level in salt water pools with a range from 0 to 9,999 ppm. Total Dissolved Solids are measured from 0 to 9,999 ppm and Temperature from 32.0 to 149°F. A memory feature saves up to 25 test results.