Easy to operate, it features three test modes- on/off ... and comes with a cover case? This HM Digital TDS meter tests the purity level of the water, to ensure safe drinking.

ACUTAS TDS Meter Water Quality Tester, TDS meter for water testing best Digital PPM Tester For home, Swimming Pools, Aquariums, Hydroponics and more The Aptechdeals TDS Meter comes with three ...