Review on AMTAST Waterproof Conductivity Tester Probe by Alex Montgomery

I've been using this meter at home for about a month to check the pH, conductivity and TDS of my water system and other solutions I'm experimenting with testing. I have to say that for the money paid, this product delivers excellent accuracy. For example, the theoretical conductivity of a 1% NaCl solution at room temperature (70 F/20 C) is 16 mS/cm, and my readings averaged 16.1 mS/cm. Probe. A TDS/conductivity sensor is included as well as an instruction manual. Highly recommended!