The GSC 10-Level Conductivity Indicator can be used for quick comparisons of conductivity in solutions including, but not limited to, tap water, vinegar, baking soda solution, or varying concentrations of salt water. This device is very simple to use - just submerge both brass prongs in a solution, hold the button on the side, and wait for the bar of LEDs to display your results. Instructions included.

Sold as a pack of 10 indicators.