The Nutradip pH Meter DC continuously monitors the acidity and alkalinity levels in your nutrient solution, a crucial element in productive hydroponic gardens. Maintaining proper pH levels in hydroponics is essential to both yields and the overall health of the plants. Unbalanced pH levels in the hydroponic reservoir can cause elements to freeze up, rendering them useless as food to the plant. The NutraDip pH Meter AC allows you to keep a constant vigil against incorrect pH levels. A large illuminated screen will allow you to see readings, even from across the room. This model is battery operated and measures pH levels between 0 and 14.