Home > Water me > FA-100 > Overview WATER ME FA-100 Water Me is a moisture sensor that detects how much water is contained in pot soil. It displays soil condition every 3 seconds on green or red LED. It will alert you through a red LED light when the moisture level is too low. You can set the alarm at 3 different levels depending upon the plant type, and seasonal and environmental factors. The pole is treated with a tarnish-proof coating. Water Me is easy to install without damaging the plant.