Determining moisture in materials and IoT
Gerrit Voigt · 2017
Knowing the state of the setting process of concrete in buildings or the moisture level of old walls can be crucial in determining further steps in the construction or restoration process. Small 2.4 GHz modules can be either embedded or applied on the surface to determine the moisture distribution in material. Common modules, that are based on the highly available Bluetooth Low Energy standard, emit electromagnetic waves, whose signal strength gets dampened by water molecules. This effect serves as the basis on determining the moisture level in material. We will show how to apply this method in a meshed sensor network for online monitoring.