DENGINEERS SOIL MOISTURE SENSOR KIT WITH ARDUINO UNO R3 FOR COLLEGE PROJECTS,DIY MODELS ETC Micro Controller Board Electronic Hobby Kit

The soil moisture sensor consists of two probes that are used to measure the volumetric content of water. The two probes allow the current to pass through the soil, which gives the resistance value to measure the moisture value. When there is water, the soil will conduct more electricity, which means that there will be less resistance. Dry soil conducts electricity poorly, so when there is less water, then the soil will conduct less electricity, which means that there will be more resistance.