Water is a priority resource for study in various branches of science, increased by social dynamics. In the earth sciences, it is a determining factor in soil fertility affecting crop development; its availability supports biological processes; it also helps regulate soil temperature and greenhouse gas retention. Nowadays, the aim is monitoring the amount of water available for optimizing its use and soil properties. In the present work, a review of different methods and instruments for measuring soil moisture using the electrical properties is made. These instruments are easily adaptable to be automated and remote measurements. However, they require maintenance and calibration, they have good accuracy, and their sampling time is fast, which gives feasibility to their application to agricultural sciences that require continuous measurements in difficult access areas.