Frequency domain (FD) sensor is an instrument developed for measuring soil moisture content. The instrument has an oscillating circuit, the sensing part of the sensor is embedded in the soil, and the operating frequency will depend on the value of soil’s dielectric constant. Time domain reflectometer (TDR), determine the water content of the soil by measuring the dielectric properties of the soil through the travel time of an electromagnetic pulse through conductors located in the soil. TDR probes are more accurate, although more expensive, and were the standard for measuring soil moisture. The great limitation of this technology is that it is representative only at point scales. Finapp overcomes this limitation by providing representative soil moisture values “at field level”.
