How Soil Moisture Sensors Work

The soil moisture sensor adopts the principle of FDR frequency domain reflection. FDR (Frequency Domain Reflectometry) is an instrument used to measure soil moisture. It uses the principle of electromagnetic pulse to measure the apparent permittivity of soil according to the frequency of electromagnetic wave propagation in the medium, so as to obtain the relative soil moisture content , FDR has the advantages of simple and safe, fast and accurate, continuous fixed point, automation, wide range, less calibration and so on. It is a recommended soil moisture measuring instrument.

Soil Moisture Sensor Applications

Sensors that detect soil conditions have become an important tool for modern farmers in crop production, and there are more exciting developments in this area.

The benefits of soil sensors are obvious. Due to differences in electrical resistance or conductivity, they can clearly reflect information on soil moisture and soil particle composition, and also draw intuitive conclusions about density, pH, nutrient accumulation, and temperature.

Through the network construction in the farm, the real-time parameters collected by the soil sensor are transmitted to the computer host, which cooperates with the system installed on the machine to realize the automatic control and spraying of chemical fertilizers and pesticides.

Soil sensor systems will be a big boost to modern agriculture for the foreseeable future. "Technically speaking, this may also be solved through telemetry and other methods, but the cost of satellites, unmanned helicopters, etc. is higher, and it is difficult to monitor at any time. More importantly, soil sensors are buried underground and are in Static state, relatively stable, can meet higher data transmission requirements. These advantages are not available in telemetry.”

Agriculture Sensors Catalog

Agriculture-Sensors-Catalog-NiuBoL-2024.pdf