Overview：
Soil sensor is a general term for monitoring soil moisture. Can be divided into: soil moisture sensor, soil moisture meter, soil moisture meter, soil moisture sensor smart, soil moisture sensor, soil temperature sensor, soil salinity sensor.
Soil water content has two expression methods: weight water content and volume water content (volume water content). The weight water content is measured by the soil drying method. The water content measured by the soil moisture sensor is volumetric water content. That is, a soil moisture sensor is an instrument that measures the proportion of moisture in a unit of total soil volume. Some soil moisture sensors can simultaneously measure the three parameters of soil moisture content, soil temperature and total salt content in the soil.
working principle：
The soil moisture sensor smart uses the FDR frequency domain reflection principle. FDR frequency domain reflectometer is an instrument used to measure soil moisture. It uses the principle of electromagnetic pulse to measure the apparent permittivity of the soil according to the frequency of electromagnetic waves propagating in the medium. So as to get the relative water content of the soil. 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.
application：
Sensors that detect soil conditions have become an important tool for modern farmers in crop production, and more gratifying developments have occurred in this field.
The benefits of soil sensors are obvious. Due to the difference in electrical resistance or conductivity. It can clearly reflect the information of soil moisture and soil particle composition. It also draws intuitive conclusions on density, pH, accumulation of nutrients, and temperature. Through the network construction in the farm, the real-time parameters collected by the soil sensor are transmitted to the host computer. Cooperate with the system installed on the machine to realize the automatic control spraying of chemical fertilizers and pesticides.
Experts generally believe that soil sensors systems will become a major boost to modern agriculture in the foreseeable future. The soil sensor is buried underground, in a static state and relatively stable. Can meet higher data transmission requirements. These advantages are not available in telemetry. Said Robin Gibbs, a PhD from the Institute of Agricultural Engineering, Leibniz University, Germany.
