Soil moisture sensor is mainly used to measure the relative water content of soil, do soil moisture monitoring and agricultural irrigation and forestry protection. The soil moisture sensor uses the FDR frequency domain reflection principle. FDR (Frequency Domain Reflectometry) is an instrument used to measure soil moisture. It uses the principle of electromagnetic pulses to measure the apparent permittivity of the soil according to the frequency of electromagnetic waves propagating in the medium, thereby obtaining the relative moisture content of the soil. , FDR has the advantages of simple and safe, fast and accurate, fixed-point continuous, automatic, wide range, less calibration and so on. It is a recommended soil moisture measuring instrument.
