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產品描述：土壤水分傳感器基于頻率反射 FDR 原理，通過 100MHz 頻率下測量傳感器上電容的變化，從而測量插入介質的介電常數。

產品英文描述：The soil moisture sensor is based on the principle of frequency reflection FDR .The dielectric constant of the inserted medium is measured by measuring the capacitance change on the sensor at a frequency of 100MHz.

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