1Soil moisture sensor is suitable for soil moisture and moisture measurement, which has high precision, quick response, stable output. 2It is less affected by soil salt content and suitable for all kinds of soil. 3It can be buried in the soil for a long time, resistant to longterm electrolysis, corrosion resistance, vacuum filling and sealing, completely waterproof. 4Adopts analog output, can choose the output current type or voltage type, wiring can be threewire system. 5It is widely used in scientific experiments, watersaving irrigation, greenhouse, flowers and vegetables, grassland pasture, soil rapid measurement, plant culture, sewage treatment, grain storage and measurement of moisture content and temperature of various particles.