Research of Sensing Probe Material in Wet and Dry Soil

Soil moisture sensor probe is the basic and key part of the automated water-saving irrigation equipment. It can measure soil moisture accurately and in real-timely, while metal probes have a serious problem of corrosion and passivation as working in the soil which is a severe environment of the soil of high humidity and complex chemical compositions. Graphite gelling of different content of graphite composite material under both wet and dry conditions, the experimental study, by testing the experimental data of its resistivity contrast to identify the proportion of the composite material of graphite content suitable for the production of a new probe.