A Teflon-coated ceramic carrier was used to simulate the physiological morphology of the leaves, and the conductance of the carrier had a fitting curve relationship with the humidity of the carrier. Therefore, the magnitude of the carrier current signal can be used to equate the blade humidity status. Leaf humidity has important index significance in the research of plant disease prevention and control and intelligent irrigation system. Measuring principle ADCON leaf wetness sensor was developed to provide users with a stable and low-power sensor, replacing the traditionally used paper sensor or human or animal hair. There is a conductive grid track etched onto the Teflon ceramic plate to accurately simulate the surface of the leaf, outputting a series of readings between 0 and 10