When there is a certain amount of water vapor on the leaves, they are easily infected by some fungal and bacterial diseases. Leaf surface humidity sensors can measure the presence and duration of humidity on leaves, allowing researchers or producers to predict the occurrence of diseases and take relevant protective measures for plants or crops.

The Leaf Moisture Sensor (LWS) manufactured by Decagon Devices Inc. can accurately measure leaf moisture and detect trace amounts of water or ice crystal residue on the leaves. The sensor adopts a blade like design to simulate the characteristics of the page, which can more accurately reflect the situation of the leaf environment. It measures the presence of water or ice by mimicking the changes in the dielectric constant of the upper surface of the blade medium. Unlike sensors based on resistance measurement, it does not require coloring or calibration, and can also provide effective monitoring of ice. LWS has low power consumption and can perform long-term uninterrupted monitoring. It is easy to install and can be hung on the greenhouse or on the mast of the weather station.

The data collectors produced by LWS and CSI have good compatibility and can be connected to the wireless sensor measurement network through the CWS900 series wireless sensor interface, achieving digital wireless transmission of measurement data.