Leaf wetness sensor (PLWS)

The leaf wetness sensor is designed to mimic the thermal mass and the radiation of the real leaf. The way it works is very simple if the plant is moist, then the sensor is moist and if the plant is dry, then the sensor is dry.

The leaf wetness sensor measures the dielectric constant on the upper part of the sensor. The dielectric constant of water (80) and the ice (5) is greater  than the dielectric constant of air (1), so the sensor can determine the presence or absence of moisture using  this method. The measurements are read at the given intervals, and the moisture content of the list is determined. Unlike similar sensors there is no need for coloring or calibration. It is placed in the crown on a branch of a plant.


Technical characteristics of the leaf wetness sensor

Mesuring time

10 ms


3,3 V


One drop of water

Working area                                    

-10 ° C do 60 ° C

Expected life span

2 + years of continuous use

Dimensions of the probes

Diametar 72  mm x  thickness 1 mm

Cable lenght                                     

2,5 m standard

Connection type                                   

3,5 mm connector


12 Months