Maintaining the PI Leaf wetness
The filter paper which is used as a sensing element for the leaf wetness sensor is destroyed after to many wettings and dryings. It has to be changed in dependence of rain frequency. If this sensing element is dirty, soiled by bird droppings, coated by spray materials (copper fungicide, etc.), physically damaged, or worn out, it should be replaced.
When you use copper spray material or are located near the sea please clean your leaf wetness sensor regularly with a soft brush and water. Salt and copper deposits on the sensor can create an electrically conductive connection between the 2 electrodes and the sensor will therefore not display the correct value.
Note: DO NOT clip the leave into the sensor the filter paper is simulating the green tissue of the leave.
Order number of the paper (sensing element): 600060 / 900044