The Leaf Wetness Sensor is a circuit board that has rows a parallel traces. The resistance between these traces will decrease as the sensor gets wet. The sensor has gold plated traces to keep oxidation to a minimum.

This sensor is designed for use with the Moisture Meter. This sensor must be used with our Moisture Meter or a comparable device. It provides the input needed by the Moisture Meter to report leaf wetness, but it does not directly report leaf wetness itself, and cannot be used independently.