Leaf Wetness Sensor, Vantage ProA(R) and Vantage Pro2(TM)Use to monitor the level of surface moisture on foliage, with range from 0 (completely dry) to 15 (saturated). Add up to 2 sensors to a single Wireless Leaf & Soil Moisture/Temperature Station. Includes 40' (12M) cable.Compatible with both original Vantage Pro and Vantage Pro2. The Leaf Wetness Sensor must be connected via a Leaf & Soil Moisture/Temperature Station (#6345).