Find out more information on the Davis Leaf Wetness sensor below. Not sure what leaf wetness sensor you have? Check out the Understanding Leaf Wetness page to identify which sensor you have.
How does the Davis leaf wetness sensor work?
The Davis Leaf Wetness Sensor is used to detect the presence of surface moisture on foliage and calculate the duration of wetness. When moisture is present, the sensor detects an electrical resistance change between the gold-plated elements of the grid.
The sensor is an artificial-leaf electrical-resistance type. It consists of a sensing grid, low-voltage bi-polar excitation circuit, and conductivity-sensing circuit. It measures the conductivity across the grid and displays the result as a moisture level, scaled from 0 (dry) to 15 (wet). In most cases leaves are considered “wet” once the moisture level is 8 or above. Typically this leaf wetness sensor is mounted at 45° angle to simulate a typical hanging leaf.
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What are the technical specifications of the Davis Leaf Wetness sensor?
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Useful information for the Davis Leaf Wetness sensor