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DAVIS INSTRUMENTS

6420 -- Leaf Wetness Sensor, Vantage Pro® and Vantage Pro2™

Category: WEATHER

Model: Optional Sensors

Avaibility: AVAILABLE

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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? (12 m) cable.

Specifications :

Sensor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Artificial leaf electrical resistance

Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bipolar (3V nominal) built-in

Time Constant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 seconds

Attached Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . 40' (12 m)

Note: Increasing the cable length above the recommended maximum cable length causes measurement error in the form of lower leaf wetness readings.

Cable Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-conductor, 26 AWG

Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modular connector (RJ-11)

Recommended Maximum Cable Length (see Note 1). . . . . 200' (61 m) using 4-conductor 26 AWG cable

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 15

Dry/Wet Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User-selectable

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.5 to 75 seconds

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