Leaf Wetness Sensor

Leaf Wetness Dielectric Sensor

Many fungal and bacterial diseases affect plants only when moisture is present on a leaf surface. The Leaf Wetness Sensor determines the presence and duration of canopy wetness, providing the ability to forecast disease and protect the plant canopy. Because the Leaf Wetness Sensor measures the dielectric constant, droplets do not need to bridge electrical traces for the sensor to detect moisture. The presence of water or ice anywhere on the surface of the sensor will be detected.

Applications

Disease forecasting and modeling
Ecological and Agricultural Research

Benefits

High resolution detects trace amounts of water or ice on the leaf surface
No painting or calibration necessary; factory calibration set at standard wetness threshold
Imitates characteristics of a real leaf
Low power requirements enable long-term monitoring (2+yrs. with Em50 logger)

Specifications

Measurement Time	10 milliseconds
Operating Environment	20 to 60°C
Expected Lifetime	2+ years continuous use
Power	2.5 VDC @ 2 mA to 5 VDC @ 7 mA
Output	250 to 1500 mV
Probe Dimensions	11.2 x 5.8 x .075 cm (4.4 x 2.3 x 0.029 in)
Cable Length	5 m standard, extension cables available
Connector Type	3.5 mm plug
Datalogger Compatibility*	Decagon Em50 and Em50R

Links and Brochures
Plant Science Instrumentation page
Commercial-grade Data Logger System Em50 page
Meteorology Instrumentation page
Decagon Products Directory
Download a printer-friendly version of Leaf Wetness Sensor information (140K PDF)

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