The Leaf wetness Phytos 31 sensor probe (Decagon Phytos 31) measures leaf surface wetness by measuring the dielectric constant of the sensor’s upper surface. This sensor has very high resolution, which gives you the ability to detect very small amounts of water (or ice) on the sensor surface. Water on the sensor surface does not need to bridge electrical traces to be detected, as is common with resistance-based surface wetness sensors.
Specifications
Operating temperature: -20 to 60 ºC
Measurement time: 10 ms
Probe dimensions: 11.2 cm x 5.8 cm x .075 cm
Cable length: 5 m