Decagon's LWS leaf wetness sensor is standardized, calibrated, and designed to detect wetness (presence and duration) and ice formation right out of the box. No painting, baking, or user calibration required.
Each sensor is precisely factory-calibrated to detect tiny amounts of water and/or ice on the leaf surface. The sensor surface coating is non-hygroscopic, eliminating false wetness detection.
Mimics a Real Leaf
The sensor’s thin (0.65 mm) fiberglass construction closely approximates the overall radiation balance of a healthy leaf, so moisture will condense and evaporate from the sensor at the same rate as it would on a normal leaf.
Plug and Read
Get straight to the data with the Em50 series of data loggers. Just install the sensor, plug it into the Em50, set the clock and measurement intervals, and start logging leaf wetness data. No programming required.
Use the Leaf Wetness Sensor:
LEAF WETNESS SENSOR
|Measurement Speed:||10 ms|
|Sensor Type:||Frequency domain|
|Output:||320 – 1000 mV @ 3 V excitation|
|Operating Environment:||-40°C to 50°C|
|Power:||2.5 VDC @ 2 mA, to 5 VDC @ 7 mA|
|Cable Length:||5 m standard, custom lengths available|
|Cable Connector Types:||3.5 mm “stereo” plug or stripped and tinned lead wires (3)|
|Sensor Dimensions:||11.2 cm x 5.8 cm x .075 cm|
|Data Logger compatibility (not exclusive):||Decagon Em50 Series, ProCheck|
|EXPECTED LIFETIME:||2 + years of continuous use|
|Warranty:||One year, parts and labour|
The LWS measures leaf surface wetness by measuring the dielectric constant of the sensor’s upper surface. It has a very low power requirement, which gives you the ability to make as many measurements as you want over a long period of time (such as a growing season) with minimal battery usage. This sensor also 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.
This means that the LWS does not need to be painted before use, which eliminates the need for individual sensor calibration.