Campbell Scientific UT10 10 foot Tower w/ Grounding Kit and Hinged Base - Manual (Page 55)

UT10 Weather Station
8.5.14 237 Leaf Wetness Sensor
Mounting and orientation considerations are left to the user to determine.
Consult the 237 manual for preparation and other information. Normally, the
sensor is mounted away from the meteorological tower in or near a plant
canopy. The 237 Leaf Wetness Sensor is shown in FIGURE 8-28.
FIGURE 8-28. 237 Leaf Wetness Sensor
8.5.15 257 Soil Moisture Sensor
1. Soak the sensor end of the 257 (FIGURE 8-29) in irrigation water for 12 to
14 hours. Allow the sensor to dry for 1 to 2 days after soaking and repeat
the soak/dry cycle twice to improve sensor response. Always install a wet
sensor.
2. Install the sensor into soil representative of the field conditions you wish
to monitor. Avoid high or low spots. Placement south of the weather
station mast (northern hemisphere) will avoid the effects of the mast
shade. Installation in the root zone is best if measurements are used for
irrigation purposes.
3. The 257 should be removed from the soil prior to harvest or cultivation
operations to avoid damaging the sensor or sensor cable. Remove when
soil is moist.
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