Chapter 3 _________________________________________________________ Selecting Location
VAISALA_______________________________________________________________________ 55
Fuel Moisture/Fuel Temperature Sensor
Finding a suitable site for the fuel moisture sensor is important for
getting representative ambient measurements. The site should represent
the general area of interest.
You should install the fuel moisture sensor 0.3 m (1 ft.) above the forest
floor and orient the sensor parallel to the ground.
Fuel Moisture Sensor can monitor the moisture conditions on the forest
floor only if it can absorb and give up moisture near a fair sample of the
material that is naturally present. It must exchange moisture with the air
the same way that the forest floor materials do.
Mount the sensor on the south side of the tower (or the north side in the
southern hemisphere) so that it is not shadowed by the tower. If
possible, arrange that the sensor is exposed to sunlight for at least six
hours in the middle of the day. Make sure that no grass or other
vegetation touches the sensor; these can transfer moisture directly. The
sensor must be installed approximately one week before it can give
accurate fuel moisture readings.
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