5
3.1 Site Survey
Location of the outdoor sensor is paramount to good
data collection. Abbreviated instructions follow, but
for a detailed reference, see:
https://www.weather.gov/media/epz/mesonet/CWOP-
Siting.pdf
.
Perform a site survey before installing the rain sensor.
Consider the following:
Ideally mounted at a height of 4 to 6 feet, or 1.5 to
2 meters above the ground.
Ideally located at a horizontal distance of 4 times
the height, above the rain gauge, of the nearest
obstruction.
Ensure the rain gauge is mounted level to the
ground, away from any horizontal surface that can
introduce rain-splashing or surrounding snow
buildup.
Note:
If the rain gauge sensor was mounted less
than 3.3 feet or 1 meter above the ground,
the electromagnetic waves would be
absorbed by the earth when raining. Which
may cause inaccurate rainfall data
transmitting.
