The Pyranometer Sensor is
calibrated to measure the
shortwave radiation reaching
the Earth's
surface, measured in Joules m-2 s-1 or Watts m-2.
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Model SP-110: |
$169 |
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Model AL-100: |
$29 |
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SPECTRAL RESPONSE
A thermopile pyranometer measures all of the
energy between 280 and 2800 nm. However, about 90% of the
sunlight energy is between 300 to 1100 nm so silicon-cell
photodiode
pyranometers can be calibrated to estimate all of the
shortwave energy from sunlight.
NOTE ON USE OF THE APOGEE PYRANOMETER
All silicon-cell photodiode Pyranometers sub-sample the shortwave radiation
spectrum (from 300-1000 nm), and are calibrated to predict
all of the solar radiation (from 280 to 2800 nm). For this
reason, they should only be used to measure unobstructed
solar radiation. They should not be used to measure electric
lights, under canopies of vegetation or to measure reflected
radiation. |
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