Sensor Calibration
The SU-200 has a standard UV calibration factor of exactly:
10.0 W m
-2
per mV
Multiply this calibration factor by the measured mV signal to convert sensor output to UV-A in units of W m
-2
:
Calibration Factor (10 W m
-2
per mV) * Sensor Output Signal (mV) = UV-A (W m
-2
)
10 W m
-2
per mV * 6 mV = 60 W m
-2
Example of UV-A measurement with an Apogee UV-A sensor.
Full sunlight yields UV-A radiation on a horizontal plane at the
Earth’s surface of approximately 60 W m
-2
. This yields an
output signal of 6 mV. The signal is converted to UV-A
radiation by multiplying by the calibration factor of 10 W m
-2
per mV.
Full Sunlight
≈60 W m
-2
UV-A
Sensor Output
6 mV
