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Sensor Calibration

All Apogee amplified UV sensor models SU-202 and SU-205 have a standard UV calibration factor of exactly:

The following example uses the SU-202 calibration factor and expected response under full sunlight:

Calibration Factor (0.04 W m

0.04

Full Sunlight

-2

60 W m

UV-A

SU-202: 0.04 W m

SU-205: 0.02 W m

-2

per mV) * Sensor Output Signal (mV) = UV-A (W m

Example of UV-A measurement with an Apogee SU-202

sensor. Full sunlight yields UV-A radiation on a horizontal

plane at the Earth's surface of approximately 60 W m

yields an output signal of 1500 mV. The signal is converted to

UV-A radiation by multiplying by the calibration factor of 0.04

-2

W m

per mV.

Sensor Output

1500 mV

-2

per mV

-2

per mV

-2

)

1500

-2

. This