	SU-100-SS	SU-420
Output (Sensitivity)	0.2 mV per µmol m^-2 s^-1, 0.61 mV per W m^-2	-
Resolution	-	0.1 W m^-2
Calibration Factor (Reciprocal of Output)	5 µmol m^-2 s^-1 per mV, 1.65 W^-2 per mV	Custom for each sensor and stored in firmware
Calibration Uncertainty	± 10 %	± 10 %
Current Draw	-	61 mA (when logging)
Measurement Repeatability	Less than 1 %	Less than 1 %
Long-term Drift (Non-stability)	Less than 3 % per year	Less than 3 % per year
Non-linearity	Less than 1 % (up to 300 µmol m^-2 s^-1)	Less than 1 % (up to 300 µmol m^-2 s^-1)
Response Time	Less than 1 ms	Software updates every second
Field of View	180°	180°
Spectral Range	250 to 400 nm	250 to 400 nm
Directional (Cosine) Response	± 10 % at 75° zenith angle	± 10 % at 75° zenith angle
Temperature Response	Approximately 0.1 % per C	Approximately 0.1 % per C
Operating Environment	-40 to 70 C, 0 to 100 % relative humidity	-40 to 70 C, 0 to 100 % relative humidity
Mass (with 5 m of cable)	75 g	90 g

Output (Sensitivity)

0.2 mV per µmol m^-2 s^-1, 0.61 mV per W m^-2

Resolution

0.1 W m^-2

Calibration Factor (Reciprocal of Output)

5 µmol m^-2 s^-1 per mV, 1.65 W^-2 per mV

Custom for each sensor and stored in firmware

Calibration Uncertainty

± 10 %

Current Draw