SPECIFICATIONS
Calibration Traceability
Apogee UV series sensors are calibrated through side-by-side comparison to the mean of four transfer standard UV
sensors under UV-enhanced T5 fluorescent tubes. The transfer standard UV sensors are calibrated through side-
by-side comparison to an Apogee model PS-300 spectroradiometer under sunlight (clear sky conditions) in Logan,
Utah. The PS-300 is calibrated with a quartz halogen lamp traceable to the National Institute of Standards and
Technology (NIST).
SU-200-SS
Power Supply
Self-Powered
Output (sensitivity)
0.1 mV per W m
-2
;
0.03 mV per µmol m⁻² s⁻¹
Calibration Factor (reciprocal of
sensitivity)
10 W m
-2
per mV;
30 µmol m⁻² s⁻¹ per mV
Calibration Uncertainty
± 10 %
Output Range
0 to 10 mV
Measurement Range
0 to 100 W m
-2
Measurement Repeatability
Less than 0.5 %
Long-term Drift
Less than 2 % per year
Non-linearity
Less than 1 %
Response Time
Less than 1 ms
Field of View
180°
Spectral Range
300 to 400 nm (wavelengths where response is greater than 10 % of maximum; see Spectral
Response below)
Directional (Cosine) Response
± 2 % at 45°, ± 5 % at 70°
Temperature Response
Less than 0.1 % per C
Operating Environment
-30 to 85 C; 0 to 100 % relative humidity
Dimension
30.5 mm diameter, 37 mm height
Mass (5 m of cable)
140 g
Cable
5 m of shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability,
flexibility in cold conditions); pigtail lead wires; stainless steel (316), M8 connector located
25 cm from sensor head
