Apogee SE-421 Owner's Manual - Page 6
Browse online or download pdf Owner's Manual for Accessories Apogee SE-421. Apogee SE-421 19 pages. Ultraviolet-a sensor
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SPECIFICATIONS
Power Supply
Current Draw
Calibration Factor
Calibration Uncertainty
Measurement Range
Measurement Repeatability
Long-term Drift
Non-linearity
Response Time
Field of View
Spectral Range
Directional (Cosine) Response
Temperature Response
Operating Environment
Dimension
Mass (5 m of cable)
Cable
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).
Custom for each sensor and stored in the firmware
0.6 s, time for detector signal to reach 95 % following a step change; fastest data
transmission rate for SDI-12 circuitry is 1 s
300 to 400 nm (wavelengths where response is greater than 10 % of maximum; see
-30 to 85 C; 0 to 100 % relative humidity
30.5 mm diameter, 37 mm height
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
SU-221-SS
5.5 to 24 V DC
1.4 mA (quiescent), 1.8 (active)
± 10 %
-2
0 to 100 W m
Less than 0.5 %
Less than 2 % per year
Less than 1 %
180°
Spectral Response below)
± 2 % at 45°, ± 5 % at 75°
Less than 0.1 % per C
140 g