Specification Sheet

www.apogeeinstruments.com | 435.792.4700 | Logan , UT
Spectral Errors of Commercial
Quantum Sensors
Spectral errors are theorecal errors
calculated from sensor spectral
responses and spectral output of
radiaon sources. Only spectral errors
are listed in the table. Calibraon,
cosine, and temperature error can also
contribute to measurement error.
Spectral Errors
Dimensions
Sun (Clear Sky -2.2 0.0 -0.4 -1.0
Sun (Cloudy Sky) -1.7 1.4 -0.2 -1.3
Sun (Reected from Deciduous Leaves) -2.0 4.9 -0.8 1.1
Sun (Transmied below Wheat
Canopy)
-1.1 6.4 -0.1 -0.3
Cool White Fluorescent (T5) 0.0 0.0 0.0 0.0
Metal Halide 0.9 -3.7 0.2 -1.7
Ceramic Metal Halide -0.3 -6.0 0.4 -0.7
High Pressure Sodium 0.0 0.8 1.3 1.4
Red/Blue LED (16 % 444 nm, 84 %
667 nm peaks)
-3.4 -65.3 3.5 -1.8
Red/White LED (6.5 % 436 nm, 4.5 %
531 nm, 89 % 668 nm peaks)
-3.0 -60.3 2.6 -1.7
Apogee
SQ-500
Apogee
SQ-110
SQ-120
LI-COR
LI-190
Kipp &
Zonen
PQS 1
Mean spectral response measurements of six replicate Apogee SQ-100
and SQ-500 series quantum sensors. Spectral response measurements
were made at 10 nm increments across a wavelength range of 300 to 800
nm in a monochromator with an aached electric light source. Measured
spectral data from each quantum sensor were normalized by the measured
spectral response of the monochromator/electric light combinaon, which
was measured with a spectroradiometer.
Full-spectrum
Original
Spectral Response
Mean cosine response of seven Apogee SQ-500 quantum sensors.
Cosine response was calculated as the relave dierence of SQ-500
quantum sensors from the mean of replicate reference quantum sensors
(LI-COR models LI-190 and LI-190R, Kipp & Zonen model PQS 1). The
red data are AM measurements; the green data are PM measurements.
Cosine Response