Comparison Chart
Spectral Errors
Features
APOGEE QUANTUM SENSORS |
Original & Full-Spectrum Series
Apogee Instruments Quantum Sensors are the
tool of choice for researchers and agricultural
professionals measuring photosynthecally acve
radiaon (PAR) all over the world. Apogee oers
two types of quantum sensors: a Full-spectrum
Quantum (previously gold) and Original Quantum
Sensor. Consult our spectral response graph to
decide which model is right for your applicaon.
Accurate, Stable Measurements
Cost-eecve, original quantum sensors work
well for broadband radiaon sources (sun,
high-pressure sodium, metal halide, cool white
uorescent lamps), while full-spectrum sensors
are good for all light sources, including LEDs.
Oers a self-cleaning, cosine-corrected head that
is fully-poed for a waterproof design.
Typical PPFD Measurement
Applicaons
• Incoming and reected PPFD over and under
plant canopies in greenhouses, in elds, and in
growth chambers
• Aquac environments including salt water
aquariums and freshwater lakes and streams
Calibraon Traceability
Apogee SQ series quantum sensors are calibrated
through side-by-side comparison to
the mean of four transfer standard sensors under
a reference lamp. The reference sensors are
recalibrated with a quartz halogen lamp traceable
to the Naonal Instute of Standards and
Technology (NIST).
The photosynthecally acve
radiaon measurement tool of
choice for lighng researchers
Sun (Clear Sky) -2.2 0.0 -0.4 -1.0
Sun (Cloudy Sky) -1.7 1.4 -0.2 -1.3
Sun (Reected from Deciduous
Leaves)
-2.0 4.9 -0.8 1.1
Sun (Transmied 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
Above: Spectral response of original quantum sensor (black) and full-
spectrum quantum sensor (blue) compared to dened response of plants
to radiaon (dashed).