Specification Sheet

Features
APOGEE QUANTUM METERS |
MQ-100, MQ-200, & MQ-300 Series
MQ-200
MQ-500
Mulple Output Opons
Aached hand-held meter
• Separate sensor
• Line quantum meter- 3 sensors
• Line quantum meter- 6 sensors
• Line quantum meter- 10 sensors
Accurate, Stable Measurements
Cosine-corrected with direconal errors less than ± 5 %
at a solar zenith angle of 75°. Long-term non-stability less
than 2 % per year.
Unique Design
Cost-eecve, original quantum sensors work well for
broadband radiaon sources. The patented, dome-shaped
aluminum head is cosine-corrected, self-cleaning, and fully-
poed for a waterproof design.
Line Quantum Sensor Opons
Sensors are available with mulple detectors mounted
along the length of a rugged anodized aluminum bar, which
provide spaally averaged PPFD measurements along the
length of the bar.
Typical PPFD Measurement Applicaons
• Incoming and reected PPFD over and under plant
canopies in greenhouses, in elds, and in growth chambers
Aquac environments including salt water aquariums and
freshwater lakes and streams
Measure photosynthecally acve
radiaon (PAR) in μmol m⁻² s⁻¹
Mean cosine response of twenty-three SQ series quantum sensors.
Cosine response measurements were made by direct side-by-side
comparison to the mean of four reference thermopile pyranometers, with
solar zenith angle-dependent factors applied to convert total shortwave
radiaon to PPFD. Blue points represent the AM response and red points
represent the PM response.
Cosine Response
Mean spectral response of six SQ series quantum sensors (error bars
represent two standard deviaons above and below mean) compared
to PPFD weighng funcon. Spectral response measurements were
made at 10 nm increments across a wavelength 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.
Spectral Response
SQ-311

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