Specification Sheet
Features
APOGEE QUANTUM METERS |
MQ-100, MQ-200, & MQ-300 Series
MQ-200
MQ-500
Mulple Output Opons
• Aached 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 direconal errors less than ± 5 %
at a solar zenith angle of 75°. Long-term non-stability less
than 2 % per year.
Unique Design
Cost-eecve, original quantum sensors work well for
broadband radiaon sources. The patented, dome-shaped
aluminum head is cosine-corrected, self-cleaning, and fully-
poed for a waterproof design.
Line Quantum Sensor Opons
Sensors are available with mulple detectors mounted
along the length of a rugged anodized aluminum bar, which
provide spaally averaged PPFD measurements along the
length of the bar.
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
Measure photosynthecally acve
radiaon (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
radiaon 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 deviaons above and below mean) compared
to PPFD weighng funcon. Spectral response measurements were
made at 10 nm increments across a wavelength of 300 to 800 nm in a
monochromator with an aached electric light source. Measured spectral
data from each quantum sensor were normalized by the measured spectral
response of the monochromator/electric light combinaon, which was
measured with a spectroradiometer.
Spectral Response
SQ-311