SPECIFICATIONS
Calibration Traceability
Apogee MQX series quantum meters are calibrated through side-by-side comparison to the mean of four transfer
standard quantum sensors under a reference lamp. The reference quantum sensors are recalibrated with a 200 W
quartz halogen lamp traceable to the National Institute of Standards and Technology (NIST).
MQ-100X
MQ-200X
Calibration
Uncertainty
± 5 % (see calibration Traceability below)
Measurement
Repeatability
Less than 1 %
Long-term Drift
(Non-stability)
Less than 2 % per year
Non-linearity
Less than 1 % (up to 4000 µmol m
-2
s
-1
)
Response Time
Less than 1 ms
Field of View
180°
Spectral Range
370 to 650 nm (wavelengths where response is greater than 50 % of maximum; see
Spectral Response below)
Directional (Cosine)
Response
± 5 % at 75° zenith angle (see Cosine Response below)
Temperature
Response
-0.04 % per C (see Temperature Response below)
Operating
Environment
0 to 50 C; less than 90 % non-condensing relative humidity up to 30 C; less than 70 %
non-condensing relative humidity from 30 to 50 C; separate sensors can be
submerged in water up to depths of 30 m
Meter Dimensions
126 mm length; 70 mm width; 24 mm height
Sensor Dimensions
Integrated w/ Meter
24 mm diameter; 33 mm height
Mass
150 g
180 g
Cable
2 m of two conductor, shielded, twisted-pair wire; TPR jacket (high water resistance,
high UV stability, flexibility in cold conditions)
