6
SPECIFICATIONS
Calibration Traceability
Apogee MQ series quantum meters are calibrated through side-by-side comparison to the mean of four Apogee model SQ-
110 or SQ-120 transfer standard quantum sensors under high output T5 cool white fluorescent lamps. The transfer standard
quantum sensors are calibrated through side-by-side comparison to the mean of at least three LI-COR model LI-190R
reference quantum sensors under high output T5 cool white fluorescent lamps. The reference quantum sensors are
recalibrated on a biannual schedule with a LI-COR model 1800-02 Optical Radiation Calibrator using a 200 W quartz halogen
lamp. The 1800-02 and quartz halogen lamp are traceable to the National Institute of Standards and Technology (NIST).
MQ-210
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 3000 µmol m
-2
s
-1
)
Response Time
Less than 1 ms
Field of View
180º
Spectral Range
410 to 655 nm (wavelengths where response is greater than 50 % of maximum;
see Spectral Response below)
Directional (Cosine)
Response
± 5 % at 75º zenith angle (see Cosine Response below)
Temperature Response
0.06 ± 0.06 % 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
24 mm diameter; 28 mm height
Mass
180 g
Cable
2 m of two conductor, shielded, twisted-pair wire; additional cable available; santoprene rubber jacket
(high water resistance, high UV stability, flexibility in cold conditions)
