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SPECIFICATIONS

Sensitivity: 0.2 mV per µmol m

Calibration Factor: 5.0 µmol m

Calibration Uncertainty: ± 5 % (see Calibration Traceability below)

Measurement Repeatability: < 1 %

Non-stability (Long-term Drift): < 2 % per year

Non-linearity: < 1 % (up to 4000 µmol m

Response Time: < 1 ms

Field of View: 180

Spectral Range: 410 nm to 655 nm (wavelengths where response is greater than 50 % of maximum; see

Spectral Response below)

Directional (Cosine) Response: ± 5 % at 75

Temperature Response: 0.06 ± 0.06 % per C (see Temperature Response below)

Operating Environment: -40 to 70 C

Dimensions: SQ-110, -120: 2.4 cm diameter and 2.8 cm height

SQ-313, -316, -323, -326: 50 cm length, 1.5 cm width, 1.5 cm height

SQ-311, -321: 70 cm length, 1.5 cm width, 1.5 cm height

Mass: SQ-100 series: 90 g (with 5 m of lead wire)

SQ-313, -316, -323, -326: 275 g

SQ-311, -321: 375 g

Cable: 5 m of shielded, twisted-pair wire.

Additional cable available in multiples of 5 m

Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)

Pigtail lead wires

Calibration Traceability:

Apogee SQ series quantum sensors 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-190 reference quantum sensors under high

output T5 cool white fluorescent lamps. The reference quantum sensors are recalibrated on a biannual

-2

-1

-2

-1

per mV (reciprocal of sensitivity)

-2

-1

)

zenith angle (see Cosine Response below)

0 to 100 % relative humidity

Can be submerged in water up to depths of 30 m