NEW APOGEE INSTRUMENTS SQ-204X

Power Supply: 7 to 24 V DC with a maximum current draw 22 mA (2 mA quiescent current draw)
Sensitivity: 0.004 mA per mmol m-2 s-1
Calibration Factor: 250 mmol m-2 s-1 per mA
Calibration Uncertainty: +/- 5 %
Calibrated Output Range: 4 to 20 mA
Measurement Repeatability: Less than 0.5 %
Non-stability (Long-term Drift): Less than 2 % per year
Non-linearity: Less than 1 % (up to 4000 mmol m-2 s-1)
Response Time: Less than 1 ms
Field of View: 180 deg
Spectral Range: 370 nm to 650 nm (wavelengths where response is greater than 50 % of maximum)
Directional (Cosine) Response: +/- 5 % at 75 deg zenith angle
Temperature Response: Less than 0.5 % from -20 to 50 C
Operating Environment: -20 to 60 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m