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This product has been discontinued. The newer version is available here: SQ-420X. If your SQ-420 has a serial number before 1258, follow these update instructions. The new SQ-420 smart quantum...
Resolution
0.1 µmol mˉ² sˉ¹
Calibration Factor
Custom for each sensor and stored in the firmware
Calibration Uncertainty
± 5 %
Measurement Repeatability
Less than 0.5 %
Non-stability (Long-term Drift)
Less than 2 % per year
Non-linearity
Less than 1% (up to 4000 µmol mˉ² sˉ¹)
Response Time
Software updates every second
Field of View
180˚
Spectral Range
410 nm to 655 nm (wavelegnths where response is greater than 50% of maximum)
Spectral Selectivity
Less than 10 % from 469 to 655 nm
Directional (Cosine) Response
± 5 % at 75˚ zenith angle
Temperature Response
0.06 ± 0.06 % per C
Operating Environment
-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m
Dimensions
24 mm diameter, 33 mm height
Mass
Sensor head weighs 90 g
USB Cable
4.5 m (15 ft)
Current Draw
61 mA
Warranty
4 years against defect in materials and workmanship
$483.07
FOR SCIENTISTS & SERIOUS GROWERS - Designed by world-renowned crop physiologist, Bruce Bugbee, PhD, the SQ-520 full-spectrum quantum USB sensor is the premium tool of choice among leading...
Resolution
0.1 µmol mˉ² sˉ¹
Calibration Factor
Custom for each sensor and stored in the firmware
Calibration Uncertainty
± 5 %
Measurement Repeatability
Less than 1 % up to 4000 µmol mˉ² sˉ¹
Long-term Drift
Less than 2 % per year
Non-linearity
Less than 1 % (up to 4000 µmol mˉ² sˉ¹)
Response Time
Software updates every second
Field of View
180˚
Spectral Range
389 to 692 nm ± 5 nm (wavelengths where response is greater than 50 % of maximum)
Spectral Selectivity
Less than 10 % from 412 to 682 nm ± 5 nm
Directional (Cosine) Response
± 2 % at 45 ˚, ± 5 % at 75 ˚
Azimuth Error
Less than 0.5 %
Tilt Error
Less than 0.5 %
Temperature Response
-0.11 ± 0.04 % Cˉ¹
Uncertainty in Daily Total
Less than 5 %
Detector
Blue-enhanced silicon photodiode
Housing
Anodized aluminum body with acrylic diffuser
IP Rating
IP68
Operating Environment
-40 to 70 C; 0 to 100 % relative humidity; can be submerged to depths of 30 m
Dimensions
24 mm diameter, 37 mm height
USB Cable
4.5 m (15 ft)
Mass
100 g (with 5 m of lead wire)
Current Draw
61 mA
Warranty
4 years against defects in materials and workmanship
Manufactured
Made in the USA