Apogee USB Quantum Sensor SQ-520

Product Description

The new SQ-520 full-spectrum, smart quantum sensor can be connected directly to a computer via USB for taking spot measurements or graphing and datalogging real-time PPFD using the included ApogeeConnect software.

Application

The SQ-520 is used to measure incoming and reflected PPFD around plants and other organisms in outdoor environments, greenhouses, growth chambers, and underwater.

Refined Spectral Response

The improved spectral response of the SQ-520 increases the accuracy of LED measurements making it ideal for use with both natural and electric light sources.

No Datalogger Required

The sensor can be connected to a desktop, laptop, or tablet computer via USB 2.0 type A plug to be used with the ApogeeConnect software (Windows compatible, XP and later; Mac compatible, 10.10 and later). The included software gives the user control of data logging and calibration settings, provides a real time output display and graph of PPFD measurements and allows the data set to be saved as a csv file.

Specifications

Resolution 0.1 µmol m-2 s-1

Calibration Factor Custom for each sensor and stored in the firmware

Calibration Uncertainty ± 5 %

Measurement Repeatability Less than 1 % up to 4000 µmol m-2 s-1

Long-term Drift Less than 2 % per year

Non-linearity Less than 1 % (up to 4000 µmol m-2s-1)

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 ° zenith angle, ± 5 at 75 ° zeith angle

Azimuth Error Less than 0.5 %

Tilt Error Less than 0.5 %

Temperature Response -0.11 ± 0.03 % C-1

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 in water up to depths of 30 m

Dimensions 24 mm diameter, 37 mm height

USB Cable 4.6 m (15 ft)

Mass Sensor head weighs 90 g

Current Draw 11 mA

Warranty 4 years against defect in materials and workmanship