SQ-520: Full-Spectrum Smart Quantum Sensor (USB)

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 software.

  • Product Name:Full-Spectrum Smart Quantum Sensor (USB)
  • Item No.:SQ-520
  • Manufacturers:Apogee
  • Country of Origin:USA

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 software. The sensor can also act as a stand-alone PAR datalogger by simply connecting it to most standard 5 V DC USB power plugs. Internal memory within the sensor head is capable of storing 10,000 user-specified periodic measurements that can be downloaded as a CSV file to a computer for analysis.


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.

sq-500-spectral-response.jpg


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 Apogee software (windows compatible, XP and later; Mac compatible, 10.10 and later). The included ApogeeConnect 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.


Internal Data Storage

The sensor has internal data storage capability with the ability to hold up to 10,000 measurements. This allows the sensor to collect data while connected to most stand-alone 5 V DC power supply such as a USB wall adapter.


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