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Extended Range PFD Sensor

Apogee Instrument's extended range PFD sensors/meters provide a research grade measurement of photon flux density (PFD) beyond the standard range of 400-700 nm (PAR).
Measure photon flux density (PFD) from 340-1040 nm
Apogee’s new extended range photon flux density (PFD) sensors are for measuring the newest generation of LED grow lights with wavelengths outside the traditional 400-700 nm PAR range. Research has shown the value of adding UV and far-red LEDs to achieve various disease control and photomorphogenic effects. The extended range filter of the SQ-620 allows it to measure photons from UV and Far-red. The 1040 nm top cutoff also means the sensor will measure the thermal output of HPS fixtures and other broad-spectrum lights above the range that influences plants; therefore, the sensor is intended only for use in LED environments.
Spectral Response
The Extended Range PFD sensor (model SQ-620) has a spectral range of 340 to 1040 nm ± 5 nm. The extended spectral response increases the accuracy of LED measurements. The spectral responses can be seen in the graph below.
Graph showing the spectral response of an Extended Range PFD sensor (spectral range of 340 to 1140 nm ± 5 nm.
Accurate, Stable Measurements
Sensors are cosine-corrected to maintain their accuracy when radiation comes from low zenith angles. The sensors measure PFD with a cosine response accurate within ± 5 % at 75° zenith angle. Long-term non-stability determined from multiple replicate quantum sensors in accelerated aging test and field conditions is less than 2 % per year.
Typical Applications
Typical applications of traditional quantum sensors include incoming PPFD measurement over plant canopies in outdoor environments or in greenhouses and growth chambers, and reflected or under-canopy (transmitted) PPFD measurement in the same environments. The Extended Range Quantum Sensor detailed in this manual uses a detector that is sensitive to radiation up to about 1100 nm, well beyond the range of wavelengths that influence photosynthesis and plant responses. This means this particular sensor should only be used for photon flux density measurements under LEDs.
An Apogee Extended Range PFD sensor head.
An Apogee Extended Range PFD sensor head.
Apogee Extended Range PFD sensors also available as handheld meter.
Rugged, Self-cleaning Housing
Patented domed shaped sensor head (diffuser and body) facilitate runoff of dew and rain to keep the sensor clean and minimize errors caused by dust blocking the radiation path. Sensors are housed in a rugged anodized aluminum body and electronics are fully potted.
Calibration
To ensure accuracy each sensor is carefully calibrated in controlled conditions and traceable to NIST reference standards. The full-spectrum sensors are pre-calibrated for all light sources.
Mounting
The AL-120 Solar Mounting Bracket with Leveling Plate facilitates mounting the sensor to a mast or pipe. The AL-100 Solar Sensor Leveling Plate is designed to level the sensor while sitting on a flat surface or mounting to a surface.
Output Options
Available in multiple analog outputs, SDI-12 digital output, as a "smart" sensor that uses USB communication and custom software, attached to a hand-held reader with a digital output, or with Apogee's new µCache Bluetooth Micro Logger.
High Quality Cable
Pigtail-lead sensors feature an IP68, marine-grade stainless-steel cable connector to simplify sensor removal for maintenance and recalibration. Cable is shielded-twisted pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions.
Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.

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PQ-620 Package: microCache and Extended Range PFD sensor with 30 cm cable
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PQ-620 Package: microCache and Extended Range PFD sensor with 30 cm cable

$619.00
PQ-622 Package: microCache and Extended Range PFD Sensor with 2 meter cable
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PQ-622 Package: microCache and Extended Range PFD Sensor with 2 meter cable

$639.00
MQ-620: 340-1040 nm Extended Range PFD Meter
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MQ-620: 340-1040 nm Extended Range PFD Meter

$568.00
SQ-620-SS 340-1040 nm Extended Range PFD Sensor
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SQ-620-SS 340-1040 nm Extended Range PFD Sensor

$415.00
SQ-622-SS 340-1040 nm 0-2.5 V output Extended Range PFD Sensor
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SQ-622-SS 340-1040 nm 0-2.5 V output Extended Range PFD Sensor

$460.00
SQ-624-SS 340-1040 nm 4-20 mA output Extended Range PFD Sensor
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SQ-624-SS 340-1040 nm 4-20 mA output Extended Range PFD Sensor

$515.00
SQ-625-SS 340-1040 nm 0-5 V output Extended Range PFD Sensor
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SQ-625-SS 340-1040 nm 0-5 V output Extended Range PFD Sensor

$460.00
SQ-626: 340-1040 nm USB output Extended Range PFD Sensor
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SQ-626: 340-1040 nm USB output Extended Range PFD Sensor

$465.00
SQ-627-SS 340-1040 nm SDI-12 Extended Range PFD Sensor
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SQ-627-SS 340-1040 nm SDI-12 Extended Range PFD Sensor

$515.00
AT-100 microCache Bluetooth Micro Logger
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AT-100 microCache Bluetooth Micro Logger

$319.00
AA-100: Protective Carrying Case
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AA-100: Protective Carrying Case

$24.00
AL-100: Solar Sensor Leveling Plate
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AL-100: Solar Sensor Leveling Plate

$44.00
AL-120 Solar Mounting Bracket with Leveling Plate
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AL-120 Solar Mounting Bracket with Leveling Plate

$64.00
AM-310: Sensor Wand
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AM-310: Sensor Wand

$62.00

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About Apogee Instruments, Inc.

Address:
721 West 1800 North
Logan, UT 84321
United States of America

Hours: Monday-Friday 8 AM- 5 PM MST

Main Line / Order Status: (435) 792-4700
or sales@apogeeinstruments.com

Technical Sales and Support: (435) 245-8012
or techsupport@apogeeinstruments.com

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  • products
    • Pyranometers
    • Quantum (PAR) Sensors / Meters
    • Daily Light Integral Measurement
    • Infrared Radiometers
    • Aspirated Radiation Shield
    • Spectroradiometers
    • Net Radiometer
    • Pyrgeometers
    • Humidity Probes
    • Temperature Sensors
    • Leaf and Bud Temperature Sensor
    • Oxygen Sensors
    • UV Sensors
    • Chlorophyll Concentration
    • Barometric Pressure
    • PAR Meters for Aquariums
    • microCache Bluetooth Micro Logger
    • Red - Far-red and PAR-FAR Sensors
    • Photometric Sensor
    • Solar Energy PV Monitoring
    • Accessories
    • Calibration Services
    • Replacement Cables
  • About Us
    • Contact Us
    • International Distributors
      • Apogee Instruments Distributors - Brazil
      • Apogee Distributor - Campbell Scientific Southeast Asia
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