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Quantum (PAR) Sensors / Meters

Research grade measurement of photosynthetically active radiation (PAR), ePAR, PPF, and PPFD
Apogee Instruments Quantum sensors are the industry standard for measuring photosynthetically active radiation by agricultural professionals all over the world. We offer four types of quantum sensors; the Full Spectrum (blue head), the Original (black head), the ePAR (silver head), and a Quantum Light Pollution Sensor (silver head).
The Full-spectrum Quantum Sensors are our top-of-the-line models and feature an advanced optical detector that provides the highest accuracy PAR (aka PPFD) measurements (400-700 nm) under all light sources, including all modern narrow-band LEDs. Our Original Quantum Sensors feature a less accurate, but far less expensive, optical detector that is excellent for measuring broadband light sources like the sun and many electric lights, but is less accurate when measuring certain narrow-band LED colors. Apogee's new Extended Photosynthetically Active Radiation, or "ePAR" sensors are designed to make high-accuracy total photon flux intensity measurements of the newly recognized wider 400-750 nm ePAR range, which is a new photosynthetic radiation range some scientists are now measuring based on emerging research. Our Quantum Light-Pollution Sensors are designed to be highly sensitive to light to detect small light leaks in the 340-1040 nm range that can disrupt plant dark periods in sensitive plants. The light-pollution sensors are very specialized sensors that will over-range under normal light levels. Apogee also offers a variety of meters and packages to measure daily light integral (DLI).
Click each of the four sensor lines below to learn more. For Apogee's new 2-band sensors that measure PAR and Far-red, click here.
Full-Spectrum Quantum Sensors

Light Source
Provides accurate PAR measurements under all light sources, including LEDs.

Spectral Range
400 to 700 nm ± 5 nm (wavelengths where response is greater than 50 % of maximum)

SQ-500 full-spectrum quantum sensor spectral response graph.

Output Options
Available in multiple analog and digital outputs including unamplified, SDI-12, Modbus communication protocols, attached to a hand-held meter with a digital output, as a "smart" sensor that uses USB communication and custom software, or with Apogee's new microCache device.

Waterproof

Image of blue full-spectrum quantum and silver ePAR sensors.
ePAR Sensors

Light Source
Provides accurate measurements under all light sources.

Spectral Range
400 to 750 nm ± 5 nm (wavelengths where the response is greater than 50 % of maximum)

ePAR sensor spectral response graph.

Output Options
Available in multiple analog and digital outputs including unamplified, SDI-12, Modbus communication protocols, attached to a hand-held meter with a digital output, as a "smart" sensor that uses USB communication and custom software, or with Apogee's new microCache device.

Waterproof

Full-Spectrum

Learn More

ePAR

Learn More

Original

Learn More

Light Pollution

Learn More



Original Quantum Sensors

Light Source
Economical choice for excellent accuracy under broadband light sources like sunlight, high pressure sodium, and certain metal halides, but not for colored LEDs--although post-measurement mathematical correction factors can be applied to improve accuracy under LEDs. Click here for LED correction factors you can apply to our original sensors.

Spectral Range
370 to 650 nm (wavelengths where response is greater than 50 %)

SQ-100X original quantum sensor spectral response graph.

Output Options
Available in multiple analog and digital outputs including unamplified, SDI-12, Modbus communication protocols, attached to a hand-held meter with a digital output, as a "smart" sensor that uses USB communication and custom software, or with Apogee's new microCache device.

Waterproof

Line Quantum Option

Extended Range PFD and Quantum Light Pollution sensor head.
Quantum Light Pollution Sensors

Light Source
Detects stray photons that disrupt night that are critical in preventing negative effects in plants such as hermaphrodism and stunted growth.

Spectral Range
340 to 1040 nm ± 5 nm (wavelengths where response is greater than 50 % of maximum)

SQ-620 extended range PFD quantum sensor spectral response graph.

Output Options
Available in multiple analog outputs, SDI-12 digital output, or with Apogee's new microCache device.

Waterproof

  • Full-spectrum Quantum PAR Meters and Sensors
  • Quantum Light Pollution Sensors
  • Original Quantum Sensor
  • ePAR Sensors

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  • $0.00 - $140.00
  • $140.00 - $274.00
  • $274.00 - $409.00
  • $409.00 - $543.00
  • $543.00 - $678.00
AM-310: Telescopic Sensor Wand
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AM-310: Telescopic Sensor Wand

$62.00
AM-320 Water Submersible Sensor Wand
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AM-320 Water Submersible Sensor Wand

$62.00
Apogee Instruments AL-210 Meter Leveling Plate/Mounting Bracket
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AL-210 :Meter Leveling Plate / Mounting Bracket

$65.00
The AM-001 Meter Mounting Bracket is designed for handheld meters with solar radiation sensors attached via cable (MQ-200, MQ-500, MU-200, MP-200). The bracket mounts the sensor to the back of the meter, as seen in the image to the right, making it easier for the user to take sample measurements with the sensor and meter.
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AM-001: Meter Mounting Bracket

$18.00
AC-100: Communication Cable
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AC-100: Communication Cable

$62.00
AB-100: Meter Battery
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AB-100: Meter Battery

$5.00
AC-421 SDI-12 to USB Converter
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AC-421 SDI-12 to USB Converter

$130.00
AC-422 Modbus to USB Converter
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AC-422 Modbus to USB Converter

$150.00

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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
    • PAR, Daily Light Integral, and Photoperiod Meters
    • Pyranometers
    • Quantum (PAR & ePAR) Sensors / Meters
    • Infrared Radiometers
    • Aspirated Radiation Shield
    • Spectroradiometers
    • Net Radiometer
    • Pyrgeometers
    • Humidity Probes
    • Temperature Sensors
    • Radiation Frost Detector
    • 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
    • NDVI Sensors
    • Solar Energy PV Monitoring
    • Accessories
    • Calibration Services
    • Replacement Cables
    • Refurbished Products
  • About Us
    • Contact Us
    • ISO 9001:2015 Certification
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    • Apogee News
    • Newsletters
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