Menu
Apogee Instruments, Inc.
  • Home
  • Products
    • Quantum (PAR & ePAR) Sensors / Meters
    • Pyranometers
    • PAR, Daily Light Integral, and Photoperiod Meters
    • Oxygen Sensors
    • Chlorophyll Concentration
    • Infrared Radiometers
    • Spectroradiometers
    • Temperature Sensors
    • NDVI Sensors
    • PAR Meters for Aquariums
    • UV Sensors
    • Guardian CEA Multi-Sensor Monitor
    • Photometric Sensor
    • Net Radiometer
    • Cloudburst Weighing Precipitation Gauge
    • microCache Bluetooth Micro Logger
    • Barometric Pressure
    • Solar Energy PV Monitoring
    • Accessories
    • Pyrgeometers
    • Red - Far-red and PAR-FAR Sensors
    • Aspirated Radiation Shield
    • Humidity Probes
    • Refurbished Products
    • Radiation Frost Detector
    • Replacement Cables
    • Calibration Services
  • ABOUT US
    • Contact Us
    • ISO 9001:2015 Certification
    • International Distributors
    • Careers
    • Apogee News
    • Newsletters
    • Company History
    • Event Calendar
    • Leadership Team
    • Apogee Cares
    • Our Founder - Dr. Bruce Bugbee
    • Wholesale Application
    • Customer Satisfaction Survey
  • Integrators
  • Support
  • Sign In / Register
  • Search
  • International Distributors
  • My Cart (0)
    Your cart is empty

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 X (black head), the ePAR (silver head), and a Quantum Light Pollution Sensor (silver head).

  1. 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.
  2. Our Original X Quantum Sensors feature a less expensive optical detector that is accurate for measuring broadband light sources like the sun. This sensor, however, can have significant errors under LED fixtures, especially if they are blue/red in color or a high fraction of red color. For these applications, we recommend our full spectrum sensor.
  3. Apogee's 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.
  4. 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.
For Apogee's 2-band sensors that measure PAR and Far-red, click here.
Apogee also offers a variety of meters and packages to measure daily light integral (DLI).
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 BlueTooth enabled 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 BlueTooth enabled microCache device.

Waterproof

Full-Spectrum

Learn More

ePAR

Learn More

Original X

Learn More

Light Pollution

Learn More



Original X 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 X 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 BlueTooth enabled microCache device.

Waterproof

Line Quantum Option
Measure a spatial average of PAR using a bar of 10 sensors.

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 BlueTooth enabled microCache device.

Waterproof

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

Shop by brand

  • Apogee

Shop by price

  • $0.00 - $157.00
  • $157.00 - $308.00
  • $308.00 - $458.00
  • $458.00 - $609.00
  • $609.00 - $759.00
PQ-110X Package: microCache and Original X Quantum with 2 m cable
Quick View

PQ-110X Package: microCache and Original X Quantum with 2 m cable

$569.00
PQ-100X Package: microCache and Original X Quantum with 30 cm cable
Quick View

PQ-100X Package: microCache and Original X Quantum with 30 cm cable

$539.00
PQ-612 Package: microCache and ePAR Sensor with 2 meter cable
Quick View

PQ-612 Package: microCache and ePAR Sensor with 2 meter cable

$759.00
PQ-610 Package: microCache and ePAR sensor with 30 cm cable
Quick View

PQ-610 Package: microCache and ePAR sensor with 30 cm cable

$729.00
PQ-640 Package: microCache and Quantum Light Pollution Sensor with 30 cm cable
Quick View

PQ-640 Package: microCache and Quantum Light Pollution Sensor with 30 cm cable

$649.00
PQ-510 Package: microCache and Full-spectrum Quantum with 2 meter cable
Quick View

PQ-510 Package: microCache and Full-spectrum Quantum with 2 meter cable

$649.00
PQ-500 Package: microCache and Full-spectrum Quantum with 30 cm cable
Quick View

PQ-500 Package: microCache and Full-spectrum Quantum with 30 cm cable

$619.00
MQ-500: Full-Spectrum Quantum Meter
Quick View

MQ-500: Full-Spectrum Quantum Meter

$549.00
MQ-200X Quantum Separate Sensor with Handheld Meter
Quick View

MQ-200X Quantum Separate Sensor with Handheld Meter

$389.00
MQ-610: 400-750 nm ePAR Meter
Quick View

MQ-610: 400-750 nm ePAR Meter

$599.00
MQ-510: Full-Spectrum Underwater Quantum Meter
Quick View

MQ-510: Full-Spectrum Underwater Quantum Meter

$559.00
MQ-650: ePAR Underwater Meter
Quick View

MQ-650: ePAR Underwater Meter

$609.00
MQ-210X Underwater Quantum Meter
Quick View

MQ-210X Underwater Quantum Meter

$389.00
DLI-400: PAR, Daily Light Integral, and Photoperiod Meter (Sunlight Only, 400-700 nm)
Quick View

DLI-400: PAR, Daily Light Integral, and Photoperiod Meter (Sunlight Only, 400-700 nm)

$299.00
DLI-500: PAR, Daily Light Integral, and Photoperiod Meter (Full-Spectrum, 400-700 nm)
Quick View

DLI-500: PAR, Daily Light Integral, and Photoperiod Meter (Full-Spectrum, 400-700 nm)

$499.00
DLI-600: ePAR, Daily Light Integral, and Photoperiod Meter (ePAR, 400-750 nm)
Quick View

DLI-600: ePAR, Daily Light Integral, and Photoperiod Meter (ePAR, 400-750 nm)

$529.00
Apogee Instruments SQ-500 Full-spectrum Quantum Sensor
Quick View

SQ-500-SS: Full-Spectrum Quantum Sensor

$404.00
Apogee Instruments SQ-512 Amplified 0-2.5 V Full-spectrum Quantum Sensor
Quick View

SQ-512-SS: Amplified 0-2.5 V Full-Spectrum Quantum Sensor

$459.00
Apogee Instruments SQ-514 Full-spectrum Quantum Sensor
Quick View

SQ-514-SS: Full-Spectrum 4-20 mA output

$509.00
Apogee Instruments SQ-515  Amplified 0-5 V Full-spectrum Quantum Sensor
Quick View

SQ-515-SS: Amplified 0-5 V Full-Spectrum Quantum Sensor

$459.00
Apogee Instruments SQ-520 USB Smart Full-spectrum Quantum Sensor
Quick View

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

$469.00
SQ-521 SDI-12 Digital Output Full-spectrum Quantum Sensor
Quick View

SQ-521-SS SDI-12 Digital Output Full-spectrum Quantum Sensor

$599.00
Apogee Instruments SQ-522 Full-spectrum Quantum Sensor
Quick View

SQ-522-SS Modbus Digital Output Full-spectrum Quantum Sensor

$614.00
SQ-100X-SS: Original Quantum Sensor
Quick View

SQ-100X-SS: Original Quantum Sensor

$219.00
SQ-202X-SS: Amplified 0-2.5 Volt Original Quantum Sensor
Quick View

SQ-202X-SS: Amplified 0-2.5 Volt Original Quantum Sensor

$284.00
SQ-204X-SS Amplified 4-20 Milliamp Original Quantum Sensor
Quick View

SQ-204X-SS Amplified 4-20 Milliamp Original Quantum Sensor

$284.00
SQ-205X-SS Amplified 0-5 Volt Original Quantum Sensor
Quick View

SQ-205X-SS Amplified 0-5 Volt Original Quantum Sensor

$284.00
SQ-420X Smart Quantum Sensor | USB Output
Quick View

SQ-420X Smart Quantum Sensor | USB Output

$259.00
SQ-421X-SS SDI-12 Digital Output Quantum Sensor
Quick View

SQ-421X-SS SDI-12 Digital Output Quantum Sensor

$384.00
SQ-422X-SS Modbus Digital Output Quantum Sensor
Quick View

SQ-422X-SS Modbus Digital Output Quantum Sensor

$399.00
SQ-610-SS 400-750 nm ePAR Sensor
Quick View

SQ-610-SS 400-750 nm ePAR Sensor

$449.00
SQ-612-SS 400-750 nm 0-2.5 V output ePAR Sensor
Quick View

SQ-612-SS 400-750 nm 0-2.5 V output ePAR Sensor

$499.00
SQ-614-SS 400-750 nm 4-20 mA output ePAR Sensor
Quick View

SQ-614-SS 400-750 nm 4-20 mA output ePAR Sensor

$549.00
SQ-615-SS 400-750 nm 0-5 V output ePAR Sensor
Quick View

SQ-615-SS 400-750 nm 0-5 V output ePAR Sensor

$499.00
SQ-616: 400-750 nm USB output ePAR Sensor
Quick View

SQ-616: 400-750 nm USB output ePAR Sensor

$499.00
SQ-617-SS 400-750 nm SDI-12 ePAR Sensor
Quick View

SQ-617-SS 400-750 nm SDI-12 ePAR Sensor

$619.00
SQ-618-SS Modbus Digital Output 400-750 nm ePAR Sensor
Quick View

SQ-618-SS Modbus Digital Output 400-750 nm ePAR Sensor

$634.00
SQ-640-SS Quantum Light Pollution Sensor
Quick View

SQ-640-SS Quantum Light Pollution Sensor

$459.00
Apogee Instruments SQ-301X Line Quantum with 10 Sensors
Quick View

SQ-301X-SS: Line Quantum with 10 Sensors

$559.00
MQ-301X: Line Quantum with 10 Sensors and Handheld Meter
Quick View

MQ-301X: Line Quantum with 10 Sensors and Handheld Meter

$719.00
AT-100 microCache Bluetooth Micro Logger
Quick View

AT-100 microCache Bluetooth Micro Logger

$369.00
AA-100: Protective Carrying Case
Quick View

AA-100: Protective Carrying Case

$29.00
AL-120 Solar Mounting Bracket with Leveling Plate
Quick View

AL-120 Solar Mounting Bracket with Leveling Plate

$89.99
AL-100: Solar Sensor Leveling Plate
Quick View

AL-100: Solar Sensor Leveling Plate

$59.99
AM-310: Telescopic Sensor Wand
Quick View

AM-310: Telescopic Sensor Wand

$74.99
AM-330 Telescopic Water Submersible Sensor Wand
Quick View

AM-330 Telescopic Water Submersible Sensor Wand

$49.99
Apogee Instruments AL-210 Meter Leveling Plate/Mounting Bracket
Quick View

AL-210 :Meter Leveling Plate / Mounting Bracket

$79.00
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.
Quick View

AM-001: Meter Mounting Bracket

$29.99
AC-110: Communication Adapter
Quick View

AC-110: Communication Adapter

$44.99
AC-100: Communication Cable
Quick View

AC-100: Communication Cable

$99.00

Compare Products

 
  • 1
  • 2
Next

Subscribe to Our newsletter

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

Support

  • Technical Sales & Support
  • Recalibration & Repairs
  • FAQs & Alerts
  • Software Downloads
  • Datalogger Programs
  • Mobile Apps
  • Submit a Software Bug Report
  • Unit Conversions
  • RoHS, REACH, and PROP65 Statement
  • Sign In / Register
  • Wishlists
  • Sitemap

Product Information

  • Product Catalog
  • Case Studies
  • Product Manuals
  • Specification Sheets
  • Technical Drawings

Purchase

  • Ordering Information
  • Shipping
  • Quote Request
  • Returns & Warranty
  • Policies
  • International Distributors
  • Distributor Center
  • Wholesale Application
  • Integrators
  • Customer Satisfaction Survey

Company

  • Contact Us
  • Upcoming Infrared Radiometer Webinar
  • Company History
  • Our Founder, Dr. Bruce Bugbee
  • Apogee Cares
  • Apogee News
  • Apogee Newsletters
  • Event Calendar
  • Leadership Team
  • Careers
  • ISO 9001:2015 Certification
© Apogee Instruments, Inc.

Search in Apogee Instruments, Inc.

Cart Checkout
  • products
    • Quantum (PAR & ePAR) Sensors / Meters
    • Pyranometers
    • PAR, Daily Light Integral, and Photoperiod Meters
    • Oxygen Sensors
    • Chlorophyll Concentration
    • Infrared Radiometers
    • Spectroradiometers
    • Temperature Sensors
    • NDVI Sensors
    • PAR Meters for Aquariums
    • UV Sensors
    • Guardian CEA Multi-Sensor Monitor
    • Photometric Sensor
    • Net Radiometer
    • Cloudburst Weighing Precipitation Gauge
    • microCache Bluetooth Micro Logger
    • Barometric Pressure
    • Solar Energy PV Monitoring
    • Accessories
    • Pyrgeometers
    • Red - Far-red and PAR-FAR Sensors
    • Aspirated Radiation Shield
    • Humidity Probes
    • Refurbished Products
    • Radiation Frost Detector
    • Replacement Cables
    • Calibration Services
  • About Us
    • Contact Us
    • ISO 9001:2015 Certification
    • International Distributors
    • Careers
    • Apogee News
    • Newsletters
    • Company History
    • Event Calendar
    • Leadership Team
    • Apogee Cares
    • Our Founder - Dr. Bruce Bugbee
    • Wholesale Application
    • Customer Satisfaction Survey
  • Integrators
  • Support
  • Account
    • Sign In / Register
    • Wishlists
    • Returns
More Info