Apogee PAR (Full Spectrum)

Solar Radiation

The new SQ-500 Full Spectrum quantum sensor and MQ-500 Meter feature an improved detector that provides excellent measurements under all light sources, including LEDs, right out of the box.


  • The improved spectral response of the SQ-500 increases the accuracy of LED measurements making it ideal for use with both natural and electric light sources.
  • This cosine-corrected sensor is designed to maintain its accuracy when radiation comes from low zeith angles. The sensors measure PPFD with a cosine response accurate within ± 5 % at 75 ° zenith angle.
  • The SQ-500 is available as an unamplified analog version with pigtail leads to be connected to a datalogger. Output is 0.01 mV per µmol m-2 s-1
  • Amplified models to be released mid-2016
  • The MQ-500 is available attached to a handheld meter
  • Head is potted-solid making it submerisble and suitable for use in all climate conditions.
  • To ensure accuracy each sensor iscarefully calibrated in controlled conditions and traceable to NIST reference standards.
  • All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.



Leveling Bases

The AL-100 is required for sensors on cable.

The AL-210 is used for mounting meters with integral sensor.

Carry Case The AA-100 carry case is an optional accessory for protecting meters in the field
Mounting Brackets

The AM-110 fits the AL-100 leveling base and can be mounted directly to a mast or pipe with an outer diameter of 33-53 mm.

The AM-001 is designed to fit to the back of a meter for mounting a sensor on cable.

Sensor Wands

The AM-310 is for placing sensors in difficult to access places, such as underwater or under canopy.

The AM-320 is a salt water version.


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MQ-500 Specifications

File Size 1.12MB   Filename mq-500-spec-sheet.pdf   Download

SQ-500 Specifications

File Size 1.08MB   Filename sq-500-spec-sheet.pdf   Download

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