Apogee MQ-500 PAR Meter, Best Seller, Lowest Prices. Here!

Demo Apogee Instruments MQ-500 Handheld Full Spectrum PAR Meter for PPFD


Regular price $ 532.00 $ 479.00 Sale

Includes a new warranty and free FGI soft pouch to protect your new meter. 

The Gold Standard For Traditional Photosynthetic Light Measurement

The MQ-500 is a full spectrum quantum sensor with a spectral range of 389 to 692 nm ± 5 nm, which can be seen in the graph pictured. This improved spectral response increases the accuracy of LED measurements.

Refined Spectral Response

The improved spectral response of the MQ-500 increases the accuracy of LED measurements making it ideal for use with both natural and electric light sources.

Cosine Response

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.

Rugged Design

Head is potted solid making it submersible and suitable for use in all climate conditions.

Warranty and Support

All Apogee products are backed by an industry-leading four-year warranty and outstanding customer support.


  • One MQ-500 PAR Meter and Sensor


  • AM-310 Extension Wand
  • AC-100 USB data and communications cable. 

Download Product Manual

  • Calibration Uncertainty ± 5 %
  • Measurement Range 0 to 4000 µmol m-2 s-1
  • Measurement Repeatability less than 0.5 %
  • Long-term Drift (Non-stability) less than 2 % per year
  • Non-linearity less than 1 % (up to 4000 µmol m-2 s-1)
  • Response Time less than 1 ms
  • 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 ± 5 % at 75 ° zenith angle
  • Azimuth Error less than 0.5 %
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