Apogee Instruments USED-DEMO MQ-500 Full Quantum PAR Meter

Apogee Instruments USED-DEMO MQ-500 Full Quantum PAR Meter


Regular price $ 530.00 $ 495.00 Sale


Used/Demo Apogee MQ-500 with new Warranty

Apogee Instruments is proud to announce our new quantum sensor with an improved spectral response providing accurate PAR/PPFD measurements under all light sources, including LEDs.

includes quantum sensor and attached meter with cable. Optional accessories available. 

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 below. 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.

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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