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 submerisble and suitable for use in all climate conditions
Reliable Accuracy
To ensure accuracy each sensor iscarefully calibrated in controlled conditions and traceable to NIST reference standards
Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.
Where is the MQ-500 used?
The MQ-500 is used to measure incoming PPFD measurements in outdoor environments, greenhouses, growth chambers, and aquariums.
Specifications
Calibration Uncertainty: ± 5 %
Measurement Range: 0 to 4000 µmol m-2 s-1
Measurement Repeatability: less than 0.5 %
Long-term Drift: 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 %
Tilt Error: less than 0.5 %
Temperature Response: -0.11 ± 0.03 % C-1
Uncertainty in Daily Total: less than 5 %
Detector: blue-enhanced silicon photodiode
Housing: anodized aluminum body with acrylic diffuser
IP Rating: IP68
Operating Environment: 0 to 50 C; less than 90 % non-condensing relative humidity up to 30 C; less than 70 % non-condensing relativity humidity from 30 to 50 C; seperate sensors can be submerged in water up to depths of 30 m
Meter Dimensions: 126 mm length; 70 mm width; 24 mm height
Sensor Dimesions: 24 mm diameter; 37 mm height
Mass: 100 g (with 5 m of lead wire)
Cable: 2 m of shielded, twisted-pair wire; additional cable available; santoprene rubber jacket
Warranty: 4 years against defects in materials and workmanship
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