Apogee Instruments - SQ-500 Full-Spectrum Quantum Sensor

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The Apogee SQ-500 full-spectrum quantum sensor measures PAR/PPFD from 400-700 nm with high accuracy, accurate under all light sources including LEDs. Choose the output that matches your controller or logger.All versions share the same research-grade detector (calibration uncertainty +/-5%, drift under 2%/yr, IP68); only the output differs.Available Options Unamplified analog, 5m cable (SQ-500-SS) USB smart sensor with software, 4.5m (SQ-520) SDI-12 digital output, 5m cable (SQ-521-SS) Modbus digital output, 5m cable (SQ-522-SS) Key Features Spectral range 400-700 nm +/- 5 nm Calibration uncertainty +/-5%, drift under 2%/yr Cosine-corrected, IP68 waterproof NIST-traceable, 4-year warranty Made in the USA and backed by Apogee's industry-leading warranty and support. Ideal Applications Continuous canopy PPFD monitoring Controller and datalogger integration Light-uniformity studies Show more