APOGEE SQ-520 Quantum Sensor User Guide
APOGEE SQ-520 Quantum Sensor User Guide INTRODUCTION The SQ-521 Full-Spectrum Quantum sensor from Apogee Instruments, Inc. is a highaccuracy, single-band radiometer designed for continuous measurement of photosynthetic photon flux density (PPFD) or photosynthetically active radiation (PAR) measurement in indoor or…