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Apogee Instruments - Model MQ-501 - FULL-SPECTRUM QUANTUM METER (MQ-501)
FromVirtual Hydromet
Apogee SQ-500 sensors are calibratedthrough side-by-side comparison to the meanof four transfer standard sensors under T5cool white fluorescent lamps. The transferstandard sensors are calibrated through sideby-side comparison to the mean of at leastfour quantum sensors under T5 cool whitefluorescent lamps traceable to the NationalInstitute of Standards and Technology (NIST).