naoki
Well-Known Member
I happen to find this document by Apogee comparing many different quantum sensors (probably they covered all available ones):
https://www.apogeeinstruments.com/content/Comparison-of-Eight-Quantum-Sensor-Models.pdf
Some results are quite interesting (e.g. how Hydrofarm lied about the spectral response).
Also, here is another comparison of Apogee, Li-Cor, and Seneye (which might be ok for reef aquarium, but not for plants):
BRS also have 7 day rental for Apogee (MQ-510 and MQ-210). These have the calibration factors for underwater application, so to use them for plants, you need to divide the PPFD values of MQ-510 and MQ-210 by 1.32 and 1.08, respectively (info about Immersion Effect Correction Factors).
https://www.apogeeinstruments.com/content/Comparison-of-Eight-Quantum-Sensor-Models.pdf
Some results are quite interesting (e.g. how Hydrofarm lied about the spectral response).
Also, here is another comparison of Apogee, Li-Cor, and Seneye (which might be ok for reef aquarium, but not for plants):
BRS also have 7 day rental for Apogee (MQ-510 and MQ-210). These have the calibration factors for underwater application, so to use them for plants, you need to divide the PPFD values of MQ-510 and MQ-210 by 1.32 and 1.08, respectively (info about Immersion Effect Correction Factors).