New Apogee SQ-620/40 Quantum Meter

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This is great, as it measures UV as well as infra-red heat that can be used to directly compare the efficiency of different lighting sources. If only they could combine it with a spectrometer. I don't know why PAR is only measured between 400nm and 700nm considering far red light (730nm) plays such an important role in plant morphology and photosynthesis.
 
Excellent find and 4 y warranty on top. Getting a price quote as from my locals as i cant find it online. Does anyone know? And obviously how it would compare to a Licor?
 
accuracy wise the the apogee 520 is not that far off the accuracy of the Li-cor li-190r

going out to 1000nm is kind of overkill, you wont find anything past 800 with LEDs

i still recommend the cheap $150 hydrofarm quantum meters to people looking to do basic light measurements in their garden

this is more a tool for lighting designers/manufacturers, as a lot of people can come to wrong conclusions, like HPS PAR numbers would really be boosted by this but whats the point if its minimally photoactive?
 
CobKits said:
accuracy wise the the apogee 520 is not that far off the accuracy of the Li-cor li-190r

going out to 1000nm is kind of overkill, you wont find anything past 800 with LEDs

i still recommend the cheap $150 hydrofarm quantum meters to people looking to do basic light measurements in their garden

this is more a tool for lighting designers/manufacturers, as a lot of people can come to wrong conclusions, like HPS PAR numbers would really be boosted by this but whats the point if its minimally photoactive?
Click to expand...

so you see no benefit in being able to measure below 400? thats the interesting part, not being able to go up to 1000 :roll:
 
CobKits said:
accuracy wise the the apogee 520 is not that far off the accuracy of the Li-cor li-190r

going out to 1000nm is kind of overkill, you wont find anything past 800 with LEDs

i still recommend the cheap $150 hydrofarm quantum meters to people looking to do basic light measurements in their garden

this is more a tool for lighting designers/manufacturers, as a lot of people can come to wrong conclusions, like HPS PAR numbers would really be boosted by this but whats the point if its minimally photoactive?
Click to expand...
Hydrofarm might be more accurate than anything else. Any side by side comparisons between the best and lesser ?
 
interesting comparison on sensors (does not include latest offering SQ-620)


of interest are the graphs on pg 5 and the tables on pg 6.

apogee SQ-110 is not in the same class, and if i had to guess the hydrofarm would be right there with it. Again for light balancing of a garden (repeat measurments of same spectrum) either is still fine

even the li-cor isnt super accurate with HPS, none of them are super accurate with red LED. for our purposes +/- 2-3% is pretty minimal

by the metric of that paper, the response of the SQ-620 will exaggerate actual PAR (by definition of 400-700 nm) because it will sum data outside of the useful PAR range
 
I had the 620 sensor quoted at 486€ + tax. They want you to buy a data logger aswelll for 383 but not sure its needed. Will find out
 
We can all agree it's a tool, not a light lab:-P

Never trusted that hydrofarm one, but cobby has been vouching it for yrs now. He's right though, for canopy use , even a lux meter will do
 
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