Apogee SQ-420 USB Par Meter

[oreo54]

Honestly, I'd go with the new 600 series.

SQ-616: 400-750 nm USB output ePAR Sensor

The SQ-616 smart extended photosynthetically active radiation (ePAR) sensor can be connected directly to a computer to take spot measurements or graph and log real-time PFD using the included software.

www.apogeeinstruments.com

 

[Soukadesu]

Honestly, I'd go with the new 600 series.

SQ-616: 400-750 nm USB output ePAR Sensor

The SQ-616 smart extended photosynthetically active radiation (ePAR) sensor can be connected directly to a computer to take spot measurements or graph and log real-time PFD using the included software.

www.apogeeinstruments.com

It seems like an overkill, don't you think? It may over report the par since it covers more spectrum than the the corals need. Maybe another analog is that it may report higher par with lower actual pur.

 

[oreo54]

It seems like an overkill, don't you think? It may over report the par since it covers more spectrum than the the corals need. Maybe another analog is that it may report higher par with lower actual pur.

Well... maybe.. LED's unless specifically including sub 700nm diodes have little in the high range, so the "error" (debatable regarding 700- to like 800nm) would be extremely low.
The ir portion in "what corals need" is in debate..

Even 6500k t5's have little..