Sunlight PUR

Dana Riddle · Jan 18, 2019

Sunlight PUR on a slightly overcast day is 63% (Kelvin is 6,100) according to the Seneye device. I also checked Kelvin of a Class A light source (a clear incandescent lamp) and it was about 2,800 - exactly what it should be. A remarkable instrument. Baseline data for an upcoming project.

shred5 · Jan 18, 2019

Dana Riddle said:
Sunlight PUR on a slightly overcast day is 63% (Kelvin is 6,100) according to the Seneye device. I also checked Kelvin of a Class A light source (a clear incandescent lamp) and it was about 2,800 - exactly what it should be. A remarkable instrument. Baseline data for an upcoming project.

I have been thinking of picking up a par meter
How accurate do you feel the seneye is?
Does it need a correction factor?

Dana Riddle · Jan 18, 2019

shred5 said:
I have been thinking of picking up a par meter
How accurate do you feel the seneye is?
Does it need a correction factor?

I really like the Seneye. It accurately reports ionized ammonia (I ran tests on ammonia samples tested with a Hach 890 colorimeter using the salicylate method which involves pH which is reported spot on as well.) Temperature is reported within a tenth of a degree compared to a Hach pH probe and HQ40d multi-meter. I am astounded that this inexpensive device accurately sees Kelvin (up to about 11,000K or so) and I have no reason to doubt its PUR numbers. Haven't taken the time to compare PAR and lux numbers with my meters - Tim Wijgerde (European coral scientist) sent me some comparisons that were very favorable and I trust him.