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Solar Radiation Meters - Handheld?

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Posted by schooner on August 25, 2006, 9:56 pm
Anyone know of a good handheld solar radiation meter?  Something to measure
solar radiation levels for checking solar hot air heater efficiency.
Basically want to get a good reading of the solar power available on a given
day to compare panel output levels.

Posted by Anthony Matonak on August 26, 2006, 2:40 am
schooner wrote:

You could probably make one yourself that would work well enough
by connecting a small (smallest you can find) solar PV panel to
a meter in series with a resistor.

I found an article that describes how to build one here...
http://www.discovercircuits.com/forum/showflat.php?Cat=0&Number '44&an=0&page=0#Post2744

Alternatively, you can look for products called things like
"solar pyrometer", "solar insolation meter" or simply "light meter".

I did a quick www.froogle.com search and found the following.


Posted by nicksanspam on August 26, 2006, 8:14 am

I'd skip the reistor and measure the short circuit current.


Posted by schooner on August 26, 2006, 10:08 am
 Nick - when you say read the short circuit current, do you mean just read
the current directly across the panel with no resistor with a multimeter?

Posted by nicksanspam on August 26, 2006, 11:38 am

Yes. I think that gives a more linear response.


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