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> Sunshine Measurement
Norfolk16
post Jan 16 2008, 04:51 AM
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Does anyone have any ideas about how best to measure sunshine amounts? I have a WMR928 which measures most things except the sun.
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WeatherMatrix
post Jan 16 2008, 07:58 AM
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QUOTE(Norfolk16 @ Jan 16 2008, 04:51 AM) *
Does anyone have any ideas about how best to measure sunshine amounts? I have a WMR928 which measures most things except the sun.


I've never looked into measuring it separately...

Solar energy or UV measurement didn't used to be something that many inexpensive stations did, but now the Davis VantagePro has that UV option, and the less expensive Honeywell TW928 comes with UV standard.


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°rjan
post Jan 16 2008, 05:09 PM
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QUOTE(WeatherMatrix @ Jan 16 2008, 01:58 PM) *
I've never looked into measuring it separately...

Solar energy or UV measurement didn't used to be something that many inexpensive stations did, but now the Davis VantagePro has that UV option, and the less expensive Honeywell TW928 comes with UV standard.

do go for an instrument that measures watts pr m2, and not the ''lux'' models, that gives just the grade of brightness, not the effect of solar radiation.........most meteorological societies are interested in watts or mj hours pr m2, so think davis vp2, expensive but good stuff

°rjan
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Weather Display
post Jan 19 2008, 04:14 AM
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Hi
Weather Display software caculates sunshine hours (e.g from a Davis VP solar sensor)
( by comparing the wm/2 with expected)
but it can also be done from a temperature sensor in a jar with the wmr968 station type
just a FYI wink.gif


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Norfolk16
post Jan 26 2008, 03:39 PM
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Thanks everybody. I thought I saw something that looked like a glass paperweight with a piece of graph paper behind it which the sun burned a mark in if it came out. There must be a way of doing the same thing in a digital way like much easier than rainfall measuring. In a place like the UK where there is so much cloud, long periods of sunshine are almost as exciting as major events like snow or floods and lots of sunshine also makes people feel so much happier as well
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Cres
post Mar 8 2008, 11:14 AM
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Hi

I have WMR928NX and I plan to buy UVR138 UV sensor.

Does anybody use it and is it posible to get watts per m2 with it , or sunshine hours, or it just mesures UV index 1-25?

I use Virtual Weather Station software.

Thanks for any info!
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°rjan
post Dec 7 2008, 05:54 PM
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QUOTE(Weather Display @ Jan 19 2008, 11:14 AM) *
Hi
Weather Display software caculates sunshine hours (e.g from a Davis VP solar sensor)
( by comparing the wm/2 with expected)
but it can also be done from a temperature sensor in a jar with the wmr968 station type
just a FYI wink.gif

ha-ha, that was a good one.............ive heard''whiskey in the jar'', but i shall now try out your idea on a diagram

°rjjan


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