[werk_ag]

@Werk: Yes, I expect that much of the time the nearer UVB (300 nm) and UVA (350 nm) measurements will correlate quite well. But it's the "unusual" conditions that might be of interest. What about light haze (or perhaps dust from an Icelandic volcano), or under the "hole in the Ozone Layer" in Australia (e.g. does a normally calibrated GUVA-S12SD in Australia ever indicate 17 ? ). My suspicions about the FO Solar sensor were aroused when mine indicated 11 behind glass! Not only is 11 ridiculously high for the UK, but UVB rays are known not to pass through glass!

Cheers, Alan.

Hi, Alan

For that special or "unusual" conditions, most of the common sensors or maybe most of the amateur weather stations are also useless, including Davis, I think.

My intention with this sensors is only to allow an hobbyist like me, in a simple and not expensive way, to have solar rad. and UV data, with some tolerable degree of error, but not as ridiculous as reading a UV index of 11 in UK (unless it was one one of those special occasions )

Regards, Werk_AG