Hmmm, I must have been looking at some really super special stuff, now I see US Plastics (a company I have used many times) has it at a reasonable price like this. I’m not sure that “UV Stablized” is good news though…
I purchased a cheap personal summer UV meter on the way home last night and did some quick comparisons of materials with it and definitely showed up the differences. It also had a mW/m2 value as well that gave a much finer differentiation than just the UV scale. But yes, Teflon wa already indicated as a good UV transmitter, and despite whatever claims there are, all non UV stabilised products will suffer degradation over time. Even some UV resistant or staiblised products will slowly suffer.
Thanks Breitling, something else to consider and we are narrowing down the field. 
PE materials were good in the test last night too.
TK
when does a UV 1 wire setup screen need to be added to WD by?
you will need to enter a scaling factor?
and its the VAD voltage , via a DS2348Z (i.e ‘1 wire Humidity sensor with the humidity sensor removed’)
so in simple terms, what would the formula be?
there is already support for UV graphing and displaying and logging (once a flag has been set to say you have a UV sensor)
It seems MichaelPT has one ready to run now but Derek (StokesValleyWeather) requested it in this thread…
http://discourse.weather-watch.com/p/281317
in the Feature Requests
December 02, 2008, 07:51:58 PM
Can you please add the ability in WD to read the VAD value from a DS2438Z and calculate WHO UV Index based on a Calibration value in much the same was as MichaelT's does except the Calibration value is constant.I would like the ability to add the calibration value my self . i.e. WHO UV Index = VAD / Xcal.
E.g. WHO UV Index of 5 = 0.65V / 0.13
Voltage output of the Circuit I am using is Linear, and thus does not/should not require individual Calibration Values/ranges for the index. Calculation to 1 Decimal place should be OK.
I am hoping to get a UV photodiode and op-amp circuit this week in Wellington myself and I have a spare solar board to trial it with after next weekend sometime the week of the 9th March. I already have a UV meter as a basis for comparison, but it does not have any analogue output other than a mW/m2 or UV index value on the LCD screen. And I can’t guarantee its accuracy, but it is good for initial setting up and comparisons.
Thanks - sometime when you have time Brian… Thanks for picking up on the thread.
Graeme