Re: Weather station radiation shield
Desert Land rovers used to use a heatshield roof, to reduce direct heating, perhaps you could use a concentric heatshield with vents top and bottom, to do the same sort of thing!
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
Re: Weather station radiation shield
Let the experiment begin:
I have labeled all the elements. They are approximately 10 cm away from the UVC lamp. I used some tape to cover a part of the plastic for comparison once the experiment is over. The only problem is I ordered Traffic White ASA, which is not exactly white, but it should be enough for the purposes of the experiment. Let's see what will happen in 2 weeks.
Re: Weather station radiation shield
I left the parts under the UVC for a little longer. This is the result:
The ASA has changed its color the most:
The PLA is only slightly yelower:
And the clear winner is the PETG which is as white and shine as before the test.
I know the pictures made with my phone are not the best, but the deterioration of the ASA is clearly visible. And PETG is nice and shiny.
Re: Weather station radiation shield
You're letting UVC loose in a lab you occupy?
Re: Weather station radiation shield
That's very weird. ASA is a UV, weatherproof, plastic. That's what it's intended for. The white pigment I'd expect to be titanium dioxide, which shouldn't be affected by exposure. What brand are you using? That yellowing is something I'd expect from ABS, rather than ASA. e.g.: https://blog.trimech.com/differences-between-abs-and-asa
Actually, I see you didn't get a pure white ASA. Perhaps it's just the pigments.
Re: Weather station radiation shield
Well, for one thing, UVC isn't a band that actually gets down to the surface... hence, ASA may not do well there. What UVC does rather well is corrupt DNA.
Re: Weather station radiation shield
Hi,
I have access to an operation theater and the UVC lamps work during the night. UVC doesn't get to the ground, but I wouldn's expect UVA and UVB to have a different effect over a long period of time.
It could be the pigment, but if you are advertising something as weather resistant the pigment should also not deteriorate. This is the fullament I used.
https://www.3djake.bg/fillamentum/asa-extrafill-traffic-white
I am very happy how well PETG withstood the test. It is a very nice material to work it, very durable and hard.