Topic: What is the deal with these shield models?

[hmderek]

So you have the R.M. Young 41003: https://www.youngusa.com/product/multi-plate-radiation-shield/

Then there is the Rotronic AC1000: https://www.rotronic.com/en/ac1000

They look very similar, though there are differences between them, (9 vs 10 plates for example). But the bracket looks suspiciously similar.

Then you have this model at Seeedstudio: https://www.seeedstudio.com/Solar-Radiation-Shield-for-Outdoor-Sensor-Protection-A10-p-4601.html

Totally different pricing, but once again they look alike and the bracket is the same.

And how about this? -> https://nl.aliexpress.com/item/32828473654.html?spm=a2g0s.8937460.0.0.4e882e0eg07DZZ

Also very similar, same bracket.

Aside from the Rotronic (with  9 in stead of 10 plates), are these clones? If so, would you expect one of the clones to perform similarly?

[TheBushPilot]

Probably manufacturers using the same item from Young and rebranding them. That last one you posted however is probably a copied replica or mix and match of Young and their stuff, as noted with the different nuts on the bottom.