Sun Shade Requirement for Field Instrument

What is your question? Please try and be more precise. Do you want shade? Do you want protection from chemicals. Get some one to translate maybe, Ky.

If an instrument is in direct sunlight with an ambient temperature of 55°C, The instrument temperature could very easily exceed 100°C in well under an hour, just from solar radiation. All electronic devices produce at least a little heat, so even with a sunshade, this instrument could easily exceed 60° within two hours, and there went your warranty!

Obviously, I have no idea what kind of instrument you are referring to, but in my opinion, you not only need a sunshade, you also need some other form of cooling to use the instrument for more than a few minutes in a 55°C ambient, and maintain reliability.