My question would be how do the commercial applications withstand the environment? I have seen commercial products, tightly sealed to withstand almost everything being completely rotten from inside after 6 months in a cow barn. Typically the boards had no protection but a super tight sealing. Did not help much though. The fumes were eating through the seals and the devices.
Probably there exist devices that would withstand this environment but most commercial vendors either underestimate the agressiveness of this environment or already calculate for lots of returns.
My conclusion is that most commercial solutions will harden it by suitable cases (incl. shielding) and protecting the IO lines. For protecting the IOs the Gator was already mentioned.
For the case and the shielding it depends on how much you want to spend.
Cheers, Udo