Guanton75-
Sounds like you're "reaching into thin air" for environmental specs.  Does your customer have environmental specs or are you writing them yourself?

Tunalover

We are designing a product to sell to production facilities.  We don't have a specific customer in mind however we see it going into chemical or assembly plants.  I think it's safe to say we want to stay out of heavy construction.  I'm looking for a general or average plant climate so we can tolerate most environments.  One group suggested NEMA 12 and 95% humidity and 105 degrees F.

Thanks,
Seth

Guanton75-
NEMA 12 sounds good but you may wish to consider invoking an IP67 ingress protection level per IEC 529.  That system is gradually replacing the NEMA system.  It is becoming more widely accepted in the US and worldwide (as opposed to NEMA).

One consideration you need to make also is EMI and solvent resistance.  Factories are extremely noisy regarding EMI.  One source of EMI specs is MIL-STD-461 but I'm sure there are other, less benign commerical specs available.

For solvent resistance, silicone seals are about the best choice but you must, one-by-one, consider ALL chemicals at ALL target plants.  There may be solvents involved that degrade silicone.  Note that the doors and enclosures could have combination EMI/environmental seals and silicon is the normal choice for the matrix material.

Tunalover

Guanton75-
I said:

"One source of EMI specs is MIL-STD-461 but I'm sure there are other, less benign commerical specs available."

but I meant to say:

"One source of EMI specs is MIL-STD-461 but I'm sure there are other, more benign commercial specs available."

Tunalover