Hello forumers.

I am currently in the early planning stages of designing a prototype device, maintaining temperatures in a wide range (-20 - 65 C), in small enclosures. Im experimenting with various types of electronic controllers.
The TECs i have selected are standard types, which does not come with any RTV/other seal. I expect the device to be submitted to

What is the "right" and "quick" ways respectively to accomplish long-term error free operation?

Best Regards

Kristian Kjeldsen
Highstone Ind.