[Weather] 1-wire humidity sensor for outdoor use?

[Nafis, Christopher A (GE, Research)]

Hi,

I've been using the AAG TAI8540 Humidity sensor mounted in a Davis
Radiation shield for an outside humidity/temperature sensor (AAG states
"designed for indoor use"). I've coated the circuit board with liquid
tape, but the honeywell sensor still seems to "die" after a year or so. 
Hobby Boards also sells the HT3-R1-A Humidity / Temp sensor with a
moisture resistant coating.

What are other folks using? Are you protecting the honeywell sensor with
something?
I have a several weatherstations at local schools and this is a
maintenance problem.

Any info appreciated, Chris
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