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

[Rich Mulvey]

Nafis, Christopher A (GE, Research) wrote:
>
> 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.
>

Hi Chris:

   I have the same problem with the Honeywell sensor on homemade 
boards.  I've never had the PC boards go bad, after covering them with a 
conformal coating, but the sensor itself always dies after about a 
year.  I even tried periodically blowing it out with canned air, with no 
noticable improvement.

   I've just resigned myself to it being a $25 yearly maintenance item.  ;-)

- Rich