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

[Mark J]

MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

In message <000f01c7132c$88641e60$6700a8c0 at Inspiron>
          "Karl Uppiano" <Karl.Uppiano at verizon.net> wrote:

> I have had good results with mine once I shielded it from the light. I found 
> that even indirect sunlight on a bright sunny day -- even inside a radiation 
> shield -- would cause the sensor to get all flaky. I put a small piece of 
> black heat shrink tubing over it, leaving openings at each end for the air 
> to circulate (i.e., I did not shrink the tubing, I just allowed it to remain 
> loose). This sensor has been in place for about 18 months, and the original 
> one might have been OK too, if I had shielded it from the light.
> 
> The relative humidity around here is frequently 100%. 

- but at what temperature? I have lost three, and have come to the
conclusion that (with me) low temperature plus high humidity could be
the cause. The data sheet puts the lower operating limit at 100%rh as
0C, although it doesn't say what the consequences of violation are.

All were very well shielded from direct moisture and sunlight...

[snip]

-- 
E.Mark Jolliffe
www.poppy-land.co.uk