AVR-Chat

iiuc, this problem is not particular to electronic outdoor temperature
sensing. the same can be said about mecury thermometer placed outdoor.
electronics only bring the readings indoor and perhaps into a pc, then
even on to the internet. also, sometime it's not only the absolute
readings that're of interest but also the trends, from one day to
another, from one month to another and if it survives that long, from
one year to another...

--kong

--- In AVR-Chat@yahoogroups.com, Thomas Keller <tkeller1@n...> wrote:
>
>   One thing that has always bothered me about electronic weather
station 
> design:
>    How do you normalizee temperarture readings (perhaps I am using the 
> wrong term here).?
> 
>    If you place your temperature sensor diredtly in the sunlight, it 
> will likely register a higher reading thanthe actual ambient ait 
> temperature, due to direct heating by the IR of the sun.  if you
enclose 
> it, you have the heating of the enclosure to correct for.
> 
> 
>   Enclose it in something highlky reflective? (e.g., a piece of white 
> ABS pipe, with plenty of airflow thhrough it, or a polished aluiminum 
> enclosure with plenty of airflow?)   Simply place it under an "awning" 
> laid out to insure that no sunlight impinges directly upon the
sensor?   
> How far fromthe inner surface of this awning would thesensor need to
be, 
> not to pick up erroneous readings due to radiation of heat fromthe
awning?
> 
> *heh*  sometimes my mind asks too many quesitons, eh?
> 
> tom
>