You might want to check out something called "SmartTemp"
It sends the temp value as a pulsetrain all you haveto do is to check the
ratio between low-high and the % is linear to the temp. They even supply
PIC asm demo.
Extremly simple principle : Just sample say 1000 samples and count all
high and all lows u get. That will give you the ratio !

The senssor itself is TO92 (very small, looks like a small transistor) and
it comes lasertrimmed to better than 0.5-1 degree celsious depending on
which casing you choose. Cable lenght can be very long.

If this seems interesting I can dig out some old ASM I did way back to
test it. And some more detailed info.

/PJ

From: "Pedro Drummond"
> It will run up to my house's roof, to measure water temp on pipes that are
> heated by sun panels. Maybe 15 to 20 meters total length, at the most.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics