remote temperature sensing

I would like your thoughts on the best way to monitor/log remote
temperatures with a range of about 200 feet. I am working on a project that
will monitor my oil-fired furnace temperature and then also monitor the
differnent rooms of my home and have fun with it.

I've tried the LM34 but with the lengths of the runs I don't get reliable
results when I input the voltage into and ADC. What are your thoughts. How
is it usually done. I'm interfacing this all to an 8031.

Thank you , Carl


.

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