>I'll keep you posted on what I find.  What was the sensor you found for
>$2.50?
>

Made by Fujikura. US Rep is Servoflo Inc. Call 617-862-9244 and ask for
David Ezekiel. Onesies price was more than three times as high, as I
recall. There are comparable parts by Sensym and Motorola that are somewhat
more expensive, and all three companies make devices with built-in opamps
for 0-5V compensated output, but those are WAY more expensive. Also, my
application can only budget a couple of mA or less, and the high-level
output devices use 10 or 20.

Good Luck,
Reg