Use a search engine google, or my favorite, Copernic.
Look at the grow sites for hydroponics. (loads of info and parts in
the pot growers sites as well). I have been in the microfilm, camera,
processing and printing industry most of my life, so I have tested
many parts and sensors for reliability. I also am an electronic
hobbyist, so I build a lot of my own circuit boards for certain
applications. You can cannibalize cheap thermostats from home depot
for sensors. Try a couple of these places as well.

http://www.controlsupply.com/humidity.htm
http://www.greenair.com/product.htm
http://www.atlantishydroponics.com/index.html
http://www.fullbloomhydroponics.com/
http://www.greenbeam.com/home.stm
http://www.graybar.com
http://www.grainger.com/Grainger/wwg/start.shtml


Grow On
NANOOK














On Tue, 13 May 2003 23:25:55 -0400, "Ted Byers"
wrote:

Sensors and thermostats
helped instead of just timers (although timers would probably work just
fine
for a few weeks). I had an extra computer left over from upgrading my
wife's
which I could then program to control most of the sensors.

Where did you find these sensors, and exactly what were you measuring?
Finding suitable sensors has been, and continues to be, the most problematic
part of my efforts to make a growth chamber.

I can not take a vacation since the only person who could conveniently take
care of my plants is my sister, and she has such a black thumb she can even
kill plastic plants. ;-) I DID manage to teach her daughter how to keep
an african violet happy (though I help her out a bit when she's at school or
in bed), but she is still too young to take on such a responsibility for
plants that cost just a wee bit more than her C$2 violet.

Cheers,

Ted