Broan makes a fan with a built-in motion detector.
http://www.broan.com/display/router.asp?ProductID=649

You could also try installing a ceiling motion sensor to activate your
existing fan.


"dk" wrote in message
...
I'm looking for a device that will allow my bathroom fan to
automatically turn on when someone enters the shower/toilet section of
my bathroom. I tried a light switch motion detector but It didn't work
properly. Is there such a device??