overview of sensors

hi all,
getting an overview of sensor technology is a bit tricky - - can anyone redirect me to good link collections describing different sensor technologies?

so far i've found:
wikipedia: category: sensor - list of different sensor technologies
ITP sensor wiki - wiki maintained by ITP students
sensedu.com - hungarian educational site from 2004

thanks!
/j

Jabs,

I don't have any links, but I do know of a few books.

Radio Shack's Engineer's mini notebook - Sensor Projects Cat # 62-5026

Siemens - Basics of sensors

Newnes - Sensor Technology Handbook
ISBN: 0-7506-7729-5

Newnes - Sensors and Transducers
ISBN 0 7506 4932 1

Handbook of Modern Sensors Physics, Designs, and Applications

ñeurascenic