If you are interested in building you own device, or just looking to explore new applications, take a a look at the page that provides links and references to Accessible and Affordable Sensors. Alternatively, take a look at the applications page (link above) for some examples of different applications.
The Physics of Sensing
An introduction to the physics of sensing.
Affordable Sensors
Links to accessible and affordable sensors.
Fiber Optics
Exploiting fiber for local and distributed sensing.
Visible & Near Visible Photonics
Cameras, infrared and near infrared (Lidar).
Noise and Vibration
Listening to mechanical vibration, fluid flow.
Active and Passive Seismic
Earthquakes, micro-seismic and seismic imaging.