Sensors and Transducers

Geiger Counter Tubes - Primary radioactivity detector Humidity Sensor
Flexible Stretch Sensors - Variable resistance stretch sensor Photoresistors - CdS
  Solar Cells - Photovoltaic Cells
Pressure and Force Sensors - Measure's forces Piezoelectric Film Sensors - Vibration/impact detection
Electronic Compass Piezoelectric Switches - momentary pulse switches
Tilt Switches - Mercury/glass tilt switch Gas Sensor - Toxic Gas Sensor