Transducer - Wikipedia

A transducer is a device that converts one type of energy to another, or responds to a physical parameter[?]. A transducer is in its fundamental form a passive component[?]. If the component is electrical then it generally has two electrical terminals.

List of transducers

Electrochemical:
Electromechanical:
- actuator[?]
- circuit breaker
- dynamo
- galvanometer
- MEMS
- motor, linear motor
- switch
- piezoelectric
- quartz
- relay
- strain gauge[?] used in weight/force measuring.
Electroacoustic:
Photoelectric:
Electromagnetic:
- reed switch[?]
- antenna (electronics)
- cathode ray tube (CRT)
- photocell or light-dependent resistor (LDR)
- light bulb
- fluorescent lamp
Magnetic:
- Hall effect sensor
Electrostatic:
- electrometer
- liquid crystal display (LCD)
Thermoelectric:
- thermocouple
- Peltier cooler
- thermistor (includes PTC resistor and NTC resistor)
Other:
- Geiger-Müller tube used for measuring radioactivity.
Electronic. These components change one electrical parameter in response to another. By some definitions these are electronic components, not transducers.
Electrical. These components change one electrical parameter in response to another. By some definitions these are passive electronic components, not transducers.
Mechanical.
- gear

Sources/references

The Danish Wikipedia (http://www.wikipedia.org/)

External links

whatis: transducer (http://whatis.techtarget.com/definition/0,,sid9_gci213215,00.html)
Federal Standard 1037C, August 7, 1996: transducer (http://www.its.bldrdoc.gov/fs-1037/dir-037/_5539.htm)
American National Standard for Telecommunications - Telecom Glossary 2000: transducer (http://www.atis.org/tg2k/_transducer.html)
Search: transducer+definition (http://www.google.com/search?q=transducer+definition)