Transducer
Encyclopedia : T : TR : TRA : Transducer
A transducer is a device, usually electrical, electronic, or electro-mechanical, that converts one type of energy to another for the purpose of measurement or information transfer. Most transducers are either sensors or actuators. In a broader sense, a transducer is sometimes defined as any device that senses or converts a signal from one form to another.
List of transducers
This list is confined to the narrower definition of the term.
- Electrochemical:
- *pH probe
- *electro-galvanic fuel cell
- Electromechanical:
- *(electromechanical output devices are generically called actuators)
- *electroactive polymers
- *galvanometer
- *MEMS
- *motor, linear motor
- *potentiometer when used for measuring position
- *strain gauge
- *switch
- Electroacoustic:
- *gramophone pick-up
- *hydrophone - converts changes in water pressure into an electrical form
- *loudspeaker, earphone - converts changes in electrical signals into acoustic form
- *microphone - converts changes in air pressure into an electrical signal
- *piezoelectric crystal - converts pressure changes into electrical form
- *Tactile transducer
- Photoelectric:
- *Laser diode, light-emitting diode - convert electrical power into forms of light
- *photodiode, phototransistor, photomultiplier tube - converts changing light levels into electrical form
- Electromagnetic:
- *cathode ray tube (CRT) - converts electrical signals into visual form
- *fluorescent lamp, light bulb - converts electrical power into visible light
- *magnetic cartridge - converts motion into electrical form
- *photocell or light-dependent resistor (LDR) - converts changes in light levels into resistance changes
- *tape head - converts changing magnetic fields into electrical form
- *Hall effect sensor - converts a magnetic field level into electrical form
- 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.
Sources/references
[The Danish Wikipedia]See also
External links
- [whatis: transducer]
- [Federal Standard 1037C, August 7, 1996: transducer]
- [American National Standard for Telecommunications - Telecom Glossary 2000: transducer]
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