Transducer
From ExoDictionary
Transducer
A device capable of being actuated by energy from one or more transmission systems or media and of supplying related energy to one or more other transmission systems or media, as a microphone, a thermocouple, etc. The energy in input and output may be of the same or different types (e.g., electric, mechanical, or acoustic).
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use