noun
pickup; sensing element; transducer
Technical term in engineering and instrumentation for a device that converts one form of energy into another, especially for measurement or signal detection.
このセンサーは圧電変換子を使っている。
This sensor uses a piezoelectric transducer.
変換子の感度を調整する必要がある。
It is necessary to adjust the sensitivity of the sensing element.
トランスデューサー is a direct loanword for transducer, often used interchangeably with 変換子 in technical contexts, but 変換子 is the native Japanese term.
Compound of 変換 (へんかん, 'conversion') + 子 (し, 'element' or 'device'), literally 'conversion element'. The term is a modern technical coinage.