検けん電でん器き

noun

voltage detector; voltage tester; electroscope

A device for detecting the presence of voltage or electric charge. Used in electrical work and physics.

• 作さ業ぎょう前まえに検けん電でん器きで電でん圧あつがないことを確かく認にんしてください。

  Before work, please use a voltage detector to confirm there is no voltage.