electronic locator; metal detector
Technical term for a device that uses electronic means to detect or locate objects, especially metal. Often used in security, archaeology, and industrial contexts.
They inspect baggage using electronic detectors at the airport.
This electronic locator can find metal underground.
金属探知機 specifically means 'metal detector', while 電子探知器 is a broader term for any electronic detection device, including metal detectors.
Compound of 電子 (electronic) and 探知器 (detector). The exact historical derivation is uncertain; the term follows standard technical word formation patterns.