発はっ見けん器き

noun

detector; detecting device

General term for a device or machine that detects something, such as gas, metal, or radiation.

• ガス発はっ見けん器きが警けい報ほうを鳴ならした。

  The gas detector sounded an alarm.

• 金きん属ぞく発はっ見けん器きでコインを探さがす。

  Search for coins with a metal detector.