A detector is a device capable of registering a specific substance or physical phenomenon.
Detector may also refer to:
- Detector (radio), a device that recovers information from a modulated wave
- Detector (film), a 2000 Norwegian film
- USS Detector, two United States Navy ships
- USS Detector (AMc-75), was a coastal minesweeper launched 29 May 1941
- USS Detector (AM-429), was a minesweeper launched 5 December 1952
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