detector[dē tek′tər, di-; also, esp.for 2 & 3, dē′tek′-]
- a person or thing that detects
- an apparatus or device for indicating the presence of something, as electric waves
One that detects, especially a mechanical, electrical, or chemical device that automatically identifies and records or registers a stimulus, such as an environmental change in pressure or temperature, an electric signal, or radiation from a radioactive material.
From detect + -or (“agent noun forming suffix”).