detector
//dɪˈtɛktər//
Noun
detectorSingular
detectorsPlural
1
A device or instrument designed to discover or identify the presence of something, such as smoke, metal, radiation, or other substances.
The smoke detector in the kitchen started beeping when I burned the toast.
2
A person who detects or discovers something, especially in an investigative capacity.
The detective was known as a skilled detector of fraud.