Detector
Detector , noun
[Latin, a revealer.]
One who, or that which, detects; a detecter. — Shakespeare
A deathbed's detector of the heart.
2.
(a) (Electricity) An indicator showing the depth of the water in a boiler.
(b)
(Electricity) A galvanometer, usually portable, for indicating the direction of a current.
(c)
(Electricity) Any of various devices for detecting the presence of electric waves.
Collocations (2)
Bank-note detector , a publication containing a description of genuine and counterfeit bank notes, designed to enable persons to discriminate between them.
Detector lock , See under Lock.