(n) any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner, Syn.sensing element, sensor
n. [ L., a revealer. ] One who, or that which, detects; a detecter. Shak. [ 1913 Webster ]
A deathbed's detector of the heart. Young. [ 1913 Webster ]
2.Specifically:(a) An indicator showing the depth of the water in a boiler. (b) (Elec.) A galvanometer, usually portable, for indicating the direction of a current. (c) (Elec.) Any of various devices for detecting the presence of electric waves. [ Webster 1913 Suppl. ]
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. [ 1913 Webster ]
. (Railroads) A bar, connected with a switch, longer than the distance between any two consecutive wheels of a train (45 to 50 feet), laid inside a rail and operated by the wheels so that the switch cannot be thrown until all the train is past the switch. [ Webster 1913 Suppl. ]
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