Sensor

The utility model discloses a sensor, which comprises a metal dome, a flexible circuit board, a sensing element and pouring sealant, and is characterized in that the metal dome is used for supporting;one end of the flexible circuit board is attached to the inner side of the metal dome; the sensing element is used for converting the deformation quantity into an electric signal, is positioned on the inner side of the metal dome and is attached to the flexible circuit board; the pouring sealant is poured on the inner side of the metal dome and wraps the sensing element; a metal dome is used as asupporting structure; millions of external force impact effects can be borne; effective deformation, effective resetting can also be realized after stress deformation; the metal dome is of an inverted structure; the flexible circuit board is attached to the inner side of the metal dome, the deformation quantity of the metal dome is transmitted to the sensing element, meanwhile, an electric signalgenerated by the sensing e