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The search coil (also known as Inductive Sensor) is a sensor which measures the variation of the magnetic flux. The search-coil can measure magnetic field from mHz up to hundreds of MHz. It is associated to a conditioning electronic to make a search coil magnetometer (also known as induction magnetometer). == Principle == The induction sensor is based on Faraday's law of induction. The temporal variation of the Magnetic Flux through a ''N'' turns circuit will induce a voltage '''' which follows: : which can be expressed in a simpler way: : by assuming that the induced magnetic field B is homogeneous over a section ''S'' (the Magnetic flux will be expressed ). The induced voltage ('''') may be increased several ways: * increase the surface (''S''), * increase the turn number (''N''), * use a ferromagnetic core. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「search coil」の詳細全文を読む スポンサード リンク
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