The invention discloses a contactless magnetic induction variable resistance device.The contactless magnetic induction variable resistance device is used for mounting on the shell of the aerator controller.The contactless magnetic induction variable resistance device comprises a control knob, a magnetic unit arranged on the control knob and a magnetic induction unit arranged in the shell.The magnetic induction unit and the magnetic unit are arranged at intervals. The magnetic induction unit is used to sense the magnetic field of the magnetic unit and generate a voltage signal correspondingly, and the strength of the voltage signal can change with the distance between the magnetic unit and the magnetic induction unit.本創作公開一種無接觸式磁感應可變電阻裝置。所述無接觸式磁感應可變電阻裝置用以裝設於增氧機控制器的殼體。所述無接觸式磁感應可變電阻裝置包括控制鈕、設置於所述控制鈕的磁性單元、以及設置於所述殼體內的磁感應單元。所述磁感應單元和所述磁性單元呈間隔設置，所述磁感應單元用以感應所述磁性單元的磁場，對應產生一電壓訊號，且所述電壓訊號的強度能隨著所述磁性單元和所述磁感應單元的距離而改變。
