Source: https://www.mar-el.no/produkter/sensorer/hastighetsensorer/inductive-pulse-sensor-with-amplifier-type-fgl-01406/_/attachment/inline/745d65f7-bd0b-4423-b01c-30e2ae8e3e9b:53f7eba6d332d52bc7e59824fa3a21b75e093529/General-Datasheet-Speed-Sensors-DK002639-Rev.3.pdf