Source: https://www.mar-el.no/produkter/sensorer/hastighetsensorer/inductive-pulse-sensor-fgl-1/_/attachment/inline/307a518d-e6f2-4bb2-aad1-be91128cd70f:8a5554ee712908b74c221ca4511af41c52522e3f/inductive-pulse-sensor-fgl-1.pdf