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Inductive proximity sensor for detecting ferromagnetic, non-permeable or magnet targets

  • US 6,507,189 B2
  • Filed: 02/28/2001
  • Issued: 01/14/2003
  • Est. Priority Date: 02/29/2000
  • Status: Expired due to Term
First Claim
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1. A proximity sensor, comprising:

  • a member having a top surface, a bottom surface, and a side surface having a width between the top and the bottom surfaces of the member, wherein the top surface is generally planar, and wherein the member defines a cavity that extends into the member from the top surface, wherein the cavity is in the shape of an annular groove having an outer wall formed by the side surface of the member and a base wall formed by the bottom surface of the member, wherein the outer wall and the base wall have a thickness less than or equal to 0.06 inches; and

    a sensing coil positioned in the cavity for allowing magnetic flux communication between the sensing coil and the core.

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