Patent ID: 9182212
Filing Date: 2015-11-10
Classification: G01B,H01L

Abstract:
1. A Hall sensor probe configured to be coupled with one of a plurality of Hall sensor targets for measuring the thickness of a non-ferromagnetic wall, comprising, a magnetic field sensor, a magnetic field concentrator and a primary magnetic field source for providing a primary magnetic field along an axis; a main housing enclosing at least a major portion of the magnetic field source; and a replaceable wear tip enclosing at least a major portion of a tip-end of the concentrator, leaving a gap; wherein the replaceable wear tip, the sensor, concentrator, the primary magnetic field source and the main housing are concentrically assembled along the axis of the primary magnetic field; and, wherein the replaceable wear tip is exchangeably affixed onto the main-housing, and the replaceable wear tip is made of material having a fracture toughness higher than 20 MPa—in wear coefficient higher than 100, and a magnetic susceptibility lower than 0.01.