Anti-rotation method for angled face cap probe

An angled face cap probe for use in a gas turbine engine, the angled face cap probe comprising:

• a housing with a radial axis extending therethrough, the housing having a radially inner end and a radially outer end, defining a cavity, and configured to be located radially outward from an airfoil;
• a sensor located in the cavity at the radially inner end of the housing, having a sensor body with a center axis, a sensing face, and a sensor flat, the sensing face disposed at a first end of the center axis and being angled to match or substantially match an angle of a radially outward face of the airfoil, the sensor flat disposed at a second end of the center axis that is orthogonal to the first end of the center axis, the sensor flat being elongated in a first direction to provide a first sensor flat side and a second sensor flat side opposite the first sensor flat side;
• an outer cap located in the cavity, coupled to the housing, and having an outer cap main body and cap legs that extend radially inward from the outer cap main body to interface with the sensor flat to resist rotation of the sensor relative to the housing, the cap legs including a first cap leg configured to engage the first sensor flat side and a second cap leg configured to engage the second sensor flat side upon rotation of the sensor about the radial axis;
• and
• an inner cap located in the cavity between the outer cap main body and the sensor.

An angled face cap probe for use in a gas turbine engine, the angled face cap probe comprising:

• a housing with a radial axis extending therethrough, the housing having a radially inner end and a radially outer end, defining a cavity, and configured to be located radially outward from an airfoil;
• a sensor located in the cavity at the radially inner end of the housing, having a sensor body with a center axis, a sensing face, and a sensor flat, the sensing face disposed at a first end of the center axis and being angled to match or substantially match an angle of a radially outward face of the airfoil, the sensor flat disposed at a second end of the center axis, the second end being orthogonal to the first end, the sensor flat being elongated in a first direction to provide a first sensor flat side and a second sensor flat side opposite the first sensor flat side;
• an outer cap located in the cavity, coupled to the housing, and having an outer cap main body and cap legs that extend radially inward from the outer cap main body to interface with the sensor flat to resist rotation of the sensor relative to the housing, the cap legs including a first cap leg configured to engage the first sensor flat side and a second cap leg configured to engage the second sensor flat side upon rotation of the sensor about the radial axis;
• and
• an inner cap located in the cavity between the outer cap main body and the sensor and tapering towards an inner cap inner end that applies compressive force to the sensor flat of the sensor.