Platinum resistance temperature sensor having floating platinum member

A temperature sensor includes a main body having a peripheral surface that extends along an axis between ends of the main body. A plurality of support structures are arranged along the main body and project from the peripheral surface of the main body transversely to the axis. A sleeve has a cavity defined by one or more sidewalls extending between first and second ends. The main body of the temperature sensor is positioned within the cavity. A platinum member having a length that extends along the main body is supported by a set of support structures of the plurality of support structures. In some cases, a seal member extends between the one or more sidewalls at the first end of the sleeve and seals the main body and the platinum member within the cavity. Measurement terminals may extend from the platinum member to an exterior of the temperature sensor.