Thin-filament pyrometry

Thin-filament pyrometry (TFP) is an optical method used to measure temperatures.

It involves the placement of a thin filament in a hot gas stream.

Filaments are typically silicon carbide (SiC) fibers with a diameter of 15 micrometres.

[4] The typical TFP apparatus consists of a flame or other hot gas stream, a filament, and a camera.

TFP has several advantages, including the ability to simultaneously measure temperatures along a line and minimal intrusiveness.