This image shows seven SiC filaments glowing in and above a laminar jet diffusion flame. With diameters 14 μm these fibers are thinner than a human hair and are used to measure temperature. The fuel is 24 percent methane (by volume) in nitrogen with a flowrate of 8.06mg/s; a surrounding air coflow prevents flame flicker. The scale is revealed by the 14-mm inside diameter of the fuel port