Infrared (IR) flame detectors monitor the infrared spectral band for specific patterns given off by hot gases. These are sensed using a specialized fire-fighting thermal imaging camera (TIC), a type of thermographic camera. False alarms can be caused by other hot surfaces and background thermal radiation in the area.
How to Grill Filet Mignon. 1  For a charcoal grill, place the meat on a grill rack directly over medium coals; grill uncovered. 2  For a gas grill, preheat the grill; reduce the heat to medium. 3  Place the filet on the grill rack over the heat. 4  Cover the grill. Place the filet on the grill rack over the heat. 2  Cover the grill. 3  Use the following timings for grilling filet mignon, and turn once halfway through the grilling time: 4  For a 1-inch cut, grill 10 to 12 minutes for medium rare (145 degrees F) or 12 to 15 minutes for medium (160 degrees F).
For medium, cook to 145F (63C); for rare, cook to 130F (54C). When removing the filets from the grill, it is best to place them on warm plates. Always allow filet mignon to sit for five minutes before serving to ensure that the flavors have time to settle, and then you may slice the meat and serve as desired.