Thermal Solutions Inc. (Wichita, Kan.) has developed a monitoring technology that allows for the noninvasive recording of temperatures within and between plies and cores in finished composite parts. The technology revolves around magnetic element temperature-sensing systems, which feature small bundles of amorphous microwires that measure 0.0007 inch/0.02 mm in diameter and about 0.85 inch/21.6 mm in length. These sensors can be embedded within a laminate and then “read” with a handheld sensor to determine temperature. The read range of the sensor is 2 ft/0.61m, and the operating range of the sensors tops out at 600°F/316°C. The reader is interfaced with Windows-based software and is designed for control of external machines. The manufacturer says the technology can be used to monitor and record temperature history during initial cure, during repair process cure, during postcure or during material/product use.