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Figure 4. Application scenarios of the fibrous temperature sensor. (A) Schematic illustration of potential applications of the fibrous temperature sensor. The fibrous temperature sensor systems could provide temperature monitoring and early warning in various fields, including firefighting, sports activities, and infant care; (B) Photograph of the fibrous temperature sensor integrated into the firefighting suit. The unique double-layer temperature-sensitive structure was integrated into the smart firefighting suit. Scale bar, 12 cm; (C) Temperature curves of the dual-layer temperature sensing structure in the protective suit. When the temperature of the electric heating plate rises gradually, the outer fibrous temperature sensor can sense the change of the external temperature in time. When the firefighter’s internal temperature is abnormal, it can provide a timely warning; (D) Photograph of the fibrous temperature sensor integrated into the wristband. Scale bar, 1 cm; (E) Temperature curves of the wrist when running. The subject was asked to run for 10 min, and the body temperature was recorded with both a fibrous temperature sensor and an infrared thermometer; (F) Photograph of the fibrous temperature sensor integrated into the infant suit. Scale bar, 7 cm; (G) Temperature curves of the fibrous temperature sensor and the real-time temperature changes of the heating plate. An infant model was dressed in baby suits integrated with fibrous temperature sensors to monitor surface temperature changes and simulate fever warnings.