A Miniaturized, High‐Fidelity Wearable Respiration Sensing System for Diverse Physiological States Monitoring

ABSTRACT Continuous monitoring of human respiration is essential for health assessment; however, conventional systems are often bulky and highly susceptible to environmental airflow disturbances. Herein, we report a flexible and lightweight wearable respiration sensor that integrates a negative temperature coefficient (NTC) thermistor with a laser‐induced graphene (LIG) thermal actuator to establish a localized and stable thermal field, thereby enhancing signal contrast and robustness. The device performance was systematically evaluated under multidirectional environmental airflow. An interference factor was defined to quantitatively assess airflow‐induced disturbances, demonstrating stable operation even under challenging conditions. Furthermore, the sensor accurately captures respiratory signals during diverse daily activities and reliably monitors sleep‐related breathing patterns, including apnea‐like events and snoring. These results highlight the device's high‐fidelity detection capability, strong resistance to environmental interference, and broad potential for real‐world wearable respiratory health monitoring.