High temperature gas sensors for combustion processes are essential to improve energy efficiency and reduce toxic emissions.

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With the development of wearable electronic devices, electronic-textiles have attracted more and more attentions due to its widely applications in human movement monitoring, health and physical indicators monitoring (e.g. heartbeat, pulse, body temperature, limb movements, and vocalization). As a vital part of electronic textiles, graphene strain sensors that based on fiber assemblies (FGS) is of concern to the researchers due to its well integration of graphene with fibers assemblies, which will inevitably promote the rapid development and widespread applications of next-generation wearable electronic devices. Fiber assemblies exhibit outstanding ability of structural retention and fatigue resistance during wearing and washing, which can provide a large-area affiliated carrier and widespread service platform for the design and application of electronic-textiles. And the graphene endows electronic-textiles with good electrical and mechanical properties. Herein, the previous researches on fabrication, sensing mechanism, sensing performance indexes, and application field of FGS are systematically summarized. Furthermore, the potential difficulties and future development prospect of FGS are summarized and discussed. It is expected that this review is not only a summary of what has been achieved, but also provide a guideline for future development.

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