Humidity　sensors　play　a　crucial　role　in　various　sectors,　including　industrial　applications,　environmental　monitoring,　and　human　health.　With　the　increasing　adoption　of　self-powered　humidity　sensors,　it　is　imperative　to　develop　devices　that　exhibit　adaptability　across　multiple　environments.　In　this　study,　we　designed　a　high-temperature　resistant,　self-powered,　flexible,　and　highly　responsive　(TPC)　humidity　sensor　based　on　ceramic　fiber　paper　(CFP),　intended　for　fire　alarm　systems　and　rapid　humidity　monitoring.　The　sensor　incorporates　ceramic　fiber　paper　as　the　core　substrate,　PI　tape　as　the　thermal　insulation　protective　layer,　and　employs　manganese　dioxide　and　aluminum　foil　as　the　positive　and　negative　electrodes,　respectively.　Thanks　to　the　superior　moisture　absorption　and　conductivity　of　the　electrolyte　material,　the　TPC　sensor　can　spontaneously　generate　voltage　across　a　broad　range　of　40–95　%　relative　humidity　(RH)　at　25　°C.　Remarkably,　a　single　TPC　sensor　can　produce　a　voltage　of　0.92　V　at　95　%　RH,　yielding　a　maximum　power　output　of　28.88　μW.　The　TPC　sensor　demonstrates　excellent　cycling　stability　in　both　high-temperature　and　room-temperature　environments.　By　integrating　the　TPC　sensor　with　a　microammeter,　fire　alarm　is　realized.　Furthermore,　applications　of　the　TPC　respiratory　rate　monitoring,　diaper　monitoring,　and　non-contact　switching　are　demonstrated.　©　2025　Elsevier　B.V.